| Molecular Layer Deposition of Hybrid Organic-Inorganic Alucone Polymer Films Using a Three-Step ABC Reaction Sequence |
02-Nov-2009 |
11 pages |
| Authors:
Steven M George; Byunghoon Yoon; Dragos Seghete; Andrew S Cavanagh; COLORADO UNIV AT BOULDER
|
 | Thin film growth using molecular layer deposition (MLD) or atomic layer deposition (ALD) is based on sequential, self-limiting surface reactions. In this work, MLD is used to grow a hybrid organic-inorganic polymer film based on a three-step ABC reaction sequence using trimethylaluminum (TMA), ethanolamine (EA), and maleic anhydride (MA) as the reactants. This three-step ABC sequence avoids the use of homobifunctional organic precursors by employing a homotrifunctional inorganic reactant (TMA), ... |
|
| Contacts to Semiconductor Nanowires |
03-Oct-2009 |
17 pages |
| Authors:
S E Mohney; PENNSYLVANIA STATE UNIV UNIVERSITY PARK OFFICE OF SPONSORED PROGRAMS
|
| Metal contacts to semiconductor nanowires share similarities with their thin-film counterparts, but they also exhibit important differences due to geometry. For example, in the formation of platinum silicide contacts to silicon nanowires, it is possible to achieve uniform platinum silicide/silicon segmented nanowires, but some ratios of platinum to silicon and annealing conditions lead to a peculiar kinking of the nanowires not analogous to the thin-film case. Also interesting is the ... |
|
| Application of Copper Indium Gallium Diselenide Photovoltaic Cells to Extend the Endurance and Capabilities of Unmanned Aerial Vehicles |
Sep-2009 |
150 pages |
| Authors:
William R Hurd; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In this thesis, we investigate the advantages of modifying current military Unmanned Aerial Vehicles (UAV) with available thin-film photovoltaic (PV) cells to increase their endurance, and/or capabilities. The approach taken was to explore available off-the-shelf flexible solar technology and to integrate it in a proof-of-concept model for testing and analysis. A physically similar commercially available battery powered plane was used to demonstrate the materials and methods by which the RQ-11B ... |
|
| Electronic Structure in Thin Film Organic Semiconductors |
27-Jun-2009 |
9 pages |
| Authors:
Kevin E Smith; BOSTON UNIV MA
|
| Despite the technological and scientific importance of semiconducting organic materials, there have been few studies of their valence band electronic structure using modern synchrotron radiation-based spectroscopic methods. The combination of high resolution soft x-ray emission, soft x-ray absorption, and high resolution photoemission spectroscopy was used in this program to measure the detailed electronic structure of a selection of organic semiconductor thin films. The films were grown in a custom built ... |
|
| Understanding the Plasma-Propellant Interaction through Experimental Modeling |
08-May-2009 |
38 pages |
| Authors:
Rik Blumenthal; AUBURN UNIV AL
|
| The goal of the project was to develop an understanding of the plasma-propellant interaction, specifically the ignition of RDX by ETC. Based on experimental results a model of ETC ignition was developed in which ignition occurs through a process that resembles that of a primary explosive more than a secondary explosive. In this process, hydrogen ions in the ETC igniter plasma implant into the RDX surface are rapidly neutralized. The ... |
|
| New Magnetic Materials and Phenomena for Radar and Microwave Signal Processing Devices - Bulk and Thin Film Ferrites and Metallic Films |
15-Feb-2009 |
38 pages |
| Authors:
Carl E Patton; COLORADO STATE UNIV FORT COLLINS DEPT OF PHYSICS
|
| ONR Grant ONR N00014-07-1-0597 has supported a four phase program. Under Phase (1), there were three materials thrusts, (a) hybrid pulse laser deposited and liquid phase epitaxy films of low loss cubic yttrium iron garnet (YIG) and uniaxial barium hexaferrite, (b) bulk and thick film ultra-dense fine grain pol) crystalline YIG materials, and (c) high magnetization metallic films, notably of Permalloy, iron, and FeTiN. Under Phase (2), the focus was ... |
|
| Plasma-Based Surface Modification and Corrosion in High Temperature Environments |
05-Feb-2009 |
19 pages |
