| Analysis and Design of Manycore Processor-to-DRAM Opto-Electrical Networks with Integrated Silicon Photonics |
24-Dec-2009 |
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| Authors:
Krste Asanovic; Vladimir Stojanovic; MASSACHUSETTS INST OF TECH CAMBRIDGE
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 | In this report we summarize the results of the investigation to improve the performance of manycore processors with silicon photonic networks for core-to-core and DRAM communication. Our findings indicate that in on-chip core-to-core networks, photonic Clos networks improve the energy-efficiency by 2-3x over other types of electrical networks while providing uniform bandwidth and latency over a range of different applications, at the fraction of the costs and with orders of ... |
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| Contacts to Semiconductor Nanowires |
03-Oct-2009 |
17 pages |
| Authors:
S E Mohney; PENNSYLVANIA STATE UNIV UNIVERSITY PARK OFFICE OF SPONSORED PROGRAMS
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 | Metal contacts to semiconductor nanowires share similarities with their thin-film counterparts, but they also exhibit important differences due to geometry. For example, in the formation of platinum silicide contacts to silicon nanowires, it is possible to achieve uniform platinum silicide/silicon segmented nanowires, but some ratios of platinum to silicon and annealing conditions lead to a peculiar kinking of the nanowires not analogous to the thin-film case. Also interesting is the ... |
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| Digital Control of Exchange Interaction in a Spin-based Silicon Quantum Computer |
07-Sep-2009 |
5 pages |
| Authors:
James C Sturm; Leonid P Rokhinson; PURDUE UNIV LAFAYETTE IN
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| The objective of the proposed work was to demonstrate that digital switching of the exchange interaction by real space electron transfer will provide a viable method for accurate control of inter-qubit interactions. In order to fix the strength of the exchange interaction at the fabrication stage we proposed a new technology for 3D confinement of electrons by abrupt epitaxial Si/SiGe interface. During the course of the project we developed CVD ... |
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| Simulation Concept - How to Exploit Tools for Computing Hybrids |
Jul-2009 |
53 pages |
| Authors:
Clare D Thiem; Joseph M Hertline; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
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| The Simulation Concept - How to Exploit Tools for Computing Hybrids (SCHETCH) project is exploring the design modeling and simulation (M&S) process for developing advanced computing technology for future intelligent systems. The desire is to integrate new alternative computing concepts with existing silicon-based computing technology in hybrid computing architectures. This interim report documents what progress has been made during the first two years of the effort. Literature reviews, past modeling ... |
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| Solution Deposition Methods for Carbon Nanotube Field-Effect Transistors |
Jun-2009 |
32 pages |
| Authors:
Matthew Ervin; Natalie Salaets; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
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| This study evaluated different methods for controlled deposition of carbon nanotubes (CNTs) from solution onto a silicon substrate to make CNT field-effect transistors (FETs). The goal of this deposition was to achieve reproducible device properties through more uniform CNT densities and other traits. This method serves as an easier, room temperature alternative to chemical vapor deposition growth. Three different types of CNT solutions were spun onto substrates: pristine tubes solubilized ... |
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| Nanodevices from Nanocomponents: Memory Logic and Mechanical Nanodevices |
11-May-2009 |
21 pages |
| Authors:
Charles J O'Connor; Jiye Fang; Leonard Spinu; Weilie Zhou; NEW ORLEANS UNIV LA
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| The purpose of this report is to document the results of the complete effort for this project, which was to investigate the development of nanodevices from nanoscale components. The project focused on exploring the possibilities of employing nanoparticles and other nanocomponents to fabricate nanodevices. The four main components of the project were: quantum dot memory devices, multilevel logic devices, electromechanical devices, and nanosensor devices. |
