| Low-Loss Optical Metamaterials Based on Mie Resonances in Semiconductor Nanoparticle Composites |
13 Dec 2012 |
12 pages |
| Authors:
Jason G Valentine; VANDERBILT UNIV NASHVILLE TN DIV OF SPONSORED RESEARCH
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 | This document is our final technical report and describes the efforts under contract N00014-11-1-0521. The objective of this work was to establish the feasibility of creating solution processed metamaterials formed from composites of semiconductor quantum dots (QDs). The specific goals of this work included, (1) modeling of the metamaterial's optical properties, (2) developing fabrication techniques and (3) experimental characterization of the materials' optical properties. Modeling was first conducted and it ... |
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| Design and Characterization of Optical Metamaterials Using Tunable Polarimetric Scatterometry |
Dec 2012 |
131 pages |
| Authors:
Jason C Vap; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| Optical metamaterials are a class of engineered materials with a wide range of material properties and an equally wide range of anticipated applications. This research targets optical metamaterials in two ways. First, the dimensional constraints necessary to bring effective medium theory (EMT) into agreement with the already well-established transfer matrix method (TMM) modeling for a periodic, stratified (metal-dielectric) near-zero permittivity structure were determined. This provided a path to leverage the ... |
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| Managing Phonon Transport by Core/Shell Nanowires |
28 Nov 2012 |
6 pages |
| Authors:
Li Baowen; NATIONAL UNIV OF SINGAPORE DEPT OF PHYSICS
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| We studied thermal conductivity in core-shell nanowires (NW) by using molecular dynamics simulations. Interestingly, a remarkable oscillation effect in heat current autocorrelation function in core-shell NWs has been observed, while the same effect is absent in pure silicon nanowires, nanotube structures, and random doped nanowires. Detailed characterizations of the oscillation signal reveal that this intriguing oscillation is caused by the coherent resonance effect of the transverse and longitudinal phonon modes. ... |
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| Nanobioinformatics: Emerging Computational Tools to Understand Nano-Bio Interaction |
16 Nov 2012 |
7 pages |
| Authors:
U S Murty; INDIAN INST OF CHEMICAL TECHNOLOGY HYDERABAD
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| Nanoparticles (NP) are being used in our daily life; these help humans in many ways; usage of these NP's have increased tremendously recently without knowing their complications or health problems they could lead to; these nanoparticles should be studied for their toxicities, because the nano-size properties of every element are found to vary from the element in micro size, and many nanoparticles were found to be highly reactive in their ... |
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| Aperiodic Photonic-Plasmonic Structures with Broadband Field Enhancement |
15 Oct 2012 |
36 pages |
| Authors:
Gary Walsh; Luca Dal Negro; BOSTON UNIV MA
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| This report documents project work performed by Boston University (BU) under a contract awarded by the Natick Soldier Research, Development and Engineering Center (NSRDEC) to Battelle Memorial Institute. The project was aimed at combining plasmonic field enhancement effects in rigorously designed metal-dielectric arrays of nanoparticles with periodic and aperiodic geometries for the demonstration of field-enhanced isomerization with minimum background absorption. BU developed metal-dielectric nanostructures on transparent substrates (quartz, silicon nitride) ... |
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| Acoustic Metamaterials Through a Microfluidic, Bottom-up Approach: Toward Highly Attenuating, Negative Effective Density Materials |
Oct 2012 |
9 pages |
| Authors:
Ashod Aradian; Oliver Mondain-Monval; S Raffy; T Brunet; J Leng; B Mascaro; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE TALENCE (FRANCE) LAB DE CHIMIE DU SOLIDE
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| Our initial idea was to build metamaterials with specific properties such as large attenuation capacities in a targeted field of frequencies. If much work has been up to now performed using centimetre-sized handmade mechanical resonators adapted to audible frequencies [1-3], fewer attempts have been made on smaller micro-resonators, in the 100 m range, i.e. for ultrasonic frequencies. Following this path, we recently proposed two different microfluidic approaches to get such ... |
