| Transport Imaging: Developing an Optical Technique to Characterize Bulk Semiconductor Materials for Next Generation Radiation Detectors |
Jun-2009 |
79 pages |
| Authors:
Sarah L Catalano; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
 | Characterization of the mobility-lifetime product is critical to the development of new materials for semiconductor radiation detectors. An optical technique has been developed that allows for the direct determination of the minority carrier diffusion length, drift length, and mobility-lifetime product from a single image of the recombination luminescence in semiconductor materials. Excess carriers are generated using the electron beam in a scanning electron microscope. The charge is then drifted by ... |
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| Rare-Earth Doped Gallium Nitride (GaN)- An Innovative Path Toward Area-scalable Solid-state High Energy Lasers Without Thermal Distortion |
Apr-2009 |
22 pages |
| Authors:
Michael Wraback; Mark Dubinskiy; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| We have demonstrated, for the first time, in situ neodymium (Nd) doping of gallium nitride GaN by plasma-assisted molecular beam epitaxy (PA-MBE). The Nd doping is controlled by the GaN growth conditions and the Nd effusion cell temperature. The Rutherford backscattering spectroscopy (RBS) and secondary ion mass spectrometry (SIMS) data indicated Nd doping as high as 8 at. %, with no evidence of phase segregation identified by x-ray diffraction (XRD) ... |
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| Investigation of Electrical and Optical Properties of Bulk III-V Ternary Semiconductors |
Mar-2009 |
66 pages |
| Authors:
Travis C Gomez; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT/DEPT OF ENGINEERING PHYSICS
|
| Bulk grown III-V ternary semiconductors of In0.08Ga0.92Sb and In0.15Ga0.85As were investigated through Hall-effect and photoluminescence measurements to determine carrier concentration, mobility, sheet resistivity, and luminescence spectrum. In the past, epitaxial layers of ternary compounds have been grown on binary compound substrates, and thus very limited lattice matched ternary alloys were available. Recently, bulk grown ternary substrates have been developed, and it has presented a renewed interest in using these substrates ... |
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| Near Field Scanning Optical Microscopy (NSOM) of Nano Devices |
Dec-2008 |
77 pages |
| Authors:
Chun H Low; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis aims to investigate the optical properties of nano-devices using the technique of Near-Field Scanning Optical Microscopy (NSOM). A unique set-up to perform Atomic Force Microscopy (AFM) and NSOM simultaneously in a scanning electron microscope (SEM) to collect spatially resolved luminescence and image transport on nano-scale structures, particularly nanowires, will allow direct determination of transport parameters, such as minority carrier mobility and diffusion length that are vital to the ... |
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| A Study of the Correlation Between Dislocations and Diffusion Length in In(49)Ga(51)P Solar Cells |
Dec-2008 |
111 pages |
| Authors:
Scott E Williams; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A quantitative, contact-free method for extracting minority carrier diffusion length is used to measure the relatively small variations in diffusion length associated with dislocation bands in mismatched epitaxy in the p-type region of a two dimensional heterostructure of a triple junction (InGaP/GaAs/Ge) solar cell sample. These measurements are taken using the line scan mode of a Scanning Electron Microscope coupled with an optical microscope. This technique allowed the variations in ... |
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| Chirality of Sulforhodamine Dye Molecules Incorporated in DNA Thin Films |
13-Nov-2008 |
4 pages |
| Authors:
K SINGH; A J Steckl; H Spaeth; J Grote; R Naik; CINCINNATI UNIV OH NANOELECTRONICS LAB
|
| Thin films formed from salmon sperm DNA reacted with a cationic surfactant (CTMA-Cl) included up to 25 wt % fluorescent molecule sulforhodamine (SRh). SRh effect on DNA chirality and vice versa was investigated by circular dichroism (CD) spectroscopy. The CD signals at 250-265 nm indicate that DNA chirality was maintained or enhanced. Induced CD (iCD) signal at 580-610 nm indicates that SRh is chiral in DNA/CTMA. iCD signal from both ... |
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| Microscopic Optical Characterization of ZnO Bulk Crystals, Free Standing III-Nitride Substrates and III-V Structures for Non-Linear Optics |