| Authors:
Todd Allen; Lizhen Tan; Kumar Sridharan; WISCONSIN UNIV-MADISON
|
| * Corrosion research at the University of Wisconsin is focused on two areas (i) plasma-based surface treatments to reduce corrosion, (ii) high temperature corrosion in harsh environments. * Plasma-based surface treatments (10 to 2000nm depth) have involved ion implantation and thin film deposition and atomic mixing approaches to mitigate corrosion and wear. * Specific testing equipment for corrosion testing in high temperatures and harsh environments such as supercritical water, molten ... |
|
| Characterization and Improvements to Porous Silicon Processing for Nanoenergetics |
Feb-2009 |
20 pages |
| Authors:
Luke Currano; Collin Becker; Wayne Churaman; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| Nano-porous silicon offers a large surface area to volume ratio typical of nano materials and contains a network of pores that can be filled with oxidant. When a silicon fuel source is combined with an oxidant on the nano-scale, kinetic limitations of silicon oxidation are overcome and an explosive reaction is realized. We present a characterization of lightly doped p-type silicon for nanoenergetic porous silicon (PS) applications. Using gas adsorption ... |
|
| Single-Molecule Luminescence and High Efficiency Photovoltaic Cells Based on Percolated Conducting Carbon Nanotubes Scaffolds Templated with Light-Harvesting Conjugated Polymers and Nanohybrids |
14-Jan-2009 |
63 pages |
| Authors:
Arnold C Yang; NATIONAL TSING HUA UNIV HSINCHU (TAIWAN) DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| This project describes the successful preparation of the novel photoelectric material poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene)-grafted multiwall carbon nanotubes(MWCNTs) and some of this material's photoelectric properties. Nanocomposites constructed by surface-grafted multiwall carbon nanotubes (CNTs) with conjugated polymers dispersed in a polymer matrix were synthesized to form novel optoelectronic materials that exploit single-molecule effects. During the course of the execution of the proposal, research work was focused on three parts: 1. the synthesis work ... |
|
| Synthesis and Characterization of BaFeO3, (Ba,Bi)FeO3, and Related Epitaxial Thin Films and Nanostructures |
Jan-2009 |
116 pages |
| Authors:
David P Norton; FLORIDA UNIV GAINESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| There is significant interest in identifying and manipulating new materials that have unique magnetic, dielectric, and transport properties. Single phase and artificially structured materials for which more that one electromagnetic functionality coexists are particularly interesting. In this project, the synthesis of epitaxial thin films and multilayered structure with potential to display these attributed were examined. |
|
| Threshold Voltage Instability in A-Si:H TFTS and the Implications for Flexible Displays and Circuits |
Dec-2008 |
9 pages |
| Authors:
Z Li; E Forsythe; G Raupp; K Baugh; E Bawolek; N Darbanian; S Venugopal; R Shringarpure; L Clark; D Allee; D Morton; ARIZONA STATE UNIV TEMPE
|
| After a brief review of the characteristics of electrical stress degradation of flexible, amorphous silicon thin film transistors, the implications for various types of flexible circuitry including active matrix backplanes, integrated drivers and general purpose digital circuitry are examined. A circuit modeling tool that enables the prediction of complex circuit degradation is presented. Experimental results for a variety of flexible digital circuits including programmable logic arrays and memories are presented. ... |
|
| Piezomems Devices for Advanced Communications and Phased Array Radar |
Dec-2008 |
5 pages |
| Authors:
Daniel Judy; Ronald G Polcawich; Jeffrey S Pulskamp; ARMY RESEARCH LAB ADELPHI MD SCIENCES AND ELECTRON DEVICES DIRECTORATE
|
| In this article, we report on the successful demonstration of lead zirconate titanate (PZT) thin film based MEMS devices for use in radio frequency (RF) systems. Individual series switches and single pole multi-throw switching elements operating at or below 10 V have been developed capable of operating over a wide temperature range. The switch technology also provides an enabling technology for low voltage, mechanical logic. Along with switches and phase ... |
