Tiny metallic nanoparticles have the potential to change the landscape of defense technology, from obscuring warfighters from view to providing transparent displays in aircraft and vehicles. A nanoparticle is defined as a particle with one or more dimensions measuring 1 billionth of a meter (1 nanometer [nm]). Typical nanoparticles range from 1 to 1,000 nm. A typical human hair is about 90,000 nm thick. Therefore, an item of 1 nanometer would be invisible to the naked eye. Scientists at the...
Topics: DTIC Archive, DEFENSE ACQUISITION UNIV FT BELVOIR VA, *NANOPARTICLES, DISPLAY SYSTEMS, GOLD,...
Topics: DTIC Archive, Stewart, Diane K, MICRION CORP PEABODY MA, *ELECTRONICS, GOLD, DEPOSITION, COMPUTER...
Previous investigations studied the diffusion of nickel into copper bicrystals, while the present experiments have been concerned with the diffusion of gold into copper bicrystals. The theoretical solutions and approximations were evaluated mathematically and the results used for the analysis of the experimental data. The case of surface diffusion in metal systems is comparable to that of grain-boundary diffusion in that both involve concomitant volume diffusion. Therefore experimental and...
Topics: DTIC Archive, AUSTIN, A E, BATTELLE MEMORIAL INST COLUMBUS OH, *SOLIDS, GOLD, DIFFUSION, CRYSTALS,...
Topics: DTIC Archive, BELLMAN, RICHARD, RAND CORP SANTA MONICA CA, *GOLD, *SCHEDULING, MATHEMATICAL...
This work had three results: 1) construction of gold bipyramid nanostructures for tuning the plasmon resonance between visible/IR wavelengths; these structures with a high aspect ratio allowed extension of the local surface plasmon resonance (LSPR) toward IR wavelengths as far as 1850nm. 2) Optical transmission properties of dispersions of self-orienting gold nanoparticles (spherical and bipyramidal) in sol-gel hybrid silica, which could be used as optical limiters (transmitting at low levels...
Topics: DTIC Archive, LYON-1 UNIV VILLEURBANNE (FRANCE), *OPTICAL LIMITERS, GOLD, HYBRID SYSTEMS,...
Using scanning tunneling microscopy we observed reaction products of two chemisorbed thiolate species, methylthiolate and phenylthiolate, on the Au(111) surface. Despite the apparent stability, organometallic complexes of methyl- and phenylthiolate with the gold-adatom (RS-Au-SR, with R as the hydrocarbon group) undergo a stoichiometric exchange reaction, forming hybridized CH3S-Au-SPh complexes. Complementary density functional theory calculations suggest that the reaction is most likely...
Topics: DTIC Archive, VIRGINIA UNIV CHARLOTTESVILLE, *THIOLS, ADATOMS, ADSORPTION, GOLD, SELF ASSEMBLED...
A series of gold nanoclusters stabilized by ligands containing short ethylene oxide oligomers of fixed length were prepared and characterized. The thiols CH3(OCH2CH2)nSH (where n = 2, 3, and 4) were substituted onto the surface of 1.8-nm hexanethiol-capped gold clusters by a thiol-exchange reaction, and the resulting nanoclusters were characterized by NMR, FTIR, and UV/vis spectroscopies; TGA; and TEM analysis. A degree of ligand exchange greater than 99% was achieved, and the gold core...
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *GOLD, *MOLECULAR ELECTRONICS, ETHYLENE OXIDE,...
This project focuses on the interactions between plasmon-resonant-plasmonic- materials and structures and molecules, and how the coupling between plasmonic media can modify either molecular-excitonic properties. In this three year project we have demonstrated hot electron-induced photodissociation of H2 on Au nanoparticles at room temperature. The Au catalyst nanoparticles are embedded in TiO2 or SiO2 media and the role of the Au plasmon and the embedding media in the dissociation of H2 has...
Topics: DTIC Archive, RICE UNIV HOUSTON TX, *PLASMONS, FOUR WAVE MIXING, GOLD, HYDROGEN, NANOSTRUCTURES,...
The utilization of the plasmonic response of aptamer-gold nanoparticle conjugates (Apt-AuNPs) to design cross-reactive arrays for fingerprint identification of small molecular targets was demonstrated for the first time. Four aptamers with different structural features previously selected to bind different targets were used in combination with AuNPs by adsorbing the DNA on the AuNPs surface. The optimized response of the Apt-AuNPs to the analytes showed that, depending on the specific aptamer...