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| Crystallization Augmentation of Engineering Thermoplastics through Dispersion of Silicon-Containing Nanoparticles |
26-Apr-2009 |
3 pages |
| Authors:
Joseph M Mabry; Gregory R Yandek; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| The mechanical properties and environmental durability of engineering thermoplastics are generally dependent on their degree of molecular ordering. Processing conditions affect observed microstructures in this class of materials and costly annealing procedures can be required to generate adequate levels of crystallinity. It is therefore beneficial to not only develop an understanding of the fundamental physics governing ordering transitions, but to be able to use such knowledge to assert control over ... |
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| A Low-wear Planar-contact Silicon Raceway for Microball Bearing Applications |
Apr-2009 |
34 pages |
| Authors:
C M Waits; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
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| As silicon rotary micro-electromechanical systems (MEMS) devices become critical components to power generation and sensor platforms, it is crucial to develop bearing mechanisms that can achieve speed and reliability requirements without increasing cost and complexity. Microball bearings have proven simple to fabricate and capable of achieving high speeds. However, previous microball raceway implementations showed substantial degradation in performance and required cleaning steps to improve reliability. Furthermore, large surface roughness on ... |
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| High Temperature and Ultra-High-Temperature Ceramic Fibre Development and Applications (Preprint) |
17-Mar-2009 |
27 pages |
| Authors:
Edward J Pope; Chris Hill; Greg Staab; Nick Brabham; Jerry King; Bernie Morkunas; Tam Pham; Kenneth M Kratsch; MATECH ADVANCED MATERIALS WESTLAKE CA
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| Research covering SiNC, SiC and ultra-high-temperature (UHT) structural ceramic fibres, HfC and TaC, will be discussed. All four classes of preceramic polymers are melt-spun, cross-linked, and thermally treated yielding multi-hundred filament tow spool. Polysilazane based SiNC fibres are spun, at 500 filaments, in pilot quantity achieving tensile strength between 2.0-2.5 GPa. Minimal oxygen incorporation, 2%, has lead to promising high temperature creep and thermo-chemical stability up to 1400 degrees C. ... |
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| Patterning and Characterization of Carbon Nanotubes Grown in a Microwave Plasma Enhanced Chemical Vapor Deposition Chamber |
Mar-2009 |
127 pages |
| Authors:
Mauricio Kossler; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT/DEPT OF ENGINEERING PHYSICS
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| This research studies the growth of carbon nanotubes from a nickel catalyst to be used on a field emission device. A triode structure was created to be able to patterned the CNTs to improve the emission of electrons. Studies are performed on the effects of hydrogen pretreatment on nickel catalyst of different thicknesses and deposition methods on a silicon substrate and how it will affect the growth of carbon nanotubes ... |
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| Utilizing Microelectromechanical Systems (MEMS) Micro-Shutter Designs for Adaptive Coded Aperture Imaging (ACAI) Technologies |
Mar-2009 |
131 pages |
| Authors:
Mary M Ledet; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The Air Force has long relied on surveillance for intelligence and strategic purposes. Most surveillance systems rely on a lensing system to acquire their images, most of which are in either the visible or infrared wavelengths. Because lensing systems can be expensive, obtrusive, or hard to maintain, researchers have designed adaptive coded aperture imaging (ACAI) as a replacement system. Coded aperture imaging(CAI) has been used in both the astronomical and ... |
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| Evaluation of a Portable Laser Depainting System |
05-Feb-2009 |
25 pages |
| Authors:
Marta A Jakab; SOUTHWEST RESEARCH INST SAN ANTONIO TX
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| SUMMARY: The laser was found to be efficient in removing CARC with coating removal rates comparable to those of sandblasting. Charring was observed in some cases during laser decoating, probably due to low laser fluence. Paint residue was found on the charred surface indicating incomplete paint removal. * Preliminary studies of selective coating removal showed that the laser can be optimized to remove the topcoat without damaging the primer layer. ... |