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| The Comparison of Hydrotreated Vegetable Oils With Respect to Petroleum Derived Fuels and the Effects of Transient Plasma Ignition in a Compression-Ignition Engine |
Sep 2012 |
117 pages |
| Authors:
M A Carr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis presents the results of an experimental study of the combustion characteristics of algae and camelina derived biofuels as well as the effects of Transient Plasma Ignition in a Compression-Ignition Engine. Testing was conducted for Hydrotreated Renewable Diesel, algae, and benchmarked against F-76 and Diesel #2 fuels as well as Hydrotreated Renewable Jet, camelina, benchmarked against JP-5 across a matrix of constant engine speeds and engine loads in a ... |
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| Graphene Research Support |
Sep 2012 |
5 pages |
| Authors:
Peter Blake; Da Jiang; Craig Lang; GRAPHENE INDUSTRIES LTD MANCHESTER (UNITED KINGDOM) MANCHESTER CENTER OF MESOSCIENCE AND NANOTECHNOLOGY
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| There was a steady increase in average flake size in the years following the initial isolation of monolayer grapheme in 2004, but even by 2008, flakes rarely exceeded 1000 sq microns. As part of the research for this grant, carefully analyzed the factors that affect flake size, including: graphite source (natural, HOPG, Kish), type of adhesive tape, number of cleaves, substrate material and roughness, substrate cleaning (sonication, piranha etch, oxygen ... |
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| Use of Activated Carbon to Control Volatilization of Organic Contaminants from the Indiana Harbor Confined Disposal Facility |
Sep 2012 |
145 pages |
| Authors:
Tommy E Myers; Cindy B Price; Daniel E Averett; Paul R Schroeder; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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| Volatilization controls have been considered to meet limits on volatile emissions that may be imposed on dredging, disposal, and site management of an Indiana Harbor and Canal (IHC) Confined Disposal Facility (CDF). Carbon adsorption is a proven technology for removal and sequestration of organic compounds in water, but its application to control volatile emissions from dredging operations has not been thoroughly investigated. This study investigated the processes relevant to volatile ... |
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| Development and Application of Acoustic Metamaterials with Locally Resonant Microstructures |
02 Aug 2012 |
33 pages |
| Authors:
C T Sun; PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS
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| Waves cannot propagate without attenuation in elastic solids with negative mass density or modulus. This briefing looks at the effect in metamaterials. |
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| Control of Resonances and Optical Properties of Plasmonic-Patch Metamaterials |
01 Aug 2012 |
41 pages |
| Authors:
Anantha Ramakrishna; INDIAN INST OF TECH KANPUR
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| 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. |
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| Biopolymers as an Alternative to Petroleum-Based Polymers for Soil Modification; ESTCP ER-0920: Treatability Studies |
Aug 2012 |
44 pages |
| Authors:
Steven L Larson; John K Newman; Christopher S Griggs; Milton Beverly; Catherine C Nestler; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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| Rhizobium tropici, a catalogued symbiotic nodulator of leguminous plants, is also known for its production of a gel-like extracellular polymeric substance (EPS). The natural functions of the biopolymer in the rhizosphere include surface adhesion, self-adhesion of cells into biofilms, formation of protective barriers, water retention around roots, and nutrient accumulation. We performed three treatability studies to evaluate the effectiveness of the biopolymer as a soil amendment to increase slope stability ... |
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| Novel Optical Metamaterials and Approaches for Fabrication |
Aug 2012 |
21 pages |
| Authors:
Alkim Akyurtly; Joel Therrien; Aaron Bandremer; MASSACHUSETTS UNIV LOWELL
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| Techniques for the fabrication of novel optical metamaterials using chemical and biological self-assembly were investigated based on a recently developed material design. The design is for a low-loss and isotropic negative index metamaterial (NIM) for the visible regime based on silicon carbide (SiC) spherical nanoparticles embedded inside of a magnesium diboride (MgB2) host. This work offers a solid technical foundation for the continued investigation of metamaterial fabrication using both chemical ... |