Topics: DTIC Archive, UES INC DAYTON OH, *DEOXYRIBONUCLEIC ACIDS, CLUSTERING, FINGERPRINT RECOGNITION,...
Nanoparticulate metal-insulator-metal ensemble chemiresistors in which the Au nanoclusters are functionalized with mercaptohexanoic acid are investigated as sensors of amines, and especially of triethylamine to which they are found to be extraordinarily sensitive with a minimum detectable level of less than 500 ppt. The dependences of the response on dose, time, and temperature are studied in detail. Modeling indicates that the entire data set is well explained by the interaction of...
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *REACTION KINETICS, AMINES, DETECTORS, DIFFUSION,...
Gold was found to diffuse into Si by a complex mechanism involving a vacancy-controlled inter stitial-substitutional equilibrium. This led to very complex diffusion concentration profiles. In analyzing the problem, a new experimental value was found for the self-diffusion coefficient of Si, 1.81 x 10 to the 4th power exp (-112=20 kcal/RT)sq cm/sec, which compared very favorably with previous data on diffusion of Bi, Ge, and Sn in Si. The interstitial gold diffusion coefficient was found to be...
Topics: DTIC Archive, Wilcox, W R, AEROSPACE CORP EL SEGUNDO CA, *DIFFUSION, *GOLD, TEMPERATURE, ATOMIC...
This project in its final form has focused on hydrogen production from ethanol and water-ethanol mixtures over a range of different gold-titania photocatalysts. Gold supported on a commercial anatase: rutile mixture has been found to be 3 times more active for hydrogen production than the previously reported gold on anatase photocatalysts. Other products detected were ethene and acetaldehyde; these products were enhanced in the presence of water. In-situ EPR spectroscopy was used to show that...
Topics: DTIC Archive, ABERDEEN UNIV (UNITED KINGDOM), *ETHANOLS, CATALYSIS, GOLD, HYDROGEN, PHOTOCHEMICAL...
A recent experiment using projectile fragmentation of a Au197 beam on a Be9 target, combined with the fragment recoil separator and experimental storage ring at ring at GSI, has uncovered an isomeric state in Re192 at 267(10) keV with a half-life of 60 s. The data analysis technique used to resolve the isomeric state from the ground state is discussed.
Topics: DTIC Archive, ARMY RESEARCH LAB ADELPHI MD, *NUCLEAR ISOMERS, BERYLLIUM, FRAGMENTATION, GOLD,...
A scalable means of isolating significant quantities of trioxyethylene-encapsulated gold nanoclusters (GNCs) labeled with a single DNA strand is demonstrated. Quantitative characterization of the product is obtained using UV-vis absorbance spectroscopy. These methods of isolation and characterization of singly functionalized GNC-ssDNA conjugates are expected to aid development of nanoscience applications that use DNA molecular recognition for guiding self-assembly.
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *DEOXYRIBONUCLEIC ACIDS, *GOLD, NANOTECHNOLOGY,...
Topics: DTIC Archive, JAUMOT, Jr, FRANK E., PENNSYLVANIA UNIV PHILADELPHIA, *COPPER ALLOYS, GOLD ALLOYS,...
The Defense Science Board (DSB) Task Force on Joint Experimentation was established to examine the joint experimentation programs and activities at the Joint Forces Command JFCOM and to recommend ways to enhance the contributions of joint experimentation to transformation. The Task Force assessed the goals, process, and substance of JFCOM's experimentation program. The Task Force also provided an external review of the Millennium Challenge 02 (MC02) experiment.
Topics: DTIC Archive, Gold, Ted, DEFENSE SCIENCE BOARD WASHINGTON DC, *MILITARY OPERATIONS, *JOINT MILITARY...
The primary objective of this research is to study the dispersion of the surface plasmon to correlate the physical origins or various phenomena linked to plasmonic effects. The goal is to fabricate multilayered plasmonic metamaterials and experimentally study their photonic properties when nonlinear amplifying dye molecules are imbedded in the structures.
Topics: DTIC Archive, INDIAN INST OF TECH KANPUR, *GRATINGS(SPECTRA), *PLASMONS, COMPOSITE MATERIALS,...
