| Fabrication of Transparent CNT Films for OLED Application |
04 Feb 2010 |
13 pages |
| Authors:
Soonil Lee; AJOU UNIV SUWON (KOREA)
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 | We optimized the process to prepare SWCNT solutions with the good degree of dispersion of individually isolated SWCNTs. The thin-film casting by spin-coating resulted in SWCNT films with uniform sheet resistance and visible-light transmittance. With the control of the spin-coating conditions we were able to control the thickness, sheet resistance and visible-light transmittance with the general trend that the reduction of sheet resistance requires the sacrifice of visible transmittance. Further ... |
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| Advanced Lubrication for Energy Efficiency, Durability and Lower Maintenance Costs of Advanced Naval Components and Systems |
Feb 2010 |
27 pages |
| Authors:
Wenping Jiang; Dmytro Demydov; NANOMECH LLC FAYETTEVILLE AR
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| In boundary lubrication, spacing of mating surfaces in direct physical contact is in the scale of surface asperities. These conditions may benefit from the nanoscale dimension of the advanced nanoparticle lubricants in the following ways: (1) by supplying nano to sub-micron size lubricating agents which reduce friction and wear at the asperity contact zone, (2) by enabling strong metal adsorption and easy wetting, (3) by reacting with the surface to ... |
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| Life Test of 76-Ah Nickel-Hydrogen Cell Designs After 14 Years of Storage |
10 Jan 2010 |
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| Authors:
Albert H Zimmerman; Michael V Quinzio; AEROSPACE CORP EL SEGUNDO CA
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 | A matrix of twelve nickel-hydrogen cells were built in 1988 to develop and validate the Man Tech nickel-hydrogen cell design that has subsequently been used in a wide range of space applications. This cell matrix included three design variations: precharge (hydrogen or nickel), electrolyte concentration (31 % or 38%), and electrolyte amount (drained or drained plus 20 cc). In 2003, eight of these cells were put into a life test ... |
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| Desalination: Status and Federal Issues |
30 Dec 2009 |
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| Authors:
Nicole T Carter; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| In the United States, desalination is increasingly investigated as an option for meeting municipal water demands, particularly for coastal communities that can desalinate seawater or estuarine water, interior communities above brackish groundwater aquifers, and communities with contaminated water supplies. Adoption of desalination, however, remains constrained by financial, environmental, regulatory, and other factors. At issue is what role Congress establishes for the federal government in desalination research and development, and in ... |
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| Synthesis of New High-Oxygen Carriers and Ditetrazinetetroxide (DTTO) |
24 Dec 2009 |
52 pages |
| Authors:
Karl O Christe; R Haiges; R I Wagner; CJ Jones; CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY AND BIOCHEMISTRY
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| The feasibility of tetranitratoborates and tetranitratoaluminates as high-oxygen carriers for oxidizer balanced green solid and ionic liquid energetic materials was demonstrated. The predicted performances of the ionic liquids represent a marked improvement over liquid energetic materials was demonstrated. The predicted performances of the ionic liquids represent a marked improvement over the presently used hydrazine while avoiding at the same time its high vapor toxicity. Simple, one-pot, one-step syntheses from inexpensive ... |
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| Syntheses, Characterizations, and Applications of Molecular Metal Wires and Functional Nanomaterials |
22 Dec 2009 |
15 pages |
| Authors:
Shie-Ming Peng; Chun-hsien Chen; NATIONAL TAIWAN UNIV TAIPEI
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| This report is on research into novel extended metal atom chains and their properties, such as crystallographic, structural, magnetic, electrochemical, and electric conductive properties. |
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| Chemical Facility Security: Reauthorization, Policy Issues, and Options for Congress |
10-Nov-2009 |
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| Authors:
Dana A Shea; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| Facilities possessing certain amounts of hazardous chemicals have been the target of safety and security efforts since prior to September 11, 2001. The sudden release of hazardous chemicals from facilities storing large quantities might potentially harm large numbers of persons living or working near the facility. Congress has debated whether such facilities should be regulated for security purposes to reduce the risk that they pose. The 109th Congress passed legislation ... |