01-Oct-2008 |
95 pages |
| Authors:
J Mass; M Avella; Jimenez; Juan Lopez; A Martin; O Martinez; UNIVERSIDAD DE VALLADOLID (SPAIN)
|
| This report results from a contract tasking Universidad de Valladolid as follows: Objective 1: To study the influence of the growth parameters on the defects and inhomogeneities of ZnO crystals grown by Hydrothermal technique. This technique has the advantage of large bulk crystal production, but presents the possibility of unintentional impurity introduction. Furthermore, the incorporation of impurities is not uniform. This objective will be achieved by the way of: Analysis ... |
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| Characterization of Human Mammary Epithelial Stem Cells |
Oct-2008 |
17 pages |
| Authors:
Peter D Eirew; BRITISH COLUMBIA CANCER AGENCY VANCOUVER
|
| The mammary epithelium of normal adult female mice contains stem cells with extensive in vivo regenerative and self-renewal potential. Analogous cells presumably exist in the mammary glands of adult women, and are candidate targets for the first transforming mutations that lead to the evolution of breast cancer stem cells. The objective of this grant is to develop a robust, quantitative and specific assay for these hypothesized normal human mammary stem ... |
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| Optical Properties of Closely Coupled Dilute Nitride Mid-Infrared InNSb Quantum Dots |
Aug-2008 |
5 pages |
| Authors:
J S Harris; S M Kim; F Hatami; H Yuen; A Chin; P Kung; ALABAMA UNIV TUSCALOOSA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We report the growth and characterization of a new dilute nitride, InNSb quantum dots embedded on both InAs and GaAs substrate. Strain induced, self-assembled quantum dots are grown using solid-source molecular beam epitaxy. For improved growth control, we developed a growth technique similar to atomic layer epitaxial methods. Nitrogen incorporation during formation of quantum dots changes surface energy barrier and causes anisotropic distribution of strain energy, results in formation of ... |
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| Silicon Nanostructures, Excitonic Interactions, Laser Consequences |
11-Jul-2008 |
7 pages |
| Authors:
Jimmy Xu; BROWN UNIV PROVIDENCE RI DEPT OF PHYSICS
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| Optically pumped laser emission is achieved at cryogenic temperatures (<85K) on carbon-implanted nano-patterned silicon-on-insulator. By using ion-implantation and solid-phase-epitaxy for recrystallization, a 30x improvement in the luminescence intensity of silicon is reported. Nano-patterning was achieved though reactive-ion-etching using an anodized aluminum oxide membrane as mask. The results described here lay a solid foundation for the next phase of development aimed at achieving room-temperature lasing in silicon. |
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| In-Situ Optical Imaging of Carrier Transport in Multilayer Solar Cells |
01-Jun-2008 |
59 pages |
| Authors:
Brian C Rauscher; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The goal of this thesis is to explore the utility of in-situ optical imaging of charge transport imaging in multi junction solar cells. An in-situ measurement of a manufactured solar cell's key material parameters is difficult. Many sophisticated models may be used to predict performance of new cell arrangements and suggest next generation improvements. In parallel an experimental view into a complex multi layered alloyed semiconductor device can provide important ... |
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| Benchtop Insensitivity: First Steps with Shocked PETN |
JAN 2008 |
22 pages |
| Authors:
William K. Lewis; Mario E. Fajardo; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
|
| "Insensitive Munitions (IM) are conventional weapons and ordnance that fulfill their performance objectives while minimizing collateral damage if exposed to stimuli including fires, impact and shock threats." "The statutory requirement for IM is set forth in U.S. Code, Title 10, Subtitle A, Part IV, chapter 141, Section 2389..." ... Department of Defense Acquisition Manager's Handbook for Insensitive Munitions, Jan 2004, Rev 1. |
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| Development of a Mouse Model for Prostate Cancer Imaging and Study of Disease Progression |
Jan-2008 |
9 pages |
| Authors:
Isla Garraway; CALIFORNIA UNIV LOS ANGELES
|