Density functional theory (DFT) and time-dependent DFT (TDDFT) have been employed to examine the optical absorption spectra of bare and passivated (thiolate-, phosphine-, or carboxylate-stabilized) gold and silver nanoparticles. The location of the ligands is responsible for causing splitting in the optical absorption spectra of thiolate-stabilized nanoparticles. The choice of metal and ligand affects the thermodynamic stability of the staples on the surface of the nanoparticle, and may affect...
Topics: DTIC Archive, KANSAS STATE UNIV MANHATTAN, *METALS, *OPTICAL PROPERTIES, *STRUCTURAL PROPERTIES,...
Surface enhanced Raman scattering has been investigated from rhodamine 6G molecules embedded in polymethyl methacrylate (R6G + PMMA) and coated on one-dimensional and two-dimensional gold-dielectric gratings fabricated by laser interference lithographically. The Raman signals from these plasmonic templates are 200 to 400 times larger than the signal from R6G + PMMA coated on plain gold films. The enhancement of the Raman signal varies almost periodically with the period of the grating....
Topics: DTIC Archive, INDIAN INST OF TECH KANPUR, *COMPOSITE MATERIALS, *RAMAN SCATTERING, GOLD, INDIA,...
The Defense Science Board (DSB) Warfighting Transformation Task Force was charged with reviewing the transformation activities underway in the Department of Defense (DoD) to: provide an independent, comprehensive picture of transformation efforts that encompasses processes, organizational responsibilities, and anticipated products; identify opportunities to enhance, as well as the obstacles to, transformation progress; and recommend Criteria to gauge progress over the next several years....
Topics: DTIC Archive, Gold, Ted, DEFENSE SCIENCE BOARD WASHINGTON DC, *MILITARY OPERATIONS, DEPARTMENT OF...
This project involved investigation and optimization of the chemistry needed to immobilize biorecognition elements (BRE) on gold nanoparticles (AuNPs) to create selective nanoprobes for integration in micro- and nano-fluidic platforms to perform biomarker quantification in biofluids. The AuNPs serve as BRE carriers for analyte pre-concentration to be interfaced with a sensor platform that increases overall sensor sensitivity. Thiol coupling approaches were used in the optimization chemistry to...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN PERFORMANCE WING (711TH),...
In this study hybrid nanoparticles (Pd@SiO2, Au@Gd2O3) have been synthesized and characterized. Gd2O3:Eu NPs were successfully synthesized using polyol synthetic routes. Nanoparticles with an average diameter size of 1-2 nm were produced in high yield. XPS analysis confirmed the successful coating of the nanoparticles with PEGCOOH and aminocapronic acid. Palladium nanoparticles synthesized using an aqueous route was more stable in aqueous solvent than palladium nanoparticles synthesized in the...
Topics: DTIC Archive, SOUTH AUSTRALIA UNIV MAWSON LAKES (AUSTRALIA), *GOLD, *PALLADIUM, *NANOPARTICLES,...
A new 30mm cartridge case is evaluated at an operating pressure of 75,000 psi. The case is thin-walled throughout (0.03 in.) and is designed principally to obturate propellant pressure and prevent corrosion of the chamber. Steel, plastics and aluminum alloys were evaluated at design conditions with the result that aluminum is best suited for the job. An analysis was also performed assuming a support gap between chamber and bolt which indicated survival of the case.
Topics: DTIC Archive, Gold, Leonard M, FRANKFORD ARSENAL PHILADELPHIA PA, *STRESSES, *CARTRIDGE CASES,...
Monolayers of N-ethyl-N-octadecyl-4,4-bipyridinium (EOB) have been prepared on smooth gold surfaces prepared by spontaneous self-assembly of the electrochemically reduced form of the amphiphile and have been examined with in situ Fourier Transform Infrared Reflection Absorption Spectroscopy (FTIRRAS). Prominent positive-going peaks with hardly any detectable negative-going counterparts were observed in the normalized potential difference spectra of the layer in the reduced state (using as a...
Topics: DTIC Archive, Bae, I, CASE WESTERN RESERVE UNIV CLEVELAND OH, *SPECTROSCOPY, SURFACES, SPECTRA,...
In the production of some devices, novel micro fabrications techniques are important, where the goal is compatibility with the system, convenience, and cost rather than high resolution. Electron beam and photolithography techniques are common fabrication techniques used in the semiconductor industry. Even though these techniques are common, they are high cost and not compatible with many substrates. This dissertation work explores a versatile and cost effective novel technique to fabricate...