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| Chemical Facility Security: Reauthorization, Policy Issues, and Options for Congress |
03-Sep-2009 |
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| Authors:
Dana A Shea; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| Facilities possessing certain amounts of hazardous chemicals have been the target of safety and security efforts since prior to September 11, 2001. The sudden release of hazardous chemicals from facilities storing large quantities might potentially harm large numbers of persons living or working near the facility. Congress has debated whether such facilities should be regulated for security purposes to reduce the risk that they pose. The 109th Congress passed legislation ... |
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| A Novel Scoring Approach for Protein Co-Purification Data Reveals High Interaction Specificity |
Sep-2009 |
15 pages |
| Authors:
Jaques Reifman; Anders Wallqvist; Joseph Ivanic; Xueping Yu; BIOTECHNOLOGY HPC SOFTWARE APPLICATIONS INST FORT DETRICK MD
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| Large-scale protein interaction networks (PINs) have typically been discerned using affinity purification followed by mass spectrometry (AP/MS) and yeast two-hybrid (Y2H) techniques. It is generally recognized that Y2H screens detect direct binary interactions while the AP/MS method captures co-complex associations; however, the latter technique is known to compute the propensity for two proteins to co-purify in an AP/MS data set, thereby allowing us to assess the detected level of interaction ... |
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| New Electrocatalysts for Direct Oxidation of Organic Fuels |
12-Jun-2009 |
34 pages |
| Authors:
Elton J Cairns; Jeffrey A Reimer; CALIFORNIA UNIV BERKELEY LAWRENCE BERKELEY LAB
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| This project has focused on a detailed study of electrocatalysis of organic fuels and important intermediates (COads) on platinum and platinum alloy electrocatalysts, using advanced NMR tools developed in our laboratory. The highlights of the results include: * CO(g) and CH30H adsorb onto and are oxidized from two types of Pt sites: weakly-bound (WB) hydrogen closely-packed sites, and strongly-bound (SB) hydrogen loosely-packed sites. * Relative rates of adsorption have been ... |
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| Ascent Particle Filter Molecular Conductance Study |
06-Apr-2009 |
39 pages |
| Authors:
Keith R Olson; Kelsey A Folgner; Randy M Villahermosa; AEROSPACE CORP EL SEGUNDO CA
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| Ascent particle filters on enclosures containing space hardware, such as electronics boxes, regulate venting of these enclosures during launch and ascent. While allowing venting to occur, these filters prevent the transport of particles into and out of the enclosures. Particle filters are primarily chracterized with respect to the flow of gas through the filter; the conductance of outgassed molecules is not quantified. This report documents a series of tests performed ... |
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| Characterization of Reaerosolization From Impingers in an Effort to Improve Airborne Virus Sampling |
Apr-2009 |
35 pages |
| Authors:
Jin-Hwa Lee; Chang-Yu Wu; Lindsey M Riemenschnelder; Dale A Lundgren; Hsing-Wang Li; Joseph D Wander; Brian K Heimbuch; FLORIDA UNIV GAINESVILLE DEPT OF ENVIRONMENTAL ENGINEERING SCIENCES
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| An AGI-30 impinger containing particles (MS2 bacteriophage or 30-nm polystyrene latex (PSL)) of known concentration was operated with sterile air. Reaerosolized particles as a function of sampling flow rate and impinge collection liquid concentration were characterized using a Scanning Mobility Particle Sizer. Reaerosolization from the impinge was also compared to that from a BioSampler. Results show that the reaerosolization increases as flow rate increases. While the increased particle concentration in ... |
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| Patterning and Characterization of Carbon Nanotubes Grown in a Microwave Plasma Enhanced Chemical Vapor Deposition Chamber |
Mar-2009 |
127 pages |
| Authors:
Mauricio Kossler; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT/DEPT OF ENGINEERING PHYSICS
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| This research studies the growth of carbon nanotubes from a nickel catalyst to be used on a field emission device. A triode structure was created to be able to patterned the CNTs to improve the emission of electrons. Studies are performed on the effects of hydrogen pretreatment on nickel catalyst of different thicknesses and deposition methods on a silicon substrate and how it will affect the growth of carbon nanotubes ... |