| Prostate carcinogenesis is a multi-step process resulting in the transformation of prostatic epithelial cells into invasive carcinoma and metastasis. In recent years, mouse models have emerged that recapitulate salient features of prostate carcinogenesis found in human disease. These models illuminate the molecular events that result in transformation and disease progression. In addition, mouse models can be used to identify molecular targets and test chemotherapeutic agents that may alter the course ... |
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| Transport Imaging for the Study of Nanowires and Related Nanostructures |
DEC 2007 |
105 pages |
| Authors:
Ang G. Hwee; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The goals of this thesis are to demonstrate the operation of a near-field scanning microscope (NSOM) inside a scanning electron microscope (SEM) to collect spatially resolved luminescence and to image transport on nano-scale structures particularly nanowires. The SEM is used to generate localized charge and the NSOM is used to observe the motion of the excess charge due to diffusion and/or drift via its recombination emission. This will allow direct ... |
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| Inverse Analysis of Cavitation Impact Phenomena on Structures |
02 JUL 2007 |
32 pages |
| Authors:
S. G. Lambrakos; N. E. Tran; NAVAL RESEARCH LAB WASHINGTON DC
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| A general methodology is presented for in situ detection of cavitation impact phenomena on structures based on inverse analysis of luminescent emissions resulting from the collapsing of bubbles onto surfaces. Following an inverse-analysis approach, luminescent emission signatures are correlated with the general structure of asymmetric bubble collapse onto a surface. This method suggests applications for detection of cavitation that can occur within different types of dynamic water environments of structures. ... |
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| Observation and Study of Dislocation Etch Pits in Molecular Beam Epitaxy Grown Gallium Nitride With the Use of Phosphoric Acid and Molten Potassium Hydroxide |
JUN 2007 |
18 pages |
| Authors:
Fred Semendy; Unchul Lee; ARMY RESEARCH LAB ADELPHI MD
|
| Defects continue to challenge the functionality and reliability gallium nitride (GaN)-based devices. GaN grown on sapphire by molecular beam epitaxy was investigated by wet etching in hot phosphoric acid (H3PO4) and molten potassium hydroxide (KOH). Hexagonally shaped etch pits were formed on the etched sample surfaces. Etched samples were characterized with the use of atomic force microscopy (AFM) and scanning electron microscopy (SEM) and SEM cathode luminescence (SEM-CL). AFM images ... |
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| Development of a Mouse Model for Prostate Cancer Imaging and Study of Disease Progression |
JAN 2007 |
9 pages |
| Authors:
Isla Garraway; CALIFORNIA UNIV LOS ANGELES
|
| Prostate carcinogenesis is a multi-step process resulting in the transformation of prostatic epithelial cells into invasive carcinoma and metastasis. In recent years, mouse models have emerged that recapitulate salient features of prostate carcinogenesis found in human disease. These models illuminate the molecular events that result in transformation and disease progression. In addition, mouse models can be used to identify molecular targets and to test chemotherapeutic agents that may alter the ... |
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| Development of a Rapid Decontamination System for the Nerve Agents |
15 SEP 2006 |
13 pages |
| Authors:
Howard H. Patterson; MAINE UNIV AT ORONO
|
| Catalysts using Ag+ and Fe2O3 as dopants on sodalite, Y zeolite and MCM-41 supports were investigated in order to develop a more efficient and safe catalyst for the photodecomposition of dangerous nerve agents. Ag-sodalite, Ag/Fe2O3-sodalite, Ag-Y zeolite, Ag-MCM-41 and Ag/Fe2O3-Y zeolite were all synthesized by ion exchange techniques and characterized by X-ray diffraction, solid state luminescence spectroscopy, and atomic absorption spectroscopy. The Y zeolite-based catalysts show significant spectroscopic differences between ... |
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| Transport Imaging in the One Dimensional Limit |
JUN 2006 |
83 pages |
| Authors:
Stephen D. Winchell; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF PHYSICS
|
| Transport imaging is a SEM-based technique used to directly image the motion and recombination of charge in luminescent semiconductors, allowing for the extraction of transport parameters critical to device operation. In this thesis, transport imaging for 1-D structures was initiated with work on sample preparation, modeling and initial characterization. One dimensional structures are being integrated into forefront electronics due to their inherent advantages in size, packing density and power consumption. ... |