|
| Advanced Catalysis Technologies: Lanthanum Cerium Manganese Hexaaluminate Combustion Catalysts for Flat Plate Reactor for Compact Steam Reformers |
Dec-2008 |
40 pages |
| Authors:
Aly H Shaaban; APPLIED RESEARCH ASSOCIATES INC TYNDALL AFB FL
|
| This effort investigated the impact of thin film coated catalyst on fuel reforming, developed a substituted hexaaluminate combustion catalyst, and investigated its application in a compact steam reformer. Thin film coated catalyst impact on fuel reforming was investigated using catalytic cracking process. Two cracking catalysts and three reactor configurations were used to investigate both packed-bed and thin film catalyst coated reactors. For the combustion catalyst development, several substituted hexaaluminates were ... |
|
| Ultra-Sensitive Biological Detection via Nanoparticle-Based Magnetically Amplified Surface Plasmon Resonance (Mag-SPR) Techniques |
08-Oct-2008 |
61 pages |
| Authors:
Jinwoo Cheon; Jong Kim; H T Hahn; Donghoon Choi; Kunhong Lee; A P Alivisatos; A J Steckl; Sang-gi Lee; YONSEI UNIV SEOUL (REPUBLIC OF KOREA)
|
| The report contains final reports from four separate projects co-funded by AFOSR/AOARD and Korean MEST. The four projects were (1) Ultra-Sensitive Biological Detection via Nanoparticle-Based Magnetically Amplified Surface Plasmon Resonance (Mag-SPR) Techniques; (2) Electronic, Photonic and Magnetic Properties of Natural and Modified DNA Complexes with Heavy Metals Ions; (3) Hierarchical Carbon Fiber Composites; and (4) Distributed Detection of Attacks/Intrusions and Prevention of Resource-Starvation Attacks in Mobile Ad Hoc Networks. |
|
| Extremely Low Noise Carbon Nanotubes for Peltier and Photo-Detector Device Applications |
08-Oct-2008 |
44 pages |
| Authors:
Soo-Young Park; Hongkun Park; Young H Lee; Moon-Ho Jo; Ki-Bum Kim; Moon J Kim; Sungho Jin; SUNGKYUNK UNIV SUWON (SOUTH KOREA)
|
| The report contains final reports from four separate projects co-funded by AFOSR/AOARD and Korean MEST. The four projects were 1) High-Resolution, Larger-Area Nanoimprint Lithography Using Crystalline Lattice Images and Electron-Emitting Nanoprobes; 2) Extremely Low Noise Carbon Nanotubes for Peltier and Photo-detector Device Applications; 3) SiGe Alloy Nanowire Photonics; and 4) Self-Assembled Liquid Crystalline Gels: From Nanostructure to Function. |
|
| Hypermixer Pylon Fuel Injection for Scramjet Combustors |
11-Sep-2008 |
188 pages |
| Authors:
Jason C Doster; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Fueling the core airflow of a circular or elliptical scramjet combustor cross-section often requires intrusive geometries. Intrusive geometries can distribute the fuel evenly across the combustor cross-section and act as a flameholder for the fuel/air mixture. Compared to conventional transverse or angled wall injection, intrusive geometries allow easier penetration into the core combustor airflow and reduced fuel injection pressures. The design and testing of an intrusive pylon geometry for scramjet ... |
|
| Continuum Modeling of Elastic Dielectric Solids with Defects, with Application to Barium Strontium Titanate Thin Films |
01-Sep-2008 |
8 pages |
| Authors:
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| A model is developed for the electromechanical behaviour of dielectric crystals with defects: dislocations, vacancies, and misoriented boundaries. A geometric framework describes the deformation of the lattice in the presence of such defects. Thermodynamic and kinetic relations are formulated, the latter enabling description of diffusion of charged vacancies and mass rearrangement at free surfaces. Analytical and numerical solutions of specific problems offer insight into performance of barium strontium titanate (BST) ... |
|
| Modeling of Electroresistive and Magnetoelectric Oxide Heterostructures |
Sep-2008 |
3 pages |
| Authors:
Evgeny Tsymbal; NEBRASKA UNIV LINCOLN DEPT OF PHYSICS AND ASTRONOMY
|