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| Multi-Scale Simulation of Interfacial Phenomena and Nano-Particle Placement in Polymer Matrix Composites |
Aug 2012 |
32 pages |
| Authors:
John Kieffer; MICHIGAN UNIV ANN ARBOR DEPT OF MATERIALS SCIENCE AND ENGINEERING
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| Outline: Simulation approach, Generating Realistic Structures, Structural Ubiquities, Property Prediction and Analysis of governing Principles and Summary and Outlook. |
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| Defense System Perspectives on Multifunctional Design for Actuation |
Aug 2012 |
10 pages |
| Authors:
Edward V White; BOEING CO ST LOUIS MO
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| Summary: Adaptive Structures (applied to large structures) requires technology development in three areas.: Compact, weight efficient variable geometry load paths, Large deformation/load bearing skins/fairings and Integrated/Distributed Actuation. Design of Adaptive Airframes must be performed as part of system level trade studies and optimization. The development of tools (particularly objective functions) to do this lags significantly behind the research SOA. Multifunctional design is both the savior and the bane of Adaptive ... |
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| Strain- and Temperature-Dependence of Electromagnetic Metamaterials |
Aug 2012 |
15 pages |
| Authors:
Brandon Arritt; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
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| Analytic Expressions are powerful tools for describing metamaterial strain/temp-dependence: - Provide insight into physics behind linkage; - Enable accurate prediction over the continuum of strains/temps; - Rapid description of properties; 10(exp 5) redux in model complexity; - Rapidly predict strain/temp-dependence for unit cells in same design family. Analytic Expressions enable efficient determination of EM(Electromagnetic) performance of large structures, with multiple unit cell designs, under complicated strain/temp profiles. Care must be ... |
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| Self-Assembly and Self-Repair of Structures with Stability and Resource Constraints |
Aug 2012 |
22 pages |
| Authors:
Nikolaus Correll; COLORADO UNIV AT BOULDER DEPT OF COMPUTER SCIENCE
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| Flame and Blast Resistant Materials for Force Protection |
29 Jun 2012 |
34 pages |
| Authors:
Charles A Wilkie; MARQUETTE UNIV MILWAUKEE WI
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| This report is concerned with the development of a fire retarded blast resistant polyurea. Any blast resistant material must offer protection not only against a blast but also against the possibility of an accidental fire. In this project more than fifty different materials were investigated but alone and in a variety of combinations to determine the best system to offer fire protection to polyurea. The various formulations were initially evaluated ... |
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| Unusual Thermal Stability of High-Entropy Alloy Amorphous Structure |
20 Jun 2012 |
18 pages |
| Authors:
Jien-Wei Yeh; NATIONAL TSING HUA UNIV HSINCHU (TAIWAN)
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| NbSiTaTiZr alloy was designed to have two combined effects: high entropy effect and large atomic size effect which are intended to give unusual thermal stability of amorphous structure. The outcome is that the amorphous structure of deposited alloy film on sapphire substrate can be retained even annealed at 850 ?C for at least 3 h. If substrate effect could be eliminated, the crystallization temperature would be higher. |
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| Design, Fabrication and Testing of Tunable RF Meta-atoms |
14 Jun 2012 |
198 pages |
| Authors:
Derrick Langley; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| Metamaterials are engineered structures designed to alter the propagation of electromagnetic waves incident upon the structure. The focus of this research was the effect of metamaterials on electromagnetic signals at radio frequencies. RF meta-atoms were investigated to further develop the theory, modeling, design and fabrication of metamaterials. Comparing the analytic modeling and experimental testing, the results provide a deeper understanding into metamaterials which could lead to applications for beam steering, ... |
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| Real Time Detecting and Processing Signals by an Integrated Sensor Chip Based on Meta-materials and Photonic Crystals |
29 May 2012 |
38 pages |
| Authors:
Dennis W Prather; DELAWARE UNIV NEWARK