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| Elemental Partitioning Associated with Different Generations of Gamma Prime Precipitates in Rene 88DT Nickel Base Superalloy (Preprint) |
Mar-2009 |
28 pages |
| Authors:
J Tiley; J Y Hwang; R Banerjee; R Srinivasan; G B Viswanathan; H L Fraser; S Nag; NORTH TEXAS STATE UNIV DENTON
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| The compositional and microstructural evolution of different generations of precipitates of the ordered gamma-prime phase during the continuous cooling, followed by isothermal aging, of a commercial nickel base superalloy, Rene 88DT, has been characterized by three dimensional atom probe tomography (3DAP) coupled with energy-filtered transmission electron microscopy studies. After solutionizing in the single gamma phase field, during continuous cooling at a relatively slow rate (approx. 24 degrees C/min), the first ... |
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| Microstructure-Sensitive Extreme Value Probabilities for High Cycle Fatigue of Ni-Base Superalloy IN100 (Preprint) |
Mar-2009 |
48 pages |
| Authors:
Craig P Przybyla; David L McDowell; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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| To quantify the effects of interactions between various microstructure attributes on fatigue life in the high cycle fatigue (HCF) regime, we have proposed a new microstructure-sensitive extreme value statistical framework. This framework couples the extreme value distributions of certain fatigue indicator parameters (FIPs) or response functions to the correlated microstructure attributes that exist at the extreme value locations of these FIPs. We demonstrate the application of this statistical framework to ... |
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| Development of Methods for the Quantification of Microstructural Features in Alpha+Beta Processed Alpha/Beta Titanium Alloys (Preprint) |
Mar-2009 |
22 pages |
| Authors:
J Tiley; H L Fraser; P C Collins; B Welk; T Searles; J C Russ; NORTH TEXAS STATE UNIV DENTON
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| A set of stereological procedures has been developed for the rigorous quantification of microstructural features resolvable using scanning electron microscopy in alpha+beta processed alpha/beta titanium alloys. This paper identifies the four microstructural features that most likely influence the mechanical properties in alpha+beta processed titanium alloy, including: the size of the equiaxed alpha, the volume fraction of the equiaxed alpha, the volume fraction of total alpha, and the thickness of the ... |
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| NbTiSiMo-X Alloys-Composition, Microstructure Refinement and Properties (Preprint) |
Mar-2009 |
15 pages |
| Authors:
C Woodward; Y-W Kim; S Menon; UES INC DAYTON OH
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| Advanced NbTiSi-X alloys have demonstrated very high RT strength levels (compressive yield strength approaching 1,800 MPa) and excellent high-temperature strength retention (approx. 1,200 MPa at 1,000 degrees C and over 500 MPa at 1,200 degrees C). Unfortunately, these alloys have an inhomogeneous size and spatial distribution of silicides, low fracture strength under tension (300 MPa) at all temperatures, and low oxidation resistance. The high volume fraction and non-uniform size distribution ... |
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| Evolution of the gamma/gamma' Interface Width in a Commercial Nickel Base Superalloy Studied by 3D Atom Probe (Preprint) |
Mar-2009 |
15 pages |
| Authors:
J Tiley; J Y Hwang; R Banerjee; R Srinivasan; H L Fraser; S Nag; A R Singh; NORTH TEXAS STATE UNIV DENTON
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| The compositional width of the gamma/gamma-prime interface for primary and secondary gamma-prime precipitates in the commercial nickel base superalloy, Rene 88 DT, has been characterized at sub-nanometer resolution using local electrode atom probe (LEAP) tomography. On formation during continuous cooling, the primary gamma-prime precipitates exhibit a very sharp interface while the secondary gamma-prime precipitates exhibit a substantially more diffuse interface. Interestingly, on subsequent isothermal aging at 760 degrees C, the ... |
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| Spectroscopic Characterization of Reactive Intermediates Relevant to Supersonic Combustion |
28-Feb-2009 |
18 pages |
| Authors:
Mark A Johnson; YALE UNIV NEW HAVEN CT DEPT OF CHEMISTRY