Topics: DTIC Archive, UNIVERSITY OF SOUTHERN MAINE PORTLAND, *NANOMATERIALS, FABRICATION, FILMS,...
Topics: DTIC Archive, DAVID SARNOFF RESEARCH CENTER PRINCETON NJ, *INFRARED PHOTOCONDUCTORS, ZINC, DOPING,...
The Electronic Properties Information Center was established to collect, index and abstract the literature on the electrical and electronic properties of materials and to evaluate and compile the experimental data from that literature. A modified coordinate index to the literature is machine stored and printed for manual use. The Center publishes data sheets, summary reports, thesauri, glossaries, and similar publications as sufficient information is evaluated and com piled. This report...
Topics: DTIC Archive, Neuberger, M, HUGHES AIRCRAFT CO CULVER CITY CA, *SILICON, *ELECTRICAL CONDUCTIVITY,...
In this study, diffusion of single adatoms and mono-vacancies on Au(100), Ag(110) and W(100) was investigated. The measurements on Au(100) and Ag(110) were conducted with using Scanning Tunneling Microscope (STM), whereas measurements on W(100) were conducted with using Field Ion Microscope (FIM). The activation energy for Au adatom diffusion on Au(100) surface was found to be 0.32+ or - 0.02eV and diffusion of mono-vacancies has been observed. The vacancies were created via Ne+ ion sputtering....
Topics: DTIC Archive, ILLINOIS UNIV AT URBANA-CHAMPAIGN, *GOLD, ACTIVATION ENERGY, ADATOMS, DIFFUSION,...
For data which take the form of a two-way contingency table, many authors have examined models other than the common model of independence of two classifications. In the literature are quasi independence models, clustered sampling models, intraclass models, and the Bradley-Terry model, parameters others. In order to estimate model parameters, iterative methods are required, and this leads to the problem of developing efficient algorithms.
Topics: DTIC Archive, Scott, David J, Wang, Qian D, BOND UNIV GOLD COAST (AUSTRALIA), *ALGORITHMS,...
The goal of this program is to investigate new dielectrics, metals and processes for the fabrication of multi-chip modules which hold the promise of exceptional electrical performance in the GHz region in addition to high yield and high reliability. The low dielectric constant insulators are being evaluated through the fabrication of in-situ test structures using gold as the metallization. In the course of doing this evaluation, a simple process for gold MCMs has been investigated. A processing...
Topics: DTIC Archive, Kohl, Paul, GEORGIA INST OF TECH ATLANTA SCHOOL OF CHEMICAL ENGINEERING, *METALS,...
Topics: DTIC Archive, LANGEVIN, R.A., CLEVITE TRANSISTOR PRODUCTS BOSTON MA, *TRANSISTORS, *ANTIAIRCRAFT...
In the current study the synthesis of hollow gold nanoshells (HAuNS) is demonstrated through the use of a galvanic replacement reaction. HAuNS of select diameter and shell thickness were synthesized and tunability of the extinction coefficient was demonstrated through control of the materials' core-shell ratio.
Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH...
Exact solutions for the reflection and transmission coefficients are obtained for two general electron density distributions: kinked-trapezoid and exponential-homogeneous-exponential. Normal incidence into a stratified plasma slab is assumed so that the electromagnetic waves are propagating parallel to the free electron density gradients. A constant magnetic field is applied in the propagation direction. The solutions derived on this basis are used to evaluate the effect of the more realistic...
Topics: DTIC Archive, Gold, Richard R, AEROSPACE CORP EL SEGUNDO CA, *ELECTROMAGNETIC WAVE REFLECTIONS,...
Pure gold wires (99.999%) were resistance heated to 680 C in a gasous medium at pressures between 400 and 11,000 atmospheres and quenched by turning off the heating current. The temperature decayed exponentially with a half-life of 1.6 x 1/100 sec. The logarithm of the quenched-in electric resistance delta R decreased linearly with increasing pressure. From the pressure effect on delta R an activation volume for vacancy formation at 680 C of delta V sub f (9.16 = 0.68) x 10 to the minus 24...
Topics: DTIC Archive, Huebener, R P, WATERVLIET ARSENAL NY, *GOLD, *SOLID STATE PHYSICS, VOLUME, WIRE,...