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| This effort has been realized to advance the U.S. Navy's vision of an integrated ship topside, where the elements detecting, guiding, processing, and radiating signals become an integral part of the ship's structure. The integrated signal processing structure must also meet structural and design requirements: signature control, isolation, weight reduction, and a low observable (LO) profile. To fulfill these requirements, several different technological phases are used including dielectric waveguides and ... |
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| Reducing Hazardous Emissions at Anniston Army Depot |
May 2012 |
25 pages |
| Authors:
Jack Kelley; Wayne Ziegler; ARMY RESEARCH LAB ADELPHI MD
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| Anniston Army Depot (ANAD) performs depot level maintenance for combat tanks, tracked combat vehicles, small arms weapons and components, and optical and electronic fire control systems. ANAD has a large production capability, including painting, depainting, surface cleaning, and plating, which makes ANAD a major emitter of hazardous air pollutants (HAPs). In order to reduce hazardous emissions at ANAD and to address environmental regulations and mandates, ARL and the NDCEE directly ... |
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| Three-Dimensional Approaches to Assembling Negative Index Metamedia |
02 Apr 2012 |
20 pages |
| Authors:
Roberto D Merlin; MICHIGAN UNIV ANN ARBOR DEPT OF PHYSICS
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| This report describes progress accomplished in the past 5 years in the areas of (i) the design of plasmonic near-field plates for visible operation and corrugated near-field plates for point focusing; (ii) synthesis of gold nanoparticle patterns; (iii) persistent tuning of metamaterials properties; (iv) experimental demonstration of the magnetic moment of a self-assembled cluster of plasmonic nanoparticles; (v) focused-ion-beam synthesis of nanostructure arrays; (vi) search for negative index in chiral ... |
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| Structure and Spectroscopy of Buried Interfaces in Organic Thin Films and Colloids |
01 Mar 2012 |
7 pages |
| Authors:
Hai-Lung Dai; TEMPLE UNIV PHILADELPHIA PA
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| A major accomplishment of this project has been that we have resolved nearly all the fundamental problems and demonstrated Second Harmonic Generation as an effective and versatile method for characterizing the solid-liquid interfaces of micron to nanometer size particles buried deep in colloids. We have shown for the first time that SHG from the surface of silver nanoparticles can be detected, and through monitoring the second harmonic light scattering we ... |
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| Development of a Radar-Frequency Metamaterial Measurement and Characterization Apparatus |
Mar 2012 |
215 pages |
| Authors:
Stephen I Faris; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The overall purpose of this research was to design, build, and test an apparatus for the measurement and characterization of radar-frequency metamaterial performance in the S-band through Ku-band (2-18 GHz). Measurement and characterization is vital to metamaterial taxonomy and ultimately vital to metamaterial definitions. Thus, the current lack of clarity in metamaterial definitions has served as the primary motivation for pursuing a method for taxonomy and thus, this apparatus. The ... |
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| An Automated Multi-Modal Serial Sectioning System for Characterization of Grain-Scale Microstructures in Engineering Materials (Preprint) |
Mar 2012 |
11 pages |
| Authors:
Michael Uchic; Michael Groeber; Jonathan Spowart; Megna Shah; Michael Scott; Patrick Callahan; Adam Shiveley; Michael Chapman; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIR METALS CERAMICS AND NONDESTRUCTIVE EVALUATION DIV/METALS BRANCH
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| This paper describes the development of a new serial sectioning system that has been designed to collect microstructural, crystallographic, and chemical information from volumes in excess of 1 cu mm. The system integrates a robotic multi-platen mechanical polishing system with a modern SEM that enables the acquisition of multi-modal data--scanning electron images, EBSD and hyperspectral EDS map--at each section. Selected details of the system construction as well as an initial ... |
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| Direct Digital Manufacturing of Integrated Naval Systems Using Ultrasonic Consolidation, Support Material Deposition and Direct Write Technologies |
17 Feb 2012 |
30 pages |
| Authors:
Brent E Stucker; Ryan Wicker; UTAH STATE UNIV LOGAN