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| Electron Spins in Single Electron Transistors |
14-Jan-2009 |
6 pages |
| Authors:
Marc A Kastner; MASSACHUSETTS INST OF TECH CAMBRIDGE MA SCHOOL OF SCIENCE
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| Measurements of a single electron spin showed that the excited spin state in a GaAs single electron transistor can live for as long as 1s. However, the decoherence time in the excited state is known to be short, because of the coupling to nuclear spins. Therefore, single-electron transistors in Si quantum wells have been fabricated; it is possible in principle to make the decoherence time very long by using isotopically ... |
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| Flip Chip Bonding of 68 x 68 MWIR LED Arrays |
Jan-2009 |
6 pages |
| Authors:
Naresh C Das; Monica Taysing-Lara; Kimberley A Olver; Fouad Kiamilev; J P Prineas; J T Olesberg; E J Koerperick; L M Murray; Tom F Boggess; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
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| The flip chip bonding process is optimized by varying the bonding pressure, temperature, and time. The 68 68 mid wave infrared (MWIR) LED array was hybridized onto Si-CMOS driver array with same number of pixels. Each pixel has two indium bumps, one for cathode and another for anode. Both LED array and CMOS drivers have 15- m-square Indium bump contact pads. We used Karl Suss FC150 flip chip machine for ... |
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| Carbon Nanotube Array for Infrared Detection |
05-Dec-2008 |
17 pages |
| Authors:
Jimmy Xu; BROWN UNIV PROVIDENCE RI DIV OF ENGINEERING
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| We explore the basic science issues and device potential of our carbon nanotube-silicon (CNT-Si) heterojunctions for infrared photodetection. We focus on the underlying mechanism of infrared photocurrent response, which is elucidated by a detailed study of the dependence of the photocurrent on modulation frequency and intensity of the incident infrared radiation. The photocurrent generation is ascribed to the formation of the CNT-Si heterojunction, rather than the thermal gradient in the ... |
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| Direct Fabrication of a-Si:H Thin Film Transistor Arrays on Plastic and Metal Foils for Flexible Displays |
Dec-2008 |
6 pages |
| Authors:
S M O'Rourke; D C Morton; G B Raupp; N Colaneri; J Haq; S M Venugopal; D R Allee; J P Kaminski; R Naujokaitis; J Dailey; D Bottesch; M Marrs; B P O'Brien; S K Ageno; E J Bawolek; C Moyer; D E Loy; E W Forsythe; ARIZONA STATE UNIV TEMPE
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| In this paper we describe solutions to address critical challenges in direct fabrication of amorphous silicon thin film transistor (TFTs) arrays for high information content active matrix flexible displays for Army applications. For all flexible substrates a manufacturable handling protocol in automated display-scale equipment is required. For metal foil substrates the principal challenges are planarization and electrical isolation, and management of coefficient of thermal expansion induced stress (CTE mismatch) during ... |
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| Miniature and Molecularly Specific Optical Screening Technologies for Breast Cancer |
Oct-2008 |
33 pages |
| Authors:
Nirmala Ramanujam; DUKE UNIV DURHAM NC
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| The goal of this proposal is to harness the power of light to create miniature and molecularly specific optical technologies for breast cancer diagnosis and detection. The miniature technologies will leverage on millimeter scale silicon detectors and LEDs to make compact devices that can be used in a practical clinical setting for breast cancer detection. The features that will be exploited for optical detection/diagnosis of breast cancer will include the ... |
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| Nanovectors for Targeting and Delivery of Therapeutics to HER-2 NEU Positive Breast Cancer Cells |
Oct-2008 |
25 pages |
| Authors:
Rita E Serda; TEXAS UNIV HEALTH SCIENCE CENTER AT HOUSTON
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| Nanofabricated devices designed to carry drug and contrast agents to breast cancer cells are surface modified with targeting moieties that recognize unique or abundantly expressed molecules on the surface of tumor cells. However, major obstacles such as enzymatic degradation, uptake by professional phagocytes and the reticular endothelial system, and the vascular endothelium could hinder the ability of nanoparticles to reach the tumor site. To overcome these biological barriers, we have ... |