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| Bragg Multiple Quantum Wells: Tunable Cavities for Optoelectronics Applications |
10 APR 2006 |
138 pages |
| Authors:
Lev Deych; Alexander Lisyansky; CITY UNIV OF NEW YORK RESEARCH FOUNDATION
|
| The main objective of the proposal was to conduct feasibility studies of Bragg Multiple Quantum Well (BMQW) structures from the point of view of their applications as tunable logical elements (switches, modulators, filters, etc) for optical and optoelectronic circuits and identify structures most suitable for such applications. As a result of this research the authors developed new approaches to computations of excitonic characteristics of quantum well structures and their response ... |
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| Growth and Study of Novel 3-4 m Antimonide III-V Diode Lasers Operating at Room Temperature (Hole Well Laser) |
APR 2006 |
17 pages |
| Authors:
Frederic Genty; MONTPELLIER UNIV (FRANCE)
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| This report results from a contract tasking University Montpellier 2 as follows: The objectives of this effort are to demonstrate an electrically injected Hole Well (HoW) Laser in the 3-4 m wavelength range and to obtain continuous wave operation and a high output power (>100mW) above room temperature. The tasks will be: 1. Laser design: Simulation of the structure to optimize alloy compositions and the thicknesses of the GaInSb QWs ... |
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| Growth, Characterization, and Application of InGaN with the Full-range Indium Content |
31 JAN 2006 |
33 pages |
| Authors:
Chih-Chung Yang; NATIONAL TAIWAN UNIV TAIPEI (TAIWAN) GRADUATE INST OF ELECTRO-OPTICAL ENGINEERING
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| InGaN was grown, covering the entire indium composition range, to characterize the various compositions of the material and to implement white-light generation. |
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| Multi-Spectral Dynamically Controllable Point Source |
26 JAN 2006 |
63 pages |
| Authors:
Volodymyr K. Malyutenko; UKRAINIAN ACADEMY OF SCIENCES KIEV INST OF SEMICONDUCTOR PHYSICS
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| This report results from a contract tasking Institute of Semiconductor Physics, Ukrainian Academy of Sciences as follows: This research will lead to improvements in the equipment used to test and calibrate infrared imaging systems operating at a multiple wavelength regions (multispectral remote sensing). This research can contribute to many aspects of gas detection as well as the characterization, calibration, and testing of infrared and night vision cameras used for fire ... |
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| Optical Properties of Biological Aerosols |
2006 |
19 pages |
| Authors:
Rosalba Saija; Paolo Denti; Ferdinando Borghese; MESSINA UNIV (ITALY)
|
| The study of the optical properties of biological aerosols, i.e. aerosols composed of biological spores and other organic compounds, presents unique difficulties both on the experimental and on the theoretical side. On the experimental side, we cite, as an example, the fact that all organic materials, both spores and organic compounds present a luminescence spectrum whose most carachteritic features occur in the range of wavelength in which the atmosphere is ... |
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| Transport Imaging for the Study of Quantum Scattering Phenomena in Next Generation Semiconductor Devices |
DEC 2005 |
113 pages |
| Authors:
Frank M. Bradley; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF PHYSICS
|
| The minority carrier diffusion length is a critical parameter in the development of next generation Heterostructure Bipolar Transistors (HBT) and highly efficient solar cells. A novel technique has been developed utilizing direct imaging of electron/hole recombination via an optical microscope and a high sensitivity charge coupled device coupled to a scanning electron microscope to capture spatial information about the transport behavior (diffusion lengths/drift lengths) in luminescent solid state materials. In ... |
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| Monitoring Cellular Interactions during T Cell Activation at the Single Molecule Level Using Semiconductor Quantum-Dots |
05 OCT 2005 |
8 pages |
| Authors:
Shimon Weiss; Owen Witte; Laurent Bentolila; Fabien Pinaud; James Tsay; Caius Radu; Lili Wang; CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY AND BIOCHEMISTRY