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| This project enabled the integration of ultrasonic consolidation, direct write dispensing, and material deposition technologies into a manufacturing workcell capable of fabricating advanced, integrated Naval-relevant structures. The workcell was shown to be capable of spatial composition control and complex internal geometries - including embedded electronics, thermal management, reinforcement fibers and other features - along with the resolution, scalability, repeatability, dimensional accuracy and surface finish of milling, all within an integrated ... |
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| Pulsed Laser Deposition of YBCO With Yttrium Oxide Buffer Layers (Postprint) |
Feb 2012 |
12 pages |
| Authors:
Paul N Barnes; Timothy J Haugan; Nick A Yust; Juliana M Evans; Justin C Tolliver; Rama M Nekkanti; Lyle B Brunke; Iman Maartense; John P Murphy; Srinivas Sathiraju; UES INC DAYTON OH
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| Textured metallic substrate based HTS coated conductors with the YBCO/CeO2/YSZ/CeO2/Ni architecture have already been shown to exhibit high current densities. The CeO2 seed layer can effectively minimize the formation of NiO during the initial deposition on Ni and the CeO2 cap layer provides good lattice matching to the subsequent YBCO layer. However, there are reports of cracks developing in the CeO2 seed layer after a thicker growth due to a ... |
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| In-Situ Approach to Introduce Flux Pinning in YBCO (Postprint) |
Feb 2012 |
21 pages |
| Authors:
T J Haugan; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
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| Several in-situ methods to introduce ultra-high densities of defects into YBCO to enhance flux pinning are reviewed, including rare-earth or chemical substitution or additions, and nanoparticle additions by various processing methods. The results were compiled using studies published recently or that are publicly available. Superconducting and microstructural properties are compared for different nanoparticle additions including Y211, Y2O3, CeO2, Sm123, MgO, La211, IrZO3, BaZrO3, and mixed (Y,RE)123 compositions. Results are included ... |
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| Development of a High-Throughput Method for the Optical Screening of Phase Transformations Related to Amorphous Materials for Harsh Environment Applications |
Feb 2012 |
45 pages |
| Authors:
Alfred Ludwig; RUHR-UNIV BOCHUM INSTITUTE FOR MATERIALS
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| A method to systematically and efficiently search for new materials is to use thin-film combinatorics, which offers the great advantage of producing materials libraries with hundreds of samples on one substrate in a single experiment. Using a combinatorial approach together with high-throughput characterization methods should lead to faster results than using the conventional experimental strategies. This project's objective is to fabricate thin film materials libraries of amorphous materials which exhibit ... |
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| Correlation Between Physicochemical Characteristics and Toxicological Properties of Nanomaterials |
25 Jan 2012 |
45 pages |
| Authors:
Guenter Oberdoerster; Alison Elder; Jacob Finkelstein; Thomas Gunter; Jim McGrath; Todd Krauss; Lisa DeLouise; Amber Rinderknecht; Zhihui Ban; David Pui; Da-Ren Chen; Seong Chan Kim; Chaolong Qi; Pratim Biswas; Daren Chen; Zhu Liying; Chen Xu; Jiang Jingkum; Manoranjan Sahu; Fan Mei; ROCHESTER UNIV MEDICAL CENTER NY
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| Research Summaries: Nanotoxicology: An emerging discipline evolving from studies of ultrafine particles; Translocation of inhaled ultrafine manganese oxide particles to the central nervous system; Nanoparticle (NP) uptake by type I alveolar epithelial cells and their oxidant stress response; Toxicology of nanoparticles: A historical perspective; In vivo skin penetration of quantum dot nanoparticles in the murine model: The effect of UVR; Testing nanomaterials of unknown toxicity: An example based on Platinum ... |
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| Design of Novel Flame Retardant Materials that Operate through Synergistic Mechanisms |
20 Jan 2012 |
15 pages |
| Authors:
Ramaswamy Nagarajan; Jayant Kumar; MASSACHUSETTS UNIV LOWELL
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| To understand the influence of structure of polyphenol on the flame retardant characteristics, phenols containing different types of substituents were polymerized and characterized. The nature and position of the substituent on the phenol was controlled to facilitate the coupling of through specific positions to yield polyphenols with enhanced stability and/or flame retardant characteristics. In addition, the role of temperature in minimizing side reactions and formation of low molecular weight oligomers ... |