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| Initial Results on Rugged Low Power Compact Silicon MEMS Sensors for Use in Nuclear Explosion Monitoring |
30-Sep-2008 |
11 pages |
| Authors:
Ian M Standley; W T Pike; KINEMETRICS INC PASADENA CA
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| The Frozen Rock Experiment (FRE) was conducted in central Alaska in August 2006 to provide empirical data on seismically-estimated yield from explosions in frozen rock. Laboratory studies have demonstrated that frozen rock is significantly stronger than unfrozen rock, and it has been hypothesized that this increased strength, due to ice in the pores and cracks, can alter seismic yield. Central Alaska has abrupt lateral boundaries in discontinuous permafrost, and we ... |
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| Hydrophobic Silsesquioxane Nanoparticles and Nanocomposite Surfaces |
23-Sep-2008 |
13 pages |
| Authors:
Darrell Marchant; Ashwani Vij; Isha Vij; Scott Iacono; Joseph M Mabry; Brent D Viers; Wade W Grabow; Patrick N Ruth; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| Fluorinated Polyhedral Oligomeric Silsesquioxanes are hydrophobic nanoparticles. One compound, FD8T8, is ultrahydrophobic, possessing a water contact angle of 154-deg. This is believed to be the most hydrophobic and lowest surface tension crystalline substance known. Analysis of the x-ray crystal structure indicates a large number of Si-deg F contacts may lead to ultrahydrophobicity. |
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| Variation of Oxygen-to-Carbon Ratio in Oxyacetylene Flame |
Aug-2008 |
5 pages |
| Authors:
L V Saraf; K J Bunch; M H Engelhard; P L Gassman; BATTELLE PACIFIC NORTHWEST LABS RICHLAND WA
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| We present micro-structural and surface analysis of carbon soot using variation in C2H2 to O2 ratio in oxyacetylene flame torch. Preliminary analysis indicate that at higher oxygen content, formation of SiO2 nanotubes and amorphous-SiC like structure take place while at higher C2H2 flame content, we observe majority of amorphous carbon with an evidence of some amorphous sp3 hybridization. |
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| Optically Defined Chemical Functionalization of Silicon Nanomechanical Resonators for Mass Sensing |
Aug-2008 |
5 pages |
| Authors:
Jeffrey W Baldwin; Maxim K Zalalutdinov; Bradford B Pate; Michael J Martin; Brian H Houston; NAVAL RESEARCH LAB WASHINGTON DC
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| Nanomechanical resonators with their extremely small mass and high surface/volume ratio present a unique opportunity for mass sensing[1-4]. However, functionalization with selective vapor adsorptive functional groups has been an impediment to the realization of nanomechanical systems for mass sensing. Functional groups that adsorb analytes of interest should be patterned only on the nanoresonator itself, and should not be located on structural elements or micro-channel walls, which would greatly limit the ... |
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| Frequency Response of Nanoelectromechanical Cantilevers Operating in Fluid |
Aug-2008 |
5 pages |
| Authors:
Michael J Martin; Brian H Houston; NAVAL RESEARCH LAB WASHINGTON DC
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| Nano-electro-mechanical resonators used for sensing, data storage, and nano-fabrication applications are often operated as feed-back control systems. To determine the transfer function of silicon cantilevers with a width of 5.0 micrometer, a thickness of 800 nm, and lengths of 10, 15, 30, and 45 micrometer, the damping in air and liquid was simulated numerically using an integrated fluidstructure solver. Bode diagrams and Nyquist plots of the cantilever transfer function indicate ... |
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| Bio-Nanotechnology Infrastructure and Technology Oriented Research |
17-Jul-2008 |
14 pages |
| Authors:
W K Jones; FLORIDA INTERNATIONAL UNIV MIAMI ADVANCED MATERIALS ENGINEERING RESEARCH INST (AMERI)
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| FIU research concentrated in the following areas of development: nanoelectronics, bio-nanosensors, and nanomaterials, processes, and characterization. Five projects were supported: next generation information storage devices-both three-dimensional magnetic and protein-based, high power cold cathodes for microwave generators, carbon nanotube-based bio-sensors, silicon/polymer nanophotonics, and doped nanodiamonds and nanoceramic lasers for future devices. In magnetic storage devices, this work has resulted in patterned soft underlayer metallizations to localize the recording and sensitivity fields ... |