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| Enhanced peptide-coated quantum dots (with high brightness and high saturation intensity) were developed. Two high-affinity targeting "velcro-pairs" based on avidin-biotin and fluorescine-antibody interactions were demonstrated and used to specifically target single proteins in membranes of live cells. Single molecule spectroscopy and imaging of individual quantum dot-labeled lipid rafts receptors were performed. Software tools were developed to analyze individual diffusion and trafficking trajectories. These studies provide strong support for the lipid ... |
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| Intervalence Band Absorption and Carrier Heating in Type-II Sb-Based Lasers |
28 SEP 2005 |
14 pages |
| Authors:
Ahmed I. Lobad; Vern Schlie; AIR FORCE RESEARCH LAB KIRTLAND AFB NMDIRECTED ENERGY DIRECTORATE
|
| Using a nonlinear pump-probe technique, investigations of the carrier dynamics and band structure in MIR Sb-based lasers has been conducted. Specific attention has been given to Type-II QW interband transitions. In addition, measurements of the significant carrier/lattice heating at high temperatures related to slow (approximately 100 ms) thermal diffusion times are reported. Finally, the luminescence lifetime has been found to decrease significantly with temperature showing increased carrier/lattice heating and non-radiative ... |
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| Direct Imaging of Minority Charge Carrier Transport in Luminescent Semiconductors |
SEP 2005 |
74 pages |
| Authors:
David R. Luber; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A quantitative method for extracting minority carrier diffusion and drift lengths is developed and demonstrated in a heavily-doped semiconductor heterostructure. This method advances the high resolution transport imaging technique yielding key material parameters with a single non-destructive measurement. This is the first demonstration of an SEM-based contact-free non-destructive technique for high-resolution minority carrier lifetime measurement. The measured values are in excellent agreement with theoretical calculations. The imaging transport technique is ... |
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| Temperature-Compensated Pressure-Sensitive Paint Containing a Bichromophoric Luminophore |
30 JUN 2005 |
28 pages |
| Authors:
|
| The effort that has been undertaken during this Phase I STTR program will enable NanoSonic and their academic partner at the University of Dayton to readily move toward commercialization of a sensor paint during Phase II. A bichromophoric compound containing a pressure-sensitive chromophore and a temperature-sensitive chromophore has been synthesized and formulated into a paint. The luminescent intensity response of the temperature sensor was characterized by fluorescence spectroscopy and was ... |
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| Ultrafast Optical Characterization of Wide Bandgap Semiconductors and Polyatomic Molecules |
19 MAY 2005 |
15 pages |
| Authors:
Henry O. Everitt; DUKE UNIV DURHAM NC
|
| The focus of this effort was to measure the carrier dynamics in wide bandgap III-nitride materials. Measurements of carrier capture and recombination in InGaN and AlGaN/GaN MQWs revealed a similar carrier capture time for both materials but a recombination time in the AlGaN/GaN system at least a factor of ten faster. Studies of surface plasmonenhanced recombination rates in GaN QWs indicated an acceleration of recombination rates by a factor of ... |
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| Studies of Prostate Tumor Development Via CRE/LOXP Technology |
MAY 2005 |
7 pages |
| Authors:
Claudio J. Conti; TEXAS UNIV AT HOUSTON
|
| Although considerable progress in the understanding of prostate cancer has been made in the last few years, the basic knowledge of the biology of this disease remains elusive. The development of this cancer is related to the male sexual hormone (testosterone) but the actual mechanisms by which testosterone affects the development of this cancer is not known. The prostate gland has at least three different types of cells that contribute ... |
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| Secondary Electron Emission Measurements on Materials Under Stress |
OCT 2004 |
99 pages |
| Authors:
Shinichi Kobayashi; Yoshio Saito; SAITAMA UNIV URAWA (JAPAN)
|
| The breakdown of rf windows used in high-power klystron is one of the most serious problems in the development of klystrons. The dielectric breakdown strength of an alumina ceramic surface depends on the secondary electron emission which is influenced by the electronics states of the oxygen vacancy existing adjacent to the ceramic surface. In this report, the durability of several dielectric materials used for rf windows is discussed in terms ... |