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| Altering Plasmonic Nanoparticle Size Through Thermal Annealing for Improved Photovoltaic Devices |
Jan 2012 |
22 pages |
| Authors:
Rukshan Fernando; Fred Semendy; Priyalal Wijewarnasuriya; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
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| We created gold (Au) and silver (Ag) nanoparticles by e-beam deposition on an n-type silicon substrate followed by rapid thermal annealing (RTA) under nitrogen gas. Thermal annealing was performed in two ways: first by varying temperature for a constant time and second by varying time at a constant temperature. RTA under the right eutectic temperature, which varies metal to metal, should create nano-metal particles on the substrate. These nanoparticles were ... |
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| Nanoparticle Additives for Multiphase Systems: Synthesis, Formulation and Characterization |
Jan 2012 |
179 pages |
| Authors:
Vinod Kanniah; KENTUCKY UNIV LEXINGTON
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| Study on nanoparticle additives in multiphase systems (liquid, polymer) are of immense interest in developing new product applications. Critical challenges for nanoparticle additives include their synthesis, formulation and characterization. These challenges are addressed in three application areas: nanofluids for engine lubrication, ultrathin nanocomposites for optical devices, and nanoparticle size distribution characterization. Nanoparticle additives in oligomer mixtures can be used to develop extended temperature range motor oils. A model system includes ... |
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| Moving beyond Mass: The Unmet Need to Consider Dose Metrics in Environmental Nanotoxicology Studies |
Jan 2012 |
3 pages |
| Authors:
M Hull; A J Kennedy; C Detzel; P Vikesland; M A Chappell; ARMY CORPS OF ENGINEERS VICKSBURG MS ENGINEER RESEARCH AND DEVELOPMENT CENTER
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| The field of nanotechnology has rapidly developed due to recognition that nanoscale particles often exhibit properties that differ substantially from comparable bulk phases. Given this fact it is unfortunate that the environmental nanotoxicology community continues to rely heavily upon mass-based dosemetrics. To truly evaluate if nanoscale particles elicit toxicological responses that differ from those of bulk phases then alternative dose-metrics must be simultaneously considered. |
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| Investigation of Dispersion, Stability, and Tribological Performance of Oil-Based Aluminum Oxide Nanofluids |
Jan 2012 |
86 pages |
| Authors:
Steven J Thrush; OAKLAND UNIV ROCHESTER MI DEPT OF MECHANICAL ENGINEERING
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| The term nanofluid was first proposed by Choi in 1995 and has been studied ever since due to their unique characteristics. Despite their great promise for thermal and tribological properties, the issue of preparing stable and well-dispersed solutions has been the major problem with this new classification of fluid. In this study, the effects of different dispersion procedures and methods on the stability of oil-based Al2O3 nanofluids were investigated. Sample ... |
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| Immobilization of Platinum Nanoparticles on 3,4-diaminobenzoyl-Functionalized Multi-Walled Carbon Nanotube and its Electrocatalytic Activity |
Jan 2012 |
12 pages |
| Authors:
Hyun-Jung Choi; Ji-Ye Kang; In-Yup Jeon; Soo-Mi Eo; Loon-Seng Tan; Jong-Beom Baek; ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY (KOREA SOUTH)
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| Multi-walled carbon nanotubes (MWCNTs) are functionalized at the sp2 C-H defect sites with 3,4-diaminobenzoic acid by a direct Friedel-Crafts acylation reaction in a mild polyphosphoric acid/ phosphorous pentoxide medium. Owing to enhanced surface polarity, the resulting 3,4-diaminobenzoylfunctionalized MWCNTs (DAB-MWCNT) are highly dispersible in polar solvents, such as ethanol N-methyl-2-pyrrolidone, and methanesulfonic acid. The absorption and emission properties of DABMWCNT in solution state are qualitatively shown to be sensitive to the ... |
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| Materials Testing Capabilities |
07 Dec 2011 |
10 pages |
| Authors:
Mu-Jen Yang; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| The objective of this task is to compile a list of materials testing capabilities suitable for testing the materials development for liquid rocket engines by the JANNAF liquid propulsion community in USA. Information has been collected on the materials testing capabilities in some of the commercial testing laboratories, academic research and development institutes, and government organizations; it has been compiled, and has been listed in Tables I, II and III, ... |