The team led by PI Quan Li has conceptualized and rationally synthesized many novel functional hybrid gold nanorods (GNRs) and liquid crystal media. Now this project has accomplished all the proposed objectives and beyond. Organo-soluble chiral azo thiol monolayer-protected gold nanorods, the first of its kind, were synthesized and characterized. More importantly, the chirality of the hybrid GNRs was optically tunable. Moreover, organo-soluble porphyrin mixed monolayer-protected GNRs, porphyrin...
Topics: DTIC Archive, KENT STATE UNIV OH LIQUID CRYSTAL INST, *ENCAPSULATION, *GOLD, *NANOSTRUCTURES,...
Here we present the synthesis of the enzyme DNase 1 stabilized gold nanoclusters (DNase 1:AuNCs) with core size consisting of either 8 or 25 atoms. The DNase 1:Au8NCs exhibit blue fluorescence whereas the DNase 1:Au25NCs are red emitting. In addition to the intense fluorescence emission, the synthesized DNase 1:AuNC hybrid retains the native functionality of the protein, allowing simultaneous detection and digestion of DNA with a detection limit of 2 microg/mL. The DNase 1:AuNCs could be...
Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD, *FLUORESCENCE, *GOLD, *RIBONUCLEASE,...
The purpose of the project is to obtain the 3D reconstruction structure of the IGP- Il/insulin receptor isoform A(IR-A) complex by cry%STEM to elucidate the laP-Il binding site on IR-A. Gold-labeled IGF-II has been prepared by reacting IGP-II with sulfo-NHS- Nanogold, and purified by size-exclusion HPThC. The purified product, Nanogold-IGF-lI, was labeled with gold at its N-terminal alanine. Insulin receptor proteins, IR-A and IR-B have been extracted and purified from transfectant cells....
Topics: DTIC Archive, Yip, Cecil C, ILLINOIS UNIV AT CHICAGO, *SENSE ORGANS, *RECEPTOR SITES(PHYSIOLOGY),...
Topics: DTIC Archive, Sarid, D, ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER, *MICROSTRUCTURE, *PHOTONS,...
Self-assembled plasmonic Dolmen structures consisting of small gold nanorods (length = 50 nm and diameter = 20 nm) with a few nanometer gaps are observed to show coherent effects of super-radiance and characteristics of Fano resonance due to the significantly reduced symmetry of the structure. Relative to previous larger structures from top-down electron-beam lithography, the single crystallinity and atomically smooth surfaces of these self-assembled plasmonic structures result in 50% narrower...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH FUNCTIONAL MATERIALS DIV, *PLASMONS,...
This project aimed at novel nano-sized thermal sensors that can measure temperature and retrieve thermal history of the biological agents experienced during the testing of agent-defeat weapons. Thermal response of Au-based core/shell nanostructures and thin film upon rapid temperature change was studied and their potential as dynamic nanothermometers was explored. The fund ($557,586) mainly supported a PhD student and 2 postdoc fellows at Rensselaer Polytechnic Institute and Texas State...
Topics: DTIC Archive, RENSSELAER POLYTECHNIC INST TROY NY, *THERMOMETERS, BIOLOGICAL AGENTS, DETECTORS,...
Protein encapsulated gold nanocluster (P-AuNC) synthesis was first demonstrated in 2009. Initially these P-AuNCs were used as cellular imaging agents as the protein shell surrounding the AuNC made them highly biocompatible. However, recent studies have begun to show that these stabilizing proteins may also retain native biological function thus giving a dual functionality to these hybrid molecules. Here we present the synthesis of DNase 1 stabilized gold nanoclusters (DNase 1:AuNCs) with core...
Topics: DTIC Archive, ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD, *FLUORESCENCE, DEOXYRIBONUCLEIC ACIDS,...
Cucurbit[n]uril-based rotaxane or pseudorotaxane devices connected to gold electrode surfaces and spherical gold nanoparticles have previously been developed. Herein, we report the preparation and characterization of gold nanorods (GNRs) protected by a hydrophilic cucurbit[7]uril-based-pseudorotaxane anchored monolayer. The resulting GNRs decorated with both cucurbit[7]uril-based pseudorotaxane disulfide and sodium thioctate on their entire surface through covalent S Au linkages are...
Topics: DTIC Archive, CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE, *GOLD,...