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| Imaging Transport: Optical Measurements of Diffusion and Drift in Semiconductor Materials and Devices |
SEP 2004 |
61 pages |
| Authors:
Will Freeman; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Knowledge of transport parameters is important to the development of new optoelectronic materials and devices, such as ultraviolet (UV) semiconductor lasers and advanced solar cells. A series of experiments was performed to measure fundamental transport parameters in luminescent semiconductor materials. Using a technique that couples a scanning electron microscope (SEM) in spot mode with a charge coupled display (CCD) camera, it is possible to image the recombination of charge created ... |
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| Optical Supramolecules for Chemical and Physical Sensing |
02 APR 2004 |
13 pages |
| Authors:
Daniel G. Nocera; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY
|
| This proposal seeks to bring to the AFOSR a strategy to use bio- inspired concepts of recognition and signal transduction to unite the areas of optical chemosensing and nanoscience to address diverse chemical and physical sensing needs of the United States Air Force. Luminescent molecule, supramolecule or materials have been synthesized for targeted sensing application. An intrinsic component of the program has been to define fundamental parameters that control the ... |
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| Amorphous, Porous, and Black Silicon for Photonic Applications |
31 MAR 2004 |
39 pages |
| Authors:
Ali Serpenguzel; KOC UNIV SARIYER (TURKEY) DEPT OF PHYSICS
|
| This report results from a contract tasking Koc University as follows: The contractor will investigate photoluminescance and optical reflection, transmission and absorption in three types of silicon amorphous, porous, and "black" silicon, and correlate the optical properties with morphological features. All three types of silicon exhibit strong luminescence and novel optical properties. These forms of silicon could potentially lead to new optical, photonic and electrical devices such as heads-up displays, ... |
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| Lanthanide Enhanced Luminescence (LEL) with One and Two Photon Excitation of Quantum Dyes(copyright) Lanthanide(III)-Macrocycles |
JAN 2004 |
13 pages |
| Authors:
Robert C. Leif; Margie C. Becker; Al Bromm Jr.; Nanguang Chen; Ann E. Cowan; Lidia M. Vallarino; Sean Yang; Robert M. Zucker; VIRGINIA COMMONWEALTH UNIV RICHMOND DEPT OF CHEMISTRY
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| Improvements in the lanthanide enhanced luminescence (LEL) protocol have facilitated the use of the recently synthesized Eu(III)-macrocycle-mono-isothiocyanate, Quantum Dye(Registered), as a label. It was discovered that a homogeneous solution in ethanol or other solvent could be used to produce the lanthanide enhanced luminescence (LEL) effect, provided that the solution was permitted to evaporate. This protocol has been applied to the direct staining of cells in S phase, and was optimized ... |
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| Analysis of Stoichiometry-Related Defects in Group III - Nitrides |
31 DEC 2003 |
60 pages |
| Authors:
Eicke R. Weber; CALIFORNIA UNIV BERKELEY
|
| Stoichiometry-related effects in various group III-nitrides and some GaAs-based materials were investigated. An essential part of this study were low-frequency (LF) noise analyses. The new LF-noise system, acquired with an AFOSR DURIP grant (no. F49620-01-1-0285) was set up and calibrated. LF-noise spectroscopy was then applied to GOI-based MESFETs (noise caused by excess arsenic-related defects) and AlGaN/GaN HEMTs (channel noise related to an early 2D/3D growth transition for high Al-containing AlGaN ... |
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| Biodegradation of Hydrolyzed Mustard from an Assembled Chemical Weapons Assessment (ACWA) Projectile Washout Study |
DEC 2003 |
66 pages |
| Authors:
Mark A. Guelta; Laurie Fazekas-Carey; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
|
| Prior Demonstration (Demo) I and Engineering Design Study (EDS) I testing conducted by the PM, Assembled Chemical Weapons Assessment, validated biological treatment of a mixture of HD and tetrytol hydrolysates using Honeywell Immobilized Cell Bioreactor (ICB). The HD hydrolysate used in the previous tests was made from neat agent obtained from ton containers. Because the Pueblo Chemical Depot (PCD), Pueblo, CO, stockpile consists of assembled munitions that contain liquid agent ... |