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| Properties and Applications of Lossy Metamaterials |
Dec 2011 |
97 pages |
| Authors:
Christos Doumenis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The complex permittivity ( ) and permeability ( ) of a material determines the response of the material to electromagnetic radiation. In many cases, the real part of and are both positive for materials that can be found in nature. Metamaterials (MTMs) are engineered media that are designed to have either a negative permittivity or a negative permeability or both. Negative permittivity and permeability cause electromagnetic waves travelling through this ... |
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| Chemical and Materials Information Management to Achieve Sustainable Engineering and Design for the 21st Century |
Nov 2011 |
13 pages |
| Authors:
Wayne Ziegler; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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| There are several challenges to the implementation of environmentally preferred alternative technologies specifically related to chemical and materials information quality and availability. Identifying potential restricted materials and implementing alternative technologies is a risk management decision for a program manager and should be based on trusted information sources. A gap analysis of the DoD's current materials development and implementation process indicates that there is a lack of exchange of materials and ... |
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| Investigation of Elastocil M4370 Silicone Rubber Release Agent for Use on M1130 Projectile |
Oct 2011 |
15 pages |
| Authors:
John F Osterndorf; Richard Wu; Daniel Murphy; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ ENERGETICS WARHEADS AND MANUFACTURING TECHNOLOGY DIRECTORATE
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| An investigation of two release agents Miller Stevenson's MS-143DF Polytetrafluoroethylene (PTFE) Release Agent- Dry Lubricant and Vaseline 100% Pure Petroleum Jelly] to create a separation in the room temperature vulcanizing (RTV) above the interface of the explosive and RTV to prevent the cracking of the explosive below the interface with the RTV. Test specimens were fabricated and subjected to various environmental conditions to determine if the RTV will remain separate ... |
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| Multi-Scale Prediction and Simulation of Localization Banding in Granular Media |
30 Sep 2011 |
7 pages |
| Authors:
Jose E Andrade; Ted Belytschko; NORTHWESTERN UNIV EVANSTON IL
|
| Shear bands are a critical factor in the response of granular materials, such as soils, rocks, and concrete. The objective of this research is to develop methods for accurately predicting the onset and propagation of deformation bands in granular media under extreme environments by developing an efficient multiscale simulation framework. The goal is to bridge continuum scale methods with the existing discrete methods to obtain an accurate multiscale model that ... |
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| Patients Presenting with Miliaria While Wearing Flame Resistant Clothing in High Ambient Temperatures: A Case Series |
22 Sep 2011 |
18 pages |
| Authors:
III Carter Robert; Anisa M Garcia; Brian E Souhan; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
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| Clothing can be a cause of occupational dermatitis. Frequent causes of clothing-related dermatological problems can be the fabric itself and/or chemical additives used in the laundering process, friction from certain fabrics excessively rubbing the skin, or heat retention from perspiration-soaked clothing in hot working environments. To the best of our knowledge, these are the first reported cases of miliaria rubra associated with prolonged use of flame resistant clothing in the ... |
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| Synthesis of Gold and Silver Nanoparticles and Characterization of Structural, Optical, and Electronic Properties |
Sep 2011 |
22 pages |
| Authors:
Eric N Lee; Mark H Griep; Shashi P Karna; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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| Metallic nanoparticles, most notably gold and silver, portray multiple structural, optical, electronic, and photoelectric properties, all of which often vary with particle diameter. When synthesized as alloys, as compared to purely monometallic particles, changes in the synthesis procedure and conditions can yield entirely unique particles with variable absorbance levels, sizes, and emission intensities, and stronger characteristics much more suited for use in electronic applications. Through solution-phase synthesis and replacement-reaction synthesis, ... |