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| Development of Microdevices for Biomolecular Detection |
01-Jun-2008 |
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| Authors:
Scott R Manalis; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| Biosensors suitable for providing informed rapid treatment analysis for soldiers and real-time environmental monitoring of toxic agents were developed. In particular, glass encapsulated field-effect sensors that are chemically robust and batch-fabricated by a conventional 6" wafer process were developed and demonstrated for the following applications: (i) Polymerase Chain Reaction (PCR) product quantification, (ii) Integrated microelectronic device for label-free nucleic acid amplification and detection, and (iii) Monitoring of heparin and its ... |
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| Very Small Satellite Design for Space Sensor Networks |
01-Jun-2008 |
233 pages |
| Authors:
David J Barnhart; SURREY UNIV GUILDFORD (UNITED KINGDOM) SURREY SPACE CENTRE
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| An investigation of very small satellite miniaturisation techniques is presented, focusing on sub-kilogram technologies targeted at space sensor network applications. Distributed space mission concepts are emerging for scientific and remote sensing applications. This architecture will enable observation of real-time multi-point phenomena. Space economics and environmental concerns dictate a cost-effective mass-producible low-mass satellite for brief but essential missions in low Earth orbit. Very small satellite technologies have been investigated, assessed, and ... |
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| Bioinspired Routes to Lithium-Ion Conducting Polymers and Nanomembranes |
21 MAY 2008 |
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| Authors:
John Arnold; CALIFORNIA UNIV BERKELEY
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| This project involves a novel approach to the synthesis of new classes of materials designed to function as ion conducting systems. In particular, we are developing new methods to produce materials with new chemical characteristics which can be used to modulated electrical behavior on the nanoscale. The current phase of this proposed work is designed to identify promising candidates and to study the mechanism by which ions are transported though ... |
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| Surface Structure and Chemistry in the Epitaxial Growth of Cadmium Telluride on Silicon |
21 APR 2008 |
10 pages |
| Authors:
Michael Trenary; ILLINOIS UNIV AT CHICAGO CIRCLE DEPT OF CHEMISTRY
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| The goal of this project was to obtain an atomic-scale understanding of the surface processes that underlie the growth by molecular beam epitaxy (MBE) of HgCdTe on As-passivated Si surfaces. It is generally recognized that in MBE the first few monolayers determine the quality and structure of the final crystalline film. In principle, the methods of surface science can provide the critically needed information about the initial stages of film ... |
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| Electronics Devices and Materials |
17-Mar-2008 |
21 pages |
| Authors:
Justin Lorentzen; Milton Rebbert; Eric Jackson; Connie Kornegay; Scott Messenger; Jennifer Hite; Paul Marshall; John Neilson; SFA INC CROFTON MD
|
| During the past year, SFA, Inc., has conducted a broad range of research in the Naval Research Laboratory's (NRL) Electronics Science and Technology Division. This research was both theoretical and experimental involving the development of analytical, fabrication, diagnostic and characterization techniques. Several areas were emphasized: solid state electronics, semiconductor materials, biochemical sensors, opto-electronics, and a special emphasis was placed on silicon, III-V compound semiconductors, reliability physics of electronic devices and ... |
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| Two-Dimensional Electron Gas in Strained Silicon for Studying Ultra-Low Energy Electronic Processes |
10-Mar-2008 |
18 pages |
| Authors:
Ya-Hong Xie; Daniel Tsui; CALIFORNIA UNIV LOS ANGELES DEPT OF MATERIALS SCIENCE AND ENGINEERING
|
| The proposed research focuses on the fabrication of high mobility 2D electron gases or low density for the understanding of correlated electron behavior under extreme conditions: low temperature and high magnetic field. The experimental efforts are in 3 related topics: (1) fabricate 2DES in strained Si with the highest achievable electron mobility; (2) fabricate 2DES in strained Si with low electron density; and (3) explore alternative approaches for fabricating strained ... |