| Using first-principles calculations we have predicted new functional properties of oxide ferroic heterostructures. One class of heterostructures utilizes an ultrathin ferroelectric film serving as a barrier between two metal electrodes which makes a ferroelectric tunnel junction (FTJ). The electric-field-induced polarization reversal of the ferroelectric is predicted to have a profound effect on the conductance of the junction leading to a new kind of electroresistive switches. Another class of devices extends ... |
|
| Design and Fabrication of Microheaters for Localized Carbon Nanotube Growth |
Aug-2008 |
5 pages |
| Authors:
Y Zhou; J Johnson; L Wu; S Maley; A Ural; H Xie; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| This paper presents a reliable method for the growth of single-walled carbon nanotubes (SWNTs) at room temperature by using localized heating. A surface micromachining technique is used to create suspended microstructures for good thermal isolation. Pt resistors are integrated as the heating source, and the local growth temperature and electrical field can be controlled by the heater geometry and applied voltage. Growth of aligned nanotubes with diameters ranging from 1-10 ... |
|
| Modulation of Coulomb Blockade Behavior of Room Temperature Operational Single Electron Transistors by Tunnel Junction |
Aug-2008 |
5 pages |
| Authors:
P S Karre; Aditya Kapoor; Govind Mallick ;Shashi P Karna; Paul L Bergstrom; MICHIGAN TECHNOLOGICAL UNIV HOUGHTON DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The effect of tunneling oxide thickness on the Coulomb blockade behavior of a room temperature operating multi dot Single Electron Transistors (SET) was investigated. Our room temperature operational SETs, fabricated from focused ion beam deposited tungsten nano-islands, clearly show the modulation of Coulomb Blockade voltage with the change in the tunnel oxide thickness. The Coulomb blockade voltage of the device was increased from 2.0 V to 5.0 V by the ... |
|
| Enzyme, Antibody, and Photocatalytically Active Nanoscale Scavengers and Sensors for CW and Biological Agents |
10-Jun-2008 |
9 pages |
| Authors:
Yates; John T Jr; Alan Russell; PITTSBURGH UNIV PA
|
| Thin films consisting of photoactive TiO2 and enzyme-functionalized polymer were studied for their activity against chemical agent simulants. The photochemistry of TiO2 was quantitatively studied for several molecules, including the activation of molecular oxygen which then oxidizes organic molecules. An important discovery is that the rate of the photoprocess is proportional to the square root of the ultraviolet light flux. The enzyme functionalized polymer films were produced to incorporate an ... |
|
| Symposium I: Nanoscale Magnetic Materials and Applications. Held in Boston, Massachusetts on November 25-30, 2007 |
JUN 2008 |
55 pages |
| Authors:
J. P. Liu; MATERIALS RESEARCH SOCIETY WARRENDALE PA
|
| Nanostructured magnets share many of the basic principles as for other nanostructured materials such as geometric confinement, physical proximity, and chemical self organization. These principles are illustrated by means of several examples drawn from the quests for ultrastrong permanent magnets, ultrahigh-density magnetic information storage, and biomedical applications. This symposium addresses the challenges and scientific problems in magnetic nanostructures, from the fundamental issues to fabrication and applications. This symposium has provided ... |
|
| Bio-Inspired Sensing and Imaging of Polarization Information in Nature |
04 MAY 2008 |
61 pages |
| Authors:
Nader Engheta; Jr. Pugh Edward N.; Jan Van der Spiegel; PENNSYLVANIA UNIV PHILADELPHIA DEPT OF ELECTRICAL AND SYSTEMS ENGINEERING
|
| Our unaided eyes can detect two of the characteristics of image-forming visible light from a scene, namely, the intensity and the wavelength, which can then be encoded into perceptual qualities of brightness and color. Our eyes, however, are effectively blind to the third characteristic of light, its polarization. It is well known, however, that several species of animals have visual systems capable of detecting light's polarization and using the information ... |
|
| (QC Themes) Type-Two Quantum Computing in PBG-Based Cavities for Efficient Simulation of Lattice Gas Dynamics |
26 APR 2008 |
61 pages |
| Authors:
Selim Shahriar; NORTHWESTERN UNIV EVANSTON IL DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| The key challenge in this project was to realize a high-quality PBG structure in a crystalline thin film of diamond. This task proved to be extremely difficult, due to severe constraints. Significant technical hurdles in the context of lithography have to be overcome before a PBG based QC can be realized in NVD. The most promising approach would be to use the polished single crystal and would require research into ... |
|
| Development of Improved Microwave Dielectric Materials and Devices using Advanced Experimental and Theoretical Methods |
17 APR 2008 |
33 pages |
| Authors:
Nathan Newman; Van Schilfgaarde; ARIZONA STATE UNIV TEMPE DEPT OF ELECTRICAL ENGINEERING
|
| Our work has made important progress towards developing a fundamental understanding of the microscopic mechanism that causes loss in high performance microwave dielectrics, and can explain why some dielectric materials exhibit markedly better performance than others. Ab-initio electronic structure calculations elucidated the physical reason for this desirable microwave properties in Ba(Cd1/3Ta2/3)O3 (BCT) and Ba(Zn1/3Ta2/3)O3 (BZT). The presence of significant charge transfer between cation d-orbitals provides a degree of covalent directional ... |
|
| Nonlinear Microwave Properties of Atomic Layer Controlled HTS Multilayers |
14 APR 2008 |
6 pages |
| Authors:
Chang-Beom Eom; WISCONSIN UNIV-MADISON DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| We have studied the nonlinear microwave response of expitaxial HTS multilayers and single layers thick films in collaboration with Dr. Dan Oates at MIT Lincoln Lab. In order to make highest quality control we have used multi-YBCO target PLD with in situ high pressure RHEED. The nonlinearity of YBCO thick films improves, as increasing the films thickness, and approaches the lowest values ever reported. |
|
| Extending Usable Lifetime of Plasmonic Silver Structures Designed for High Resolution Chemical Imaging and for Chemical and Biological Sensing |
Apr-2008 |
23 pages |
| Authors:
Carlos Barrios; Mark D Foster; AKRON UNIV OH
|
| The overall objective was to identify, from among different classes of coating schemes, the most fruitful approach for extending the lifetime of silver plasmonic structures used in high resolution optical spectroscopies for materials characterization or high sensitivity detection schemes. This enhanced durability will aid in Army efforts to develop high sensitivity, high selectivity schemes based on tip enhanced Raman spectroscopy (TERS) for chemical imaging and surface enhanced Raman spectroscopy (SERS) ... |
|
| Dislocation Core and Cross Slip Properties in Metals and Intermetallics: Linking ab initio and Continuum Approaches |
13-Feb-2008 |
23 pages |
| Authors:
Nicholas G Kioussis; CALIFORNIA STATE UNIV NORTHRIDGE DEPT OF PHYSICS
|
| 1) Developed, tested, and implemented a novel concurrent multiscale approach which improves the coupling-quality between the quantum and the classical atomistic regions. This approach, which allows for the first time the study of the dislocation core structure and the effect of chemistry (impurities) on the dislocation core, was applied successfully to aluminum. 2) Developed and applied a novel sequential multiscale approach which couples ab initio and continuum approaches to study ... |
|
| Improved Thin Film Piezoelectrics for Actuator Applications |
04-Feb-2008 |
14 pages |
| Authors:
Susan Trolier-McKinstry; PENNSYLVANIA STATE UNIV UNIVERSITY PARK OFFICE OF SPONSORED PROGRAMS
|
| Thin film piezoelectrics for microelectromechanical systems offer large motions, often with low hysteresis, high available energy densities, as well as high sensitivity sensors with wide dynamic ranges, and low power requirements. Among ferroelectric films, the majority of the MEMS sensors and actuators developed have utilized lead zirconate titanate (PZT) films as the transducer. Randomly oriented PZT films show piezoelectric e31 ,f coefficients of about - 6 to 7 C/m2 at ... |
|
| Thermal Characterization of Thin Films for MEMS Applications |
FEB 2008 |
20 pages |
| Authors:
David J. Howe; Brian Morgan; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| Thin film dielectrics play an important role in the fabrication and processes involved with microelectromechanical systems (MEMS). Two such dielectrics that are used widely are silicon dioxide (SiO2) and photoresist. As a large portion of these systems use the conduction of heat through SiO2 and photoresist layers, the thermal conductivity of these materials is crucial. In this work, the thermal conductivities of the above mentioned materials were determined using a ... |
|
| Spectroscopic Characterization of Microplasmas |
28 JAN 2008 |
14 pages |
| Authors:
Kunihide Tachibana; KYOTO UNIV (JAPAN)
|
| We have developed a new type of microplasma integrated device with a fabric structure of insulator-coated thin metal wires. It has been proved that the device can be operated at relatively low voltage of a few kV in air and even under water with the help of hydrogen bubbles produced by electrolysis of water. We have performed spectroscopic measurements for characterizing the properties of microplasmas in a single jet and ... |
|
| Imaging Tools and Thin Film Coatings for Corrosion Prevention in Aluminum Alloys |
18 JAN 2008 |
4 pages |
| Authors:
Daniel A. Buttry; WYOMING UNIV LARAMIE DEPT OF CHEMISTRY
|
| The fundamental activities involved use of various imaging techniques to study corrosion processes that occur at metal surfaces. We applied these methods to understand both the anodic and cathodic processes involved in corrosion at Al alloy surfaces, and how those processes are influenced by environmental conditions. The applied activities were development and testing of new corrosion inhibition systems based on blends of thermoplastics and conducting polymers. These blends contain smart ... |
|
| Very High Performance Organic Photonic Devices |
15 JAN 2008 |
82 pages |
| Authors:
Stephen Forrest; PRINCETON UNIV NJ DEPT OF ELECTRICAL ENGINEERING
|
| The objective was to demonstrate very high efficiency, low cost organic solar cells on flexible substrates based on vapor-deposited thin film organic semiconductors. Our goal is to obtain solar power conversion efficiencies of >10% -- a value without precedent in over 30 years of science and engineering targeted at achieving practical organic solar energy conversion devices. A further objective is to demonstrate an electrically pumped organic thin film laser, again ... |
|
| Patterning of Bi2Te3 Polycrystalline Thin-Films on Silicon |
JAN 2008 |
18 pages |
| Authors:
Brian Morgan; Patrick Taylor; ARMY RESEARCH LAB ADELPHI MD
|
| Bi2Te3-based thermoelectric (TE) energy conversion devices are an attractive possibility for recovering usable energy from waste heat. The integration of TE devices on silicon substrates opens the door for new highly integrated systems where micro-electro-mechanical systems (MEMS) heat exchangers and sensor/actuator technology can be leveraged to improve conversion efficiency and system capability. One roadblock on this path is the development of reliable patterning methods for fabricating thin-film TE devices on ... |
|
| Spintronic Nanodevices Defines by Nanolithography |
15 DEC 2007 |
15 pages |
| Authors:
Charles J. O'Connor; NEW ORLEANS UNIV LA
|
| The purpose of this report is to document the results of the complete effort for this project, which was to explore the possibilities of employing nanoparticles, nanostructured thin films, and nanowires in spintronic nanodevice fabrication by using e-beam lithography techniques at AMRl-UNO. |
|
| Silk Polymer Designs for Improved Expression and Processing |
28 OCT 2007 |
5 pages |
| Authors:
David L. Kaplan; TUFTS UNIV MEDFORD MA
|
| Silk fibers formed by insects and spiders are noted for their remarkable mechanical properties as well as their durability and biocompatibility. The exceptional solubility in vivo (20-30% w/v) of these proteins is dictated by both the need to produce solid fibers with a high packing fraction and the high mesogen concentration required for lyotropic liquid crystalline spinning, while also achieving high end mechanical properties for survival (orb webs, cocoons). Combining ... |
|
| High Mobility Conjugated Polymers |
20 OCT 2007 |
|
| Authors:
Samson A. Jenekhe; WASHINGTON UNIV SEATTLE DEPT OF CHEMICAL ENGINEERING
|
 | The performance of all current polymer electronic devices, such as organic field-effect transistors (OFETs), photovoltaic cells, and photodetectors, is limited primarily by the low charge carrier mobilities of current materials. To address this problem this project investigated various polymer semiconductors exhibiting high carrier mobilities and explored their device applications in electronics, optoelectronics, and nanoelectronics. Field-effect electron mobilities as high as 0.1 sq cm/Vs in a spin coated thin films of ... |
|
| Flex Biohybrid Nanomembranes as a Platform for Multifunctional Sensors |
10 OCT 2007 |
11 pages |
| Authors:
Vladimir V. Tsukruk; GEORGIA INST OF TECH ATLANTA SCHOOL OF TEXTILE AND FIBER ENGINEERING
|
| The main focus of current activities was on synthesis of new branched and peptide-containing molecules and further development of sophisticated freely standing membranes with micropatterned structure. We synthesized several new amphiplilic hyperbranched molecules and silver-binding peptide for further incorporation into membrane film. Freely-standing arrays of carbon nanotubes and gold nanoparticles were fabricated as well and their properties tested with micromechanical studies and Raman spectroscopy. Specifically we studied: flexible nanomembranes with ... |
|
| Dispersion and Reinforcement of Nanotubes in High Temperature Polymers for Ultrahigh Strength and Thermally Conductive Nanocomposites |
03 OCT 2007 |
73 pages |
| Authors:
Arnold C. Yang; NATIONAL TSING HUA UNIV HSINCHU (TAIWAN) DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| Fundamental approaches for controlled dispersion of multiwalled carbon nanotubes in polymers and the molecular reinforcement in their nanocomposites were studied to design and fabricate well-dispersed percolated carbon nanotube networks in high temperature polymers. |
|
| Materials Science of High-Temperature Superconducting Coated Conductor Materials |
OCT 2007 |
4 pages |
| Authors:
M. R. Beasley; STANFORD UNIV CA
|
| This program was broadly focused on the materials science of high temperature superconducting coated conductors, which are of potential interest for application in electric power systems of interest to the Air Force. The three main elements of the program were as follows: (1) understanding the basic materials science underlying the deposition of 123 YBCO at the high rates needed for economic manufacture of coated conductors; (2) exploration of variants of ... |
|
| Characterization of Hybrid Devices Based on Molecular Solid/Oxide Semiconductor Hetero-Structures |
19 SEP 2007 |
3 pages |
| Authors:
Changyoung Kim; YONSEI UNIV SEOUL (REPUBLIC OF KOREA)
|
| The work covered development of a semiconductor hetero-structures growth chamber to the existing photoemission chamber to characterize hybrid devices based on molecular solid/oxide structures. The work also investigated on developing optimum growth conditions for the desired Fermi level and work functions for different heterostructures. |
|
| Ultraviolet Electrically Injected Light Sources With Epitaxial ZnO-Based Heterojunctions |
AUG 2007 |
15 pages |
| Authors:
Pallab Bhattacharya; JAMIE PHILLIPS; MICHIGAN UNIV REGENTS ANN ARBOR DIV OF RESEARCH DEVELOPMENT AND ADMINISTRATION
|
| In this effort, significant emphasis was placed on the epitaxial growth and in situ doping of ZnO for optoelectronic devices. The materials research efforts on ZnO have resulted in device-quality material on sapphire substrates for the desired laser diodes, where the eventual material quality improvements necessary for the devices are anticipated for future growth on ZnO substrates. P-type doping of ZnO was demonstrated using nitrogen, though the p-type behavior was ... |
|
| Processing, Properties and Morphology of Optical Limiting Silk Membranes |
11 JUL 2007 |
16 pages |
| Authors:
Darrell Reneker; AKRON UNIV OH
|
| This grant supported the exploratory research in optical limiting silk membranes and coatings to protect DOD sensors from strong IR radiation. |
|
| International Conference: Fundamentals of Laser Assisted Micro- & Nanotechnologies (FLAMN-07). Workshop: Laser Cleaning and Artworks Conservation (LCAC). St. Petersburg, Russia, 25-28 June 2007. Abstracts |