This paper describes the preparation and wetting properties of two-component self-assembled monolayers (SAMs) obtained by the competitive adsorption of one short-chain (HS(CH2)1OSh) and one long-chain (HS(CH2)21LG) alkanethiol onto gold from dilute ethanolic solutions. The four possible combinations of the tail groups CH3 and CH20H were investigated: Sh = CH3/Lg = CH20H, Sh = CH2OH/Lg = CH3, SH = CH2OH/Lg = CH2OH, and Sh = CH3/Lg = CH3. The compositions of these SAMs are not the same as the...
Topics: DTIC Archive, Folkers, J P, HARVARD UNIV CAMBRIDGE MA DEPT OF CHEMISTRY, *ALKANES, *WETTING, *GOLD,...
Nanoshells form the basic substrate for many of the surface enhanced spectroscopic studies undertaken under this MURI. We have developed a general facile technique to metallize dielectric nanoparticles. We hope this would widen the appeal of core-shell nanoparticles and simplify the production of larger quantities of core-shell nanoparticles. The SERS, and SERS-SEIRA techniques developed previously have been applied to elucidate reaction pathways in a metal catalyzed reaction, sensing small...
Topics: DTIC Archive, RICE UNIV HOUSTON TX, *SURFACE PROPERTIES, *NANOSTRUCTURES, SPECTROSCOPY, PEPTIDES,...
Electrical properties of gold-silicon barriers were studied in some detail. The reverse leak age current of these barriers is shown to be caused by lowering of the barrier due to the image force effect. The thermal activation energy of the saturation current was found to be 0.799 eV, identical to the height of the Au-Si barrier. The barrier height, saturation current density, and ideality of Pt, Pd, Ag, Ni and Cu barriers to Si are presented. Two methods for fabricating hot electron triodes are...
Topics: DTIC Archive, HP ASSOCIATES PALO ALTO CA, *SEMICONDUCTOR DIODES, *ELECTRON EMISSION, *PHOTOELECTRIC...
A Ka-band gyrotron oscillator powered by a compact pulseline accelerator has been operated using oscillator cavities with and without axial slots. The use of axial slots has been shown to suppress low starting current whispering-gallery modes, in particular modes of the TE(m2) type, allowing stable operation in a linearly-polarized TE(13) mode. A peak power of 35 MW has been observed at 6% efficiency. Keywords: Gyrotron oscillator, Low start oscillation threshold currents, Cylindrical cavity,...
Topics: DTIC Archive, Gold, S H, NAVAL RESEARCH LAB WASHINGTON DC, *CAVITIES, *GYROTRONS, *OSCILLATORS,...
The long-term vision of this research is to develop, characterize, and exploit surface chemistries that create stable protein-surface interactions by mimicking biological interfaces. We are pursuing this goal by chemically functionalizing well-defined and well-characterized surfaces with structured peptides. These peptides, which can be synthesized with any residual functional group, generate an electrostatic surface that will interact with proteins introduced from solution with chemically- and...
Topics: DTIC Archive, TEXAS UNIV AT AUSTIN, *ELECTROSTATICS, *PROTEINS, *SELF ASSEMBLED MONOLAYERS,...
This report describes the techniques developed and the procedures used successfully copper, nickel and gold plating small (0.040, 0.031, 0.020 and 0.016 in.) diameter plated through holes utilized as interface (side-to side) connections in double sided printed circuit boards.
Topics: DTIC Archive, Hogan, Robert P, FRANKFORD ARSENAL PHILADELPHIA PA, *HOLES(OPENINGS), *PRINTED...
Electrical and optical properties of impurity centers in semiconductors such as energy level scheme, thermal and optical cross sections, and thermal emission rates have been measured and studied using the steady state and transient photoconductivity measurements, infrared absorption, Hall effect and conductivity over a wide range of temperatures, thermally stimulated conductivity and other methods. In this paper, several measurement techniques of these thermal and optical parameters using...
Topics: DTIC Archive, Sah, C T, ILLINOIS UNIV AT URBANA MATERIALS RESEARCH LAB, *CHARGE CARRIERS,...
An introduction to vocoders is presented. An elementary discussion of speech fundamentals is followed by a brief description of the different branches of speech research work. Explanations are presented of channel vocoders, voice-excited vocoders and, finally, the vocoder built for this research.
Topics: DTIC Archive, Gold, Bernard, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *SPEECH, *VOCODERS,...