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| International Symposium Advanced Display Technologies (12th): Basic Studies of Problems in Information Display (FLOWERS'2003) |
AUG 2003 |
243 pages |
| Authors:
RUSSIAN ACADEMY OF SCIENCES MOSCOW (RUSSIA) LEBEDEV INST
|
| The Final Proceedings for 12th International Symposium Advanced Display Technologies, 25 August 2003 - 27 August 2003. This is a multidisciplinary conference centered on development of display capabilities. Topics to be presented include Field Emission Displays, Liquid Crystal Displays, Organic Luminescent Displays, W = V + V = Vacuum Fluorescent Displays + Volume Vision, Electroluminescent & Electrochromic Displays & Ergonomics,Ray-Tubes, Selected Developments (PDP, Projection Devices, Civilian and Military Applications etc.) ... |
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| DURIP-FY 2002: Instrumentation for the Comprehensive Optical Analysis of Luminescence Sensors |
21 JUL 2003 |
13 pages |
| Authors:
Daniel G. Nocera; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY
|
| This proposal requested DURIP funding for the assembly of a spectroscopic facility for the comprehensive optical analysis of luminescence sensors (COALS). The COALS system is comprised of three components: absorption, emission and infrared spectrophotometers. The instrumentation provides research students of project F49620-01-1-0118 (Optical Supramolecules for Chemical and Physical Sensing, PI - Daniel G. Nocera) a powerful set of tools for their characterization of newly created luminescent molecules, supramolecules and materials. ... |
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| Assembled Chemical Weapons Assessment (ACWA) Program, Immobilized Cell Bioreactor Toxicity Monitoring |
JUN 2003 |
21 pages |
| Authors:
Mark V. Haley; Carl W. Kurnas; Mark A. Guelta; EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
|
| Until recently, incineration was the only proven technology, adopted by the U.S. Army, that successfully destroyed chemical agents. However, public opposition to incineration redirected research to evaluate alternative technologies. Through the Alternative Technology Program, the U.S. Army adopted biodegradation as a proven method for destroying the mustard stockpile at Aberdeen Proving Ground. However, research did not address the destruction of mustard when mixed with explosives generated from the destruction of ... |
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| Local Crystal Field Analysis of Eu(3+) and Er(3+) Ions in a Wide Band Gap Semi-Conductor GaN |
MAR 2003 |
37 pages |
| Authors:
Fabienne Pelle; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE BELLEVUE (FRANCE)
|
| From time resolved and site-selective excitation spectroscopy, three sites have been identified for Er(3+) ions in GaN. The main center was ascribed to Er(3+) ions substituted on the Ga sub-lattice, the two others assigned to Er(3+) complexes in interstitial positions. The complex decay profile of the (4) S(3/2) fluorescence of the main center and its concentration dependence indicate the occurrence of energy transfers between adjacent Er(3+) ions. The fluorescent transients ... |
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| Fundamental Optical Criteria to Optimize Tunable Solid State Laser Crystals |
14 JAN 2003 |
10 pages |
| Authors:
R. R. Alfano; M. Y. Sharonov; S. Owen; W. B. Wang; CITY COLL NEW YORK
|
| Impurity ion-doped dielectric crystals have extensive applications in lasers, photodetectors, nonlinear crystals, displays, and scintillators. The performance of these devices is intrinsically correlated with their ability to transfer energy from the photoexcited impurity ion into the surrounding host. We have experimentally shown the importance of exact energy resonance between phonon and local modes in the decay pathway route of the nonradiative relaxation processes. Resonance Raman scattering and up-converted hot luminescence ... |
|
| Materials Research Society Symposium Proceedings. Volume 743. GaN and Related Alloys - 2002 |
2003 |
861 pages |
| Authors:
Christian Wetzel; Edward T. Yu; James S. Speck; Angela Rizzi; Yasuhiko Arakawa; MATERIALS RESEARCH SOCIETY WARRENDALE PA
|
| Symposium L, "GaN and Related Alloys-2002," was held December 2-6 at the 2002 MRS Fall Meeting in Boston, Massachusetts During nine half-day oral sessions, nine invited talks and 53 contributed talks were given in three poster sessions, 161 posters were presented. This year's nitride symposium again was characterized by a wide scope of nitride related advances spanning from basic materials physics over process technology to high performance devices. Strong development ... |