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| Our program specializes in the spectroscopic characterization of molecular ions and reactive intermediates in ion-molecule reactions, and is closely integrated with ongoing activities at the AFRL Space Vehicles Directorate to determine the temperature dependence of ion-molecule and ion-ion reaction kinetics which are important in high-velocity (e.g., scramjet) combustion and re-entry plasma. Our role in this collaboration was to provide experimental benchmarks for bond energies, structures, and stationary points in the ... |
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| Unraveling the Nature of Chemical Reactivity of Complex Systems |
13-Jan-2009 |
34 pages |
| Authors:
Kopin Liu; INSTITUTE OF ATOMIC AND MOLECULAR SCIENCES TAIPEI (TAIWAN)
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| This project was to gain fundamental understanding of the chemical reactivity of complex systems, specifically the state-correlation of product pairs in chemical reactions of polyatomic molecules, and the salvation dynamics of ion-solvent interactions that are fundamental to many important phenomena in chemistry and biology. |
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| Cascade Optical Chromatography for Sample Fractionation |
Jan-2009 |
7 pages |
| Authors:
Alex Terray; Joseph D Taylor; Sean J Hart; NAVAL RESEARCH LAB WASHINGTON DC CHEMISTRY DIV
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| Optical chromatography involves the elegant combination of opposing optical and fluid drag forces on colloidal samples within microfluidic environments to both measure analytical differences and fractionate injected samples. Particles that encounter the focused laser beam are trapped axially along the beam and are pushed upstream from the laser focal point to rest at a point where the optical and fluid forces on the particle balance. In our recent devices particles ... |
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| Materials Design Through Chemical Control of Precursors |
22-Aug-2008 |
11 pages |
| Authors:
Charles H El Winter; Hani M Kadri; Dezelah; Charles L IV; WAYNE STATE UNIV DETROIT MI OFFICE OF RESEARCH AND SPONSORED PROGRAMS
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| Our research project that was supported by the Army Research Office sought to develop improved metal-organic film growth precursors for Pb- and Ba-containing materials, lanthanide-containing materials, and semiconductors that contain small clusters of magnetic elements within the semiconductor matrix. These materials encompass a broad range of military and civilian applications, and their successful development will literally change the way we live. More broadly, we sought to develop chemical insight into ... |
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| Mechanical Properties of EPON 826/DEA Epoxy |
26-Jul-2008 |
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| Authors:
Jennifer L Jordan; Jason R Foley; Clive R Siviour; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
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| Polymers are becoming increasingly used in aerospace structural applications, where they experience complex, non-static loads. Correspondingly, the mechanical properties at high strain rates are of increasing importance in these applications. This paper investigates the compressive properties of Epon 826 epoxy resin cured with diethynolamine (DEA) across strain rates from 10(-3) to 10(4) s(-1). Specimens were tested using an Instron mechanical testing machine for static loading, traditional split Hopkinson pressure bars ... |
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| Automated Classification of Power Signals |
01-Jun-2008 |
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| Authors:
Ethan R Proper; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| The Non-Intrusive Load Monitor (NILM) is a device that utilizes voltage and current measurements to monitor an entire system from a single reference point. The NILM and associated software convert the V/I signal to spectral power envelopes that can be searched to determine when a transient occurs. The identification of this signal can then be determined by an expert classifier and a series of these classifications can be used to ... |
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| In Situ Studies of Defect Nucleation During the PVT and CVD Growth of Silicon Carbide Single Crystals |
01-Apr-2008 |
8 pages |
| Authors:
Michael Dudley; STATE UNIV OF NEW YORK AT STONY BROOK DEPT OF MATERIALS SCIENCE AND ENGINEERING
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| The emphasis in this project was on in situ observation of defect nucleation processes by carrying out CVD homoepitaxial growth of 6H- and 4H-SiC growth in a chamber specially designed to enable synchrotron white beam X-ray topographic (SWBXT) in situ observation of the growing crystal, both bulk and surface regions. In addition a significant amount of ex situ topographic work was carried out on wafers sliced from boules grown in ... |