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| Military Specification Updates & Deicing Working Group Initiatives |
18 Aug 2011 |
12 pages |
| Authors:
Michael Sanders; AIR FORCE PETROLEUM AGENCY FORT BELVOIR VA
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| Creation and testing of novel nanocomposite coatings that minimize both ice accretion and adherence to military topcoat surfaces. Approach uses ultrahydrophobic additives in coatings and be compatible with existing A/C topcoats (MIL-PRF-85285). Demonstrate effectiveness of novel ultrahydrophobic coating formulation for icephobic activity in collaboration with industrial partner (The Goodrich Corporation). Must not alter existing A/C topcoat/coating system properties (i.e. optical props, color, surface smoothness). Must be environmentally benign. Benefits/Impacts: Reduce ... |
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| Extensive Characterization of Cracking in As-fabricated Composite Ceramic Panels Via Ultrasonic and X-ray Computed Tomography Testing |
Aug 2011 |
22 pages |
| Authors:
William H Green; Raymond E Brennan; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Decreasing the weight of protective systems, while minimizing the decrease in ballistic performance, is an ongoing goal of the Army. Ceramic materials are currently combined with other materials in these types of structures in order to decrease weight without losing ballistic performance. This includes structures in which the ceramic material is confined in some way or completely encapsulated. Confinement or encapsulation of ceramic material within a structure generally adds complexity ... |
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| Large-Area Flexible 3D Optical Negative Index Metamaterial Formed by Nanotransfer Printing |
JUL 2011 |
17 pages |
| Authors:
Debashis Chanda; Kazuki Shigeta; Sidhartha Gupta; Tyler Cain; Andrew Carlson; Agustin Mihi; Alfred J. Baca; Gregory R. Bogart; Paul Braun; John A. Rogers; NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA
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| Negative-index metamaterials (NIMs) are engineered structures with optical properties that cannot be obtained in naturally occurring materials. Recent work has demonstrated that focused ion beam and layer-by-layer electron-beam lithography can be used to pattern the necessary nanoscale features over small areas (hundreds of sq microns) for metamaterials with three-dimensional layouts and interesting characteristics including negative-index behaviour in the optical regime. A key challenge is in the fabrication of such three-dimensional ... |
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| Technical Operations Support III (TOPS III). Delivery Order 0081: Novel Pitch Materials for High Thermal Conductivity Carbon Fibers, Foams and Composites - Phase 3 |
JUN 2011 |
30 pages |
| Authors:
Amod A. Ogale; CLEMSON UNIV SC
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| The overall goal of this project was to control nanotexture of pitch precursors by the introduction nanomodifiers of different aspect ratios, thereby modifying the structure of the resulting fibers. The specific objectives were to: (i) Characterize the dispersion of nanoparticles and the microstructure of the fibers; (ii) Quantify the effect of nanomodification on fiber mechanical properties; and (iii) Develop an experimental protocol to measure and model the high thermal conductivity ... |
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| European Command Hazardous Material Management Program |
12 May 2011 |
29 pages |
| Authors:
Kurt P Lengert; UNITED STATES EUROPEAN COMMAND APO NEW YORK 09128
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| Mission: Review Compliance with Dangerous Goods requirements in transportation and the movement control system; Achieve standardization of compliance requirements within the theater to include international standards as applicable; Analyze impact to the EUCOM mission upon implementation of requirements set forth in the European Program on Registration, Evaluation, and Authorization of Chemicals (REACH) as identified in the DoD Strategic Plan on REACH, and other applicable programs, i.e., the Globally Harmonized System ... |
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| Optimization of One-Dimensional Aluminum Foam Armor Model for Pressure Loading (Briefing charts) |
12 APR 2011 |
17 pages |
| Authors:
John C. Goetz; Andres Tovar; John Renaud; NOTRE DAME UNIV IN
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Miscellaneous Materials