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| Nanocrystal Targeting In Vivo |
01 AUG 2002 |
6 pages |
| Authors:
Maria E. Akerman; Warren C. Chan; Pirjo Laakkonen; Sangeeta N. Bhatia; Erkki Ruoslahti; BURNHAM INST LA JOLLA CA
|
| Inorganic nanostructures that interface with biological systems have recently attracted widespread interest in biology and medicine. Nanoparticles are thought to have potential as novel intravascular probes for both diagnostic (e.g., imaging) and therapeutic purposes (e.g., drug delivery). Critical issues for successful nanoparticle delivery include the ability to target specific tissues and cell types and escape from the biological particulate filter known as the reticuloendothelial system. We set out to explore ... |
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| Solvothermal Molecular Precursor Routes to Semiconductor Film and Crystal Growth |
AUG 2002 |
7 pages |
| Authors:
Edward G. Gillan; IOWA UNIV IOWA CITY DEPT OF CHEMISTRY
|
| This research project explored the utility of molecular precursor decomposition in superheated non-aqueous solvents directed towards semiconductor crystal growth. Reactions were run in toluene, THF, and under solvent free conditions. An in situ precursor synthesis and decomposition resulted in GaN nanoparticles from simple starting materials (GaCl(3) and NaN(3)). Particle sizes range from about 10 to hundreds of nanometers. Upon annealing to 1000 degrees C, the poorly crystalline products ordered into ... |
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| Organic Nanophotonics |
AUG 2002 |
85 pages |
| Authors:
COMMISSARIAT A L'ENERGIE ATOMIQUE PARIS(FRANCE)
|
| The Final Proceedings for Organic nanophotonics, 25 August 2002 - 29 August 2002 This is an interdisciplinary conference. Topics include the following: 1) Molecular and supra-molecular engineering for photonic applications: - Dendrimers, - Engineered DNA, - Self-assembly, 2) Nanostructured organic materials for photonics and optics; - Light Emitting Devices, - Photovoltaics, - Photonic- band-gap Materials, 3) New nanoscale photonic characterization techniques - Near-field Optical Microscopy and Spectroscopy, - Scanning Tunneling ... |
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| Peculiarities of Ramjet Combustion Chamber Work with Resonator Under Condition of Vibration Fuel Combustion |
JUL 2002 |
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| Authors:
A. V. Potapkin; A. A. Pavlov; D. Yu. Moskvichev; RUSSIAN ACADEMY OF SCIENCES NOVOSIBIRSK INST OF THEORETICAL AND APPLIED MECHANICS
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 | An optical measurement and registration system of electronic radiation of electron-excited radicals OH in flames is presented in this work. To investigate diffusion hydrogen-air torches the mentioned system was used. The obtained experimental data were used for analysis of a thrust formation of the ramjet ejector combustor with acoustic resonator by vibrating burning of hydrogen. It was offered a way to determine geometrical parameters of ejector system and hydrogen consumptions ... |
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| Influence of a Binder Layer on the Response Time of Pressure-Sensitive Coatings |
JUL 2002 |
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| Authors:
G. M. Zharkova; V. M. Khachaturyan; A. N. Malov; A. A. Lopatkina; RUSSIAN ACADEMY OF SCIENCES NOVOSIBIRSK INST OF THEORETICAL AND APPLIED MECHANICS
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| The present work describes an experimental study of pressure- sensitive luminescent coatings containing phosphors prepared on different substrates. Data are presented concerning measurements of luminescence intensity and luminescence decay kinetics at different pressures and temperatures. |
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| The Influence of Annealing Temperature and Doping on the Red/Near-Infrared Luminescence of Ion Implanted SiO2:nc-Si |
JAN 2002 |
7 pages |
| Authors:
D. I. Tetelbaum; V. A. Burdov; S. A. Trushin; A. N. Mikhaylov; D. G. Revin; PHYSICAL TECHNOLOGICAL CENTER GORKY (RUSSIA)
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| The results of an experimental research of the dependence of photoluminescence (PL) intensity in region about 800 nm for silicon nanoinclusions (quantum dots) obtained by Si ion implantation in SiO2 on the dose of Si ions at two temperatures of an annealing T(sub ann) = 1000 and 1100 deg C are presented. It is established that in both cases the dependences have the shape of the curves with a maximum. ... |
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Reports by Keyword(s)
LUMINESCENCE