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| Enhanced Field Emission Properties from Carbon Nanotube Emitters Grown on NiCr Alloy Surfaces with Grain Boundary Effect |
Apr-2008 |
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| Authors:
Setha Yim; Richiro Ohta; Jessie L Killian; Nathaniel B Zuckerman; Emily Allen; Cattien V Nguyen; ELORET CORP MOFFETT FIELD CA NASA AMES RESEARCH CENTER
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| Carbon nanotubes (CNTs) are known to have exceptional field emission properties such as low turn-on voltage and high current density. Nilsson et al. reported that field emission properties depend highly on the density of the CNT films. The CNTs must have low density in order to minimize electrostatic field screening from neighboring nanotubes. At the same time, the CNT films must have a high number of emitting sites to achieve ... |
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| Brain Damage from Soman-Induced Seizures Is Greatly Exacerbated by Dimethyl sulfoxide (DMSO): Modest Neuroprotection by 2-Aminoethyl diphenylborinate (2- APB), a Transient Receptor Potential Channel Inhibitor and Inositol 1,4,5-triphosphate Receptor Antag |
04-Mar-2008 |
21 pages |
| Authors:
Gerald P Ballough; Robert K Kan; James D Nicholson; Denise M Fath; Christina P Tompkins; Gina M Moffa; Margaret G Filbert; ARMY MEDICAL RESEARCH INST OF CHEMICAL DEFENSE ABERDEEN PROVING GROUND MD
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| Soman is a nerve-agent that produces seizures and seizure-related brain damage (SRBD). It is well known that termination of soman-induced seizures, using anticonvulsant drug therapy, would be the ideal means of preventing SRBD. However, these seizures quickly develop into status epilepticus and become refractory to anticonvulsant therapy shortly after their onset. Medical care for some battlefield casualties will likely be delayed beyond the therapeutic window of opportunity to terminate soman-induced ... |
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| Manufacturing the Future: Federal Priorities for Manufacturing Research and Development. Report of the Interagency Working Group on Manufacturing R&D, Committee on Technology, National Science and Technology Council |
01-Mar-2008 |
103 pages |
| Authors:
Celia Merzbacher; Richard Russell; Jason Boehm; Dale Hall; David Stieren; Susan Skemp; NATIONAL SCIENCE AND TECHNOLOGY COUNCIL WASHINGTON DC COMMITTEE ON TECHNOLOGY
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| This report of the Interagency Working Group (IWG) on Manufacturing Research and Development (R&D) outlines three areas of opportunity for manufacturing R&D and describes critical manufacturing technology issues that need to be addressed in each area in order to make progress. areas are (1) manufacturing for the hydrogen economy; (2) nanomanufacturing; and (3) intelligent and integrated manufacturing. The report also describes Federal activities in the three areas and current and ... |
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| Particle Size Distributions During Diffusion Controlled Growth and Coarsening (Preprint) |
Feb-2008 |
11 pages |
| Authors:
Oleg N Senkov; UES INC DAYTON OH
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| The chemical partitioning of alloying elements between the disordered y and ordered y-prime phases in the nickel base superalloy Rene 88DT, has been characterized in detail using three dimensional atom probe tomography (3DAP) coupled with energy-filtered transmission electron microscopy studies. After a homogenization treatment followed by a water quench, it is observed that the morphology of the y-prime precipitates remains near-spherical even after long aging times. Compositional variation, observed between ... |
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| Progress in Orientation-Patterned GAAS for Next-Generation Nonlinear Optical Devices (Postprint) |
Feb-2008 |
13 pages |
| Authors:
David Bliss; Candace Lynch; Rita D Peterson; David H Tomich; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH ELECTRO OPTICAL COUNTERMEASURES
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| Orientation-patterned GaAs (OPGaAs) shows great promise as a nonlinear optical material for frequency conversion in the 2-5 micron and 8-12 micron regions. We report recent progress in each of the three main areas of OPGaAs development: fabrication of patterned templates using a combination of wafer bonding and MBE techniques; thick-layer HVPE growth; and material and OPO device characterization. This work has led to significant improvements in material quality, specifically reduced ... |
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| Advanced Thermally Stable Coal-Based Jet Fuels |
Jan-2008 |
14 pages |
| Authors:
Harold Schobert; Bruce Beaver; Andre Boehman; Caroline Clifford; Dominic Santavicca; Robert Santoro; Geoffrey Wilson; PENNSYLVANIA STATE UNIV UNIVERSITY PARK COAL UTILIZATION CENTER
|
| The contract year represented a no-cost extension on the original contract. Work was continued on the use of solvent extraction of coal to produce a material suitable for further hydrotreating to the coal-based JP-8 fuel. This switch to solvent extraction instead of relying on the refined chemical oil used previously i in full agreement with recommendations provided by RAND. Exploratory work was begun to evaluate the possible production of nuclear ... |
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| The Role of NAD+ Depletion in the Mechanisms of Sulfur Mustard-Induced Metabolic Injury |
Jan-2008 |
14 pages |
| Authors:
Margaret E Martens; William J Smith; ARMY MEDICAL RESEARCH INST OF CHEMICAL DEFENSE ABERDEEN PROVING GROUND MD
|
| Results of our previous studies on the chemical warfare agent sulfur mustard (2,2'-dichlorodiethyl sulfide) suggested that mustard-induced inhibition of glycolysis is not solely a function of NAD+ depletion. To define the role of NAD+ in mustard-induced metabolic injury, we examined the effects of mustard +/- niacinamide on energy metabolism in cultured human keratinocytes. Sulfur mustard caused concentration-dependent decreases in viable cell number and ATP content at 24 hours, but not ... |
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| Advances in SiGeSn Technology |
01-Dec-2007 |
16 pages |
| Authors:
Jose Menendez; John Kouvetakis; Richard A Soref; John Tolle; Vijay D'Costa; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE/ELECTROMAGNETICS TECHNOLOGY DIV
|
| We recently reported the CVD growth of binary Ge(1-y)Sn(y) and ternary Ge(1-y)Si(x)Sn(y) alloys directly on Si wafers using SnD(4), Ge(2)H(6) (di-germane), SiH(3)GeH(3), and (GeH(3))(2)SiH(2) sources. Ge(y)Sn(y) is an intriguing infrared material that undergoes an indirect-to-direct bandgap transition for y < 0.1. In addition, we have found that Ge(1-y)Sn(y) layers have ideal properties as templates for the subsequent deposition of other semiconductors: (a) they are strain-relaxed and have low threading-defect densities ... |
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| A Methodological Approach for Conducting a Business Case Analysis (BCA) of the Global Observer Joint Capability Technology Demonstration (JCTD) |
DEC 2007 |
87 pages |
| Authors:
Thiow Y. Dennis; Lim; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Global Observer is a Joint Capability Technology Demonstration (JCTD) initiative that is being managed by the United States Special Operations Command (US SOCOM). The JCTD Program seeks to accelerate the development and operational evaluation of mature advanced technologies to rapidly transition the new capability to military operations. The Global Observer is a liquid-hydrogen powered unmanned aircraft system that has been designed for deployment as a stratospheric satellite. It will ... |
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| Platinum Complexes with Optical Limiting and Related Non-linear Optical and Electronic Properties |
NOV 2007 |
6 pages |
| Authors:
Michael Bruce; ADELAIDE UNIV (AUSTRALIA) DEPT OF CHEMISTRY
|
| This project consisted of applying several synthetic approaches, some derived from model studies of molecular wires, to the production of several novel types of platinum-alkynyl complexes. |
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| Characterization of Chemical Weapons Convention Schedule 3 Compounds by Quantitative 13C NMR Spectroscopy |
NOV 2007 |
26 pages |
| Authors:
Terry J. Henderson; David B. Cullinan; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
|
| A quantitative 13C NMR method has been developed for characterizing hydrogen cyanide, cyanogen chloride, and phosgene, three Chemical Weapons Convention Schedule 3 compounds in common use today. Towards this end, the 13C spin-lattice relaxation behavior (T1) of the compounds has been assessed at 75 and 126 MMz for temperatures between 5-15 deg C, holding them in their liquid states to dramatically improve detection sensitivity. The derived single exponential T1 values ... |
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| Polymer Based Highly Parallel Nanoscopic Sensors for Rapid Detection of Chemical and Biological Threats |
18 SEP 2007 |
33 pages |
| Authors:
Ryan Giedd; Matt Curry; Xuliang Han; SOUTHWEST MISSOURI STATE UNIV SPRINGFIELD CENTER FOR APPLIED SCIENCE AND ENGINEERING
|
| Raw carbon nanotubes (CNTs) contain a wide range of impurities from the growth process. At Brewer Science an effective post-growth purification procedure was developed to reduce the amount of impurities, and several characterization techniques were developed and validated. |
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| Plasma-Arc Deposited Elemental Boron Film for use as a Durable Nonstick Coating |