28-Jun-2007 |
165 pages |
| Authors:
SAINT PETERSBURG STATE UNIV OF INFO TECHNOLOGIES MECHANICS AND OPTICS (RUSSIA)
|
| The Final Proceedings for Fundamentals of Laser Assisted Micro & Nanotechnologies, 25 June 2007 - 28 June 2007. Physical fundamentals of laser based microtechnologies, modelling and quantitative analysis. Precision laser microshaping: cutting, drilling etc. Local laser modification of different materials composition and properties. Laser surface microstructuring. Laser melting, welding and soldering of microcomponents including plastics. Pulsed laser deposition including LIFT. Laser based methods of photonics components fabrication. Laser cleaning of ... |
|
| Advanced YBCO-Coated Conductors for Use on Air Platforms (Postprint) |
JUN 2007 |
10 pages |
| Authors:
Paul N. Barnes; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH POWER DIVISION
|
| With progress of the YBCO-coated conductor to longer lengths, application of the conductor is nearing. An overview of a couple of current U.S. Air Force application programs is presented. A discussion is then made of where research and development of the YBCO-coated conductor should progress and examples in the U.S. Air Force program. These areas include magnetic flux pinning in YBCO thin films, reduction of the ac losses experienced in ... |
|
| 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, ... |
|
| Polymer Nanocomposite Thin Film Mirror for the Infrared Region (Preprint) |
MAY 2007 |
17 pages |
| Authors:
N. Mandzy; E. Grulke; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| Thin film metal oxide coatings have been used commercially for electromagnetic filters from the UV to the infra red regions for over half a century. Deposition onto a substrate has typically been accomplished using vapor deposition techniques and more recently sol-gel methods. These coatings provide very good optical performance under abrasion, thermal cycles and variable humidity when applied on substrates with similar thermal and mechanical properties. When conventional metal oxide ... |
|
| Reactive Nanoengineered Coatings |
30 APR 2007 |
9 pages |
| Authors:
Edward L. Cussier; MINNESOTA UNIV MINNEAPOLIS
|
| This project used two strategies to develop barrier coatings 10,000 times less permeable than those currently in existence. The first strategy used aligned impermeable flakes which reduced by roughly a factor of 50 both the permeability and the lag, that is the time before any significant penetration. The second strategy, sacrificial reagents, did not effect the permeability in the steady state limit but increased the lag by a factor of ... |
|
| Symposium on Nano- and Micro-Scale Mechanics of Engineering Materials |
30 APR 2007 |
4 pages |
| Authors:
Yu-Lin Shen; NEW MEXICO UNIV ALBUQUERQUE DEPT OF MECHANICAL ENGINEERING
|
| Amidst the rapid advancement of nano-technologies, the key role played by mechanics and mechanical characterization techniques cannot be overemphasized. Research on experimental, theoretical and computational mechanics enables the bridging of science and technology of all engineering materials and devices. We thus organized this symposium encompassing a broad spectrum of application areas and yet focusing on the mechanics and mechanical characterization at the nano- and micro-scales. The basic venue of the ... |
|
| Synchrotron White Beam X-Ray Topography Characterization of LGX and SXGS Bulk Single Crystals, Thin Films and Piezoelectric Devices |
27 APR 2007 |
60 pages |
| Authors:
Michael Dudley; STATE UNIV OF NEW YORK AT STONY BROOK
|
| This project comprised a program of research aimed at applying the technique of Synchrotron White Beam X-ray Topography (SWBXT), supplemented by the complementary technique of High Resolution Triple-Axis X-ray Diffraction (HRTXD), to the determination of defect and general distortion distributions in novel LGX piezoelectric crystals with a view to enabling improvement in crystal quality and consequently in piezoelectric device performance. The LGX family of compounds, which includes langanite, LGS (La3Ga5SiO14), ... |
|
Reports by Keyword(s)
THIN FILMS