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| Towards Silicon-Based Longwave Integrated Optoelectronics (LIO) |
21-Jan-2008 |
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| Authors:
Richard A Soref; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE/ELECTROMAGNETICS TECHNOLOGY DIV
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| The vision of longwave silicon photonics articulated in the Journal of Optics A, vol. 8, pp 840-848, 2006 has now come into sharper focus. There is evidence that newly designed silicon-based optoelectronic circuits will operate at any wavelength within the wide 1.6 to 200 micrometers range. Approaches to that LWIR operation are reviewed here. A long-range goal is to manufacture LWIR OEIC chips in a silicon foundry by integrating photonics ... |
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| Preparation of Ultra Thin Polystyrene, Polypropylene and Polyethylene Films on Si Substrate Using Spin Coating Technology |
04 JAN 2008 |
29 pages |
| Authors:
Evgeniya Lock; Scott Walton; Richard Fernsler; NAVAL RESEARCH LAB WASHINGTON DC PLASMA PHYSICS DIV
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| Preparation of ultra thin polystyrene, polypropylene and polyethylene films on silicon substrate using the spin coating technique is discussed in this report. The influence of various process parameters on the obtained film quality including Si wafer preparation, choice of solvent, influence of the solution concentration on the coating and sample positioning on the spin coater are shown. The polymer film surface morphology, thickness and chemical composition were analyzed by atomic ... |
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| Thermocouple Interactions During Testing of Melt Infiltrated Ceramic Matrix Composites (Postprint) |
Jan-2008 |
12 pages |
| Authors:
R John; G Ojard; G Morscher; Y Gowayed; U Santhosh; J Ahmad; R Miller; PRATT AND WHITNEY AIRCRAFT GROUP EAST HARTFORD CT
|
| As high performance ceramic matrix composite systems, such as Melt Infiltrated (MI) SiC/SiC, are being considered for advanced gas turbine engine applications, the characterization of the material becomes more important. A series of test were conducted where Pt and Ni sheathed Pt thermocouples were used to monitor temperature for short and long duration fast fracture, fatigue and creep tests. While it is known that Si forms eutectics with Pt and ... |
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| Dynamic Probing of High Strain-Rate Laser-Driven Shock Waves in Materials |
20 DEC 2007 |
32 pages |
| Authors:
Todd Ditmire; TEXAS UNIV AT AUSTIN OFFICE OF SPONSORED PROJECTS
|
| Work under this grant was focused on the probing of fast dynamics induced by laser driven shock waves. These studies are motivated by the fact that a complete understanding of shock waves in materials requires comprehensive microscopic understanding of the compression wave. Under our ARO grant we undertook a series of experiments to develop ways of studying atomic scale motions in materials as a material undergoes very high strain rate ... |
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| Mid-Infrared MIS Light Emitter from Strained Ge on Si with Nano-Structure Enhancement |
20 NOV 2007 |
26 pages |
| Authors:
Chee Wee Liu; NATIONAL TAIWAN UNIV TAIPEI
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| This project involved the observations of near-infrared emissions from Si/Ge heterojunctions and Ge quantum dot metal-oxide-semiconductor light-emitting diodes. |
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| High-Assurance System Support through 3-D Integration |
09 NOV 2007 |
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| Authors:
Theodore Huffmire; Timothy Levin; Cynthia Irvine; Thuy Nguyen; Jonathan Valamehr; Ryan Kastner; Timothy Sherwood; NAVAL POSTGRADUATE SCHOOL MONTEREY CA CENTER FOR INFORMATION SYSTEMS SECURITY STUDIES AND RESEARCH
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| While hardware resources, in the form of both transistors and full microprocessor cores, are now fairly abundant, economic factors continue to prevent the integration into commodity parts of specialized hardware mechanisms required for secure processing. Multi-core processors, due to their wide adoption, impressive performance, and low cost, are very attractive platforms for computation. Unfortunately, highly secure processing of sensitive information on such platforms is extremely difficult to achieve due to ... |
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| Micro Chemical Oxygen-Iodine Laser (COIL) |