SEP 2007 |
27 pages |
| Authors:
C. C. Klepper; HY-TECH RESEARCH CORP RADFORD VA
|
| Report developed under Small Business Innovation Research Contract. Under this Phase I SBIR contract, HY-Tech Research performed development of an abrasion resistant, non-stick coating for cookware used by the U.S. Army in the field. The deposition technique uses a vacuum arc source of elemental boron, a high-temperature material with excellent hardness, lubricity and chemical inertness. HY-Tech's boron arc source is based on the vacuum (cathodic) arc process, which produces the ... |
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| Surface Analysis of Reactive Ion Etched PZT Thin Films in SF6 Plasma |
SEP 2007 |
16 pages |
| Authors:
Eugene Zakar; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| Reactive ion etching of sol-gel deposited Pb(Zr(0.52) Ti(0.48)03 thin films was performed in SF6 plasmas. Etch rate was determined as a function of cathode power and chamber pressure, attaining a value of 65 nm/min at 300 W. Auger electron spectroscopy measurements revealed an excess Pb 10 nm thin layer on as-deposited film surfaces. X -ray photoelectron spectroscopy measurements showed the existence of ZrF4 and PbS04 species on etched surfaces, in ... |
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| Growth and Characterization of Carbon Nanotubes on Constantan (Cu-Ni-Mn Alloy) Metallic Substrates Without Adding Additional Catalysts |
Jul-2007 |
6 pages |
| Authors:
J Burke; L Brunke; J Bulmer; J Baca; K Yost; P Barnes; C V Varanasi; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
| In this study, metallic constantan (Cu55-Ni44-Mn1 wt %) alloy substrates were investigated as an alternate choice of substrates to grow carbon nanotubes (CNTs). No additional catalysts were used other than the as-rolled and annealed substrates to process CNTs on them. High density CNT growth was observed to take place on these substrates when suitable conditions were used in a thermal chemical vapor deposition (CVD) furnace with C2H2 as the carbon ... |
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| Influence of Geometry on a High Surface Area-Solid Phase Microextraction Sampler for Chemical Vapor Collection |
04 JUN 2007 |
76 pages |
| Authors:
Robbie L. Wheeler; UNIFORMED SERVICES UNIV OF THE HEALTH SCIENCES BETHESDA MD DEPT OF PREVENTIVE MEDICINE AND BIOMETRICS
|
| The High Surface Area Solid Phase Microextraction "HSA-SPME" device is an internally heated sampling device designed for high-volume, trace level air sampling. This study compared the analyte extraction and durability of five different HSA-SPME geometric configurations at two sample flow rates. Each HSA-SPME configuration was tested for its ability to extract a 10 ppbv 39-component gas mixture and thermally desorb into an analytical instrument. Differences in analyte recovery between the ... |
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| Desktop Systems for Manufacturing Carbon Nanotube Films by Chemical Vapor Deposition |
Jun-2007 |
148 pages |
| Authors:
David S Kuhn; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Carbon nanotubes (CNTs) exhibit exceptional electrical, thermal, and mechanical properties that could potentially transform such diverse fields as composites, electronics, cooling, energy storage, and biological sensing. For the United States Navy, composites potentially provide a significant decrease in lifetime maintenance costs of ships by eliminating hull corrosion. A stronger composite could also improve naval ship survivability or increase combat payloads by reducing the hull weight of ships and submarines. Further, ... |
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| Lotus LADM Based Self-Decontaminating Surfaces |
01 MAY 2007 |
48 pages |
| Authors:
John L. Lombardi; Stephen Michielsen; Robert Connors; Gordon Churchward; VENTANA RESEARCH TUCSON AZ
|
| Recent events have lead to new concerns about biowarfare, bioterrorism, chemical warfare and chemical terrorism. Because of the potential range of agents that could be used, a non-specific decontamination system is desirable. Of particular interest are materials whose surfaces have been modified to be self-decontaminating and self-regenerating. Other beneficial attributes are that the surfaces be self-cleaning and very light weight. We have developed superhydrophobic coating materials. We have also developed ... |
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| Effect of Al Addition on Glass Forming Stability of Ca-Mg-Zn-Cu Based Bulk Metallic Glasses (PREPRINT) |
APR 2007 |
21 pages |
| Authors:
O. N. Senkov; J. M. Scott; Daniel B. Miracle; UES INC DAYTON OH
|
| The effect of Al addition on glass forming ability and glass stability of Ca-Mg-Zn, Ca-Mg-Cu, and Ca-Mg-Zn-Cu alloys was studied. The glassy alloys were produced by a copper mold casting method as wedge-shaped samples with thicknesses varying from 0.5 mm to 10 mm. Thermal properties, such as the glass transition, crystallization and melting temperatures, as well as heats of crystallization and melting, were determined for the produced glasses. Partial substitution ... |