OCT 2007 |
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| Authors:
Carol Livermore-Clifford; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| It has been previously proposed to improve the performance and compactness of chemical oxygen-iodine lasers (COIL) through the replacement of some of their macroscale components with arrays of higher-performing microscale (MEMS) components. In this program, a MEMS singlet oxygen generator (SOG) to power a COIL laser was designed, microfabricated from silicon and glass wafers, and successfully demonstrated. The MEMS SOG contained an array of reaction channels for the chemical reaction ... |
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| Miniature and Molecularly Specific Optical Screening Technologies for Breast Cancer |
OCT 2007 |
40 pages |
| Authors:
Nirmala Ramanujam; DUKE UNIV DURHAM NC
|
| The goal of this proposal is to harness the power of light to create miniature and molecularly specific optical technologies for breast cancer diagnosis and detection. The miniature technologies will leverage on millimeter scale silicon detectors and LEDs to make compact devices that can be used in a practical clinical setting for breast cancer detection. The features that will be exploited for optical detection/diagnosis of breast cancer will include the ... |
|
| Microfabricated Multianalyte Sensor Arrays for Metabolic Monitoring |
01 SEP 2007 |
32 pages |
| Authors:
Michael V. Pishko; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
|
| Glucose sensor arrays were fabricated on gold electrodes on flexible polyimide sheets by cross-linking glucose oxidase and redox polymer using UV-initiated free radical reaction. Using conventional silicon fabrication methods, five-element array Au microdisks were initially fabricated using mid-UV photolithography. Active glucose oxidase were entrapped by hydrogel by UV-intiated photo polymerization with poly(ethylene glycol) diacrylate or PEG-DA on the array electrodes. The fabricated microarray sensors were individually addressable and with no ... |
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| Evaluation of Catalytic and Thermal Cracking in a JP-8 Fueled Pulsed Detonation Engine (Postprint) |
SEP 2007 |
15 pages |
| Authors:
Timothy M. Helfrich; Frederick R. Schauer; Royce P. Bradley; John L. Hoke; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
| Pulsed detonation engines (PDEs) depend on rapid ignition and transition from deflagration to detonation. The prospect of converting the PDE from experimental to operational use necessitates a considerable reduction in the time required to ignite and detonate a liquid hydrocarbon fuel in air, such as JP-8. This research effort is focused on PDE operation enhancements using dual detonation tube, concentric-counter-flow heat exchangers to elevate the fuel temperature levels sufficiently to ... |
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| Ion Beam Induced Softening of a Nanoelectromechanical Actuator |
09 AUG 2007 |
10 pages |
| Authors:
Jitendra Singh; INDIAN INST OF TECH NEW DELHI DEPT OF PHYSICS
|
| A novel method of engineering the mechanical properties of individual nanostructures is reported. The method of ion irradiation serves as a non-destructive tool to manipulate the spring constant values of isolated nanorods. The slanted Si nanorods were grown by glancing angle deposition (GLAD) technique on a patterned Si(100) substrate with tungsten posts arranged in a 1 micron x 1 micron square pattern. Another Cr nanorods sample were deposited over the ... |
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| Optoelectronic Circuits Using 2D and 3D Self-Collimation Photonic Crystals |
JUL 2007 |
50 pages |
| Authors:
Dennis W. Prather; DELAWARE UNIV NEWARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| In our effort to develop and demonstrate the design, fabrication, and experimental characterization of self-collimation photonic crystal devices (SCPhCs) in both 2D and 3D structures, we identified various tasks and goals towards achieving the proposed applications. Two-dimensional self collimation photonic crystal structures will be used for in-plane optical signal distribution and routing while three-dimensional structures will be used for out-plane signal distribution, to provide high-density optically interconnected optoelectronic PhC circuits ... |
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| Development of Compact Variable-Voltage, Bi-Directional 100KW DC-DC Converter |
Jun-2007 |
30 pages |
| Authors:
Maurice Weiner; Kuang Sheng; Hao Qian; Junhong Zhang; Wensong Yu; Jason Lai; Leonid Fursin; Ghassan Khalil; Terence Burke; Jian H Zhao; UNITED SILICON CARBIDE INC NEW BRUNSWICK NJ
|