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| Large Scale Green Synthesis of 1,2,4-Butanetriol |
31 MAR 2007 |
20 pages |
| Authors:
Christopher Saffron; John W. Frost; MICHIGAN BIOTECHNOLOGY INST LANSING MI
|
| Escherichia coli W3110 was successfully modified to produce D-1,2,4-butanetriol (D-BT) in concentrations exceeding 10 g/L by conversion of D-xylose. The modified strain, E. coli WN13, was scaled from 1 L (bench scale) to 100 L (pilot scale) fermentor working volumes at MBI International. D-BT was isolated from fermentation broth by a succession of downstream unit operations, including: filtration, ion exchange, evaporation and distillation. Five-hundred milliliters of D-BT was collected and ... |
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| Vertical Alignment of Single-Walled Carbon Nanotubes on Nanostructure Fabricated by Atomic Force Microscope |
30 MAR 2007 |
46 pages |
| Authors:
Haiwon Lee; HANYANG UNIV SEOUL (KOREA SOUTH) DEPT OF CHEMISTRY
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| This project focused on the behavior of single-wall carbon nanotubes (SWCNTs) in the electrophoresis cells and aligned growth of SWCNTs by thermal chemical vapor deposition on selectively deposited metallic nanoparticles. Field emission characteristics of vertically aligned SWCNTs films were also studied. |
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| Fabrication of Organic Thin Film Transistors Using Layer-By-Layer Assembly (Preprint) |
MAR 2007 |
27 pages |
| Authors:
Jeffery T. Stricker; Anna D. Gudmundsdottir; Adam P. Smith; Barney E. Taylor; Michael F. Durstock; CINCINNATI UNIV OH
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| Layer-by-layer assembly is presented as a deposition technique for the incorporation of ultra-thin gate dielectric layers into thin-film transistors utilizing a highly doped organic active layer. This deposition technique enables the fabrication of device structures with a controllable gate dielectric thickness. In particular, devices with a dielectric layer comprised of poly(allylamine hydrochloride)/poly(acrylic acid) (PAH/PAA) bilayer films were fabricated to examine the properties of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as the transistor active ... |
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| Negative Thermal Expansion in Ultrathin Plasma Polymerized Films (Postprint) |
MAR 2007 |
6 pages |
| Authors:
Srikanth Singamaneni; Melburne C. LeMieux; Hao Jian; Timothy J. Bunning; Vladimir V. Tsukruk; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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| Because of the increasing applications of polymer films with nanoscale thickness, it is imperative to fully characterize the physical properties in these films, which could be significantly different from the bulk properties due to the surface and interfacial effects. Interactions with the substrate and high specific surface area (film/air and film/substrate) can cause peculiar properties of the ultrathin polymer films. In a recent study the glass transition of a free ... |
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| NMR Studies of Micro-Structured and Nano-Structured Polymeric Membrane Systems |
27 FEB 2007 |
8 pages |
| Authors:
Guoxing Lin; CLARK UNIV WORCESTER MA DEPT OF CHEMISTRY
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| This report describes our achievement in the investigation of the influence of structure on diffusion in styrene-ethylene/ butylene-styrene triblock copolymers (SEBS) during the period of June 1, 2006 to November 30, 2006. This type of triblock copolymers has the potential for chemical protection and fuel cell application. Our progress is made in the following fields: (I) Pulse-field- gradient (PFG) Nuclear Magnetic Resonance (NMR) study of the translational diffusion; (II) lattice ... |
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| Dilute-Nitride Type-II Quantum Well Lasers Grown by MOCVD |
25 FEB 2007 |
31 pages |
| Authors:
Luke J. Mawst; WISCONSIN UNIV-MADISON
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| One challenging goal remaining for GaAs-based InGaAsN QW lasers is to extend the emission wavelength beyond 1.3 m, while maintaining optical material quality for the realization of longer wavelength and high performance. Higher N-content leads to increased nonradiative monomolecular recombination, thus high performance at 1.55 m has not been achieved to date. Recently, we proposed a novel approach for realizing GaAs-based diode lasers with emission wavelengths beyond =1500 nm. This ... |
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Industrial Chemistry and Chemical Processing