| A Silicon based soft-switching bidirectional Direct Current-Direct Current has been successfully demonstrated. |
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| All Electrical Spin Detection in III-V Semiconductors |
02 MAY 2007 |
3 pages |
| Authors:
Ian R. Appelbaum; DELAWARE UNIV NEWARK
|
| The project goal, to demonstrate electrical detection of electron spin transport in a semiconductor, has been met. We have achieved a clear spin-valve effect in an in-plane magnetic field and coherent precession and Hanle effect in a perpendicular magnetic field using a silicon spin transport device. |
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| Structural and Electrical-Optical Characterizations of Semiconductor-Atomic Superlattice |
01 MAY 2007 |
18 pages |
| Authors:
Raphael Tsu; NORTH CAROLINA UNIV AT CHARLOTTE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The following work was accomplished under this funding: (A) Semiconductor-Atomic Superlattice (SAS) consisting of Si-Si/O/Si-Si as a period. By repeating, a superlattice, SL is formed. Oxygen is introduced by gas adsorption, resembling mono-oxide rather than SiO2 which cannot be epitaxial. This epi-system has a theoretical strain ~ 6%, which is not prohibitive. This SAS shows PL and EL ~2.3eV. Reverse current in I-V is reduced more than 2 orders of ... |
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| Localized Synthesis of Silicon Nanocrystals in Silicon-rich SiO2 by CO2 Laser Annealing |
01 MAY 2007 |
14 pages |
| Authors:
Gong-Ru Lin; NATIONAL CHIAO TUNG UNIV HSINCHU (TAIWAN) INST OF ELECTRO-OPTICAL ENGINEERING
|
| The optical properties of a SiOx film rapid-thermal-annealed "RTA" by CO2 laser are primarily investigated. The micro-photoluminescence "-PL" and HRTEM analysis indicate that the precipitation of random-oriented Si nanocrystals can be initiated when laser intensity "Plaser" larger than 4.5 kW/cm2. At Plaser of 6 kW/cm2, the Si nanocrystals exhibits a largest diameter of 8 nm and a highest density of 4.51016 cm-3, which emits strong PL at 790-825 nm. The ... |
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| Atomistic Calculation of Elastic Moduli in Strained Silicon |
APR 2007 |
12 pages |
| Authors:
Richard Zhu; Ernian Pan; Peter W. Chung; Xinli Cai; Kim M. Liew; Alper Buldum; AKRON UNIV OH DEPT OF CIVIL ENGINEERING
|
| Strained silicon is becoming a new technology in silicon industry where the novel strain-induced features are utilized. In this report we present a molecular dynamic prediction for the elastic stiffnesses C11, C12, and C44 in strained silicon as functions of the volumetric strain level. Our approach combines basic continuum mechanics with the classical molecular dynamic approach, supplemented with the Stillinger Weber potential. Using our approach, the bulk modulus, effective elastic ... |
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| Materials on the International Space Station Experiment (MISSE): Optical Analysis of Molecular Contamination on PEC1 Tray 2 |
20 FEB 2007 |
21 pages |
| Authors:
P. D. Fuqua; C. J. Panetta; J. D. Barrie; AEROSPACE CORP EL SEGUNDO CA
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| Silicon wafers were mounted on the exterior of the International Space Station as a part of MISSE. Post-flight ellipsometry and reflectometry were employed to show that the silicon wafers gained about a 420-A-thick layer of a silica-like contaminant with BRDF scatter values around 1 x l0% per steradian. |
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| MEMS and Nanotechnology Workshop: An Emerging Army Technology |
08-Feb-2007 |
17 pages |
| Authors:
Tom Meitzler; TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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| Introductory talk of the MEMS and Nanotechnology Workshop, focusing on microelectromechanical systems and Army applications. |
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| Fabrication of Highly Ordered Anodic Aluminium Oxide Templates on Silicon Substrates |
2007 |
6 pages |
| Authors:
A. Yin; M. Tzolov; D. Cardimona; L. Guo; J. Xu; BROWN UNIV PROVIDENCE RI DIV OF ENGINEERING
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| The controlled fabrication of highly ordered anodic aluminium oxide (AAO) templates of unprecedented pore uniformity directly on Si, enabled by new advances on two fronts -- direct and timed anodisation of a high-purity Al film of unprecedented thickness (50 micrometres) on Si, and anodizing a thin but pre-textured Al film on Si, has been reported. To deposit high-quality and ultra-thick Al on a non-compliant substrate, a prerequisite for obtaining highly ... |
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SILICON
