Award Data

WE PROPOSE TO APPLY A BIOTECHNOLOGY-BASED PROCESS TO MAKE NANOSTRUCTURES FOR OPTOELECTRONIC APPLICATIONS. THE RESULT WILL BE A UNIFORM ARRAY OF SILICON QUANTUM BOXES OF IDENTICAL DIMENSIONS IN A SILICON LAYER OF CONTROLLED THICKNESS. ALL THREE TECHNIQUES, CONTROLLED THICKNESS OF A CRYSTALLINE Si LAYER, FORMATION OF A UNIFORM ARRAY, AND ITS USE AS A PATTERN FOR REPLICATING A SEMICONDUCTOR ARRAY, HA ...

The proposed project will produce single-crystal boules of GaN that can be sliced and sold as high-quality substrates for the epitaxial growth of differently-doped GaN or of other lattice-matching crystals, or as wafers for use in optoelectronic and acoustooptic applications. The feasibility of GaN boules will be tested on a small scale: to produce cm3-sized crystals. The process will be scles up ...

Astralux, Inc. will develolp a seminconductor sensor sensitive to bacuum ultraviolet photons. For this, we shall synthesize a wide bandgap semiconductor capable of forming a built-in electric field that will separate the photogenerated electron-hole pairs and produce a photovoltage in response to the incident UV. This sensor should have no response to light in the visible spectrum. In this project ...

There is a market for a room temperature infrared detector as well as for a detection system which is radiation resistant and works at high temperatures and in reactive environments. Current infrared imaging technologies are too expensive and too bulky for these applications. We are proposing to develop an infrared and thermal detector based on a novel kind of light converter. The concept incorpor ...

The proposed research and development effort will explore the electroluminescene properties of rare earth elements in a III-V semiconductor. The technique of impact excitation, currently used in commercially available electroluminescent display devices, will be studied for exciting the rare earths. We have already demonstrated the possibility of generating visible light by hot electron impact exci ...

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RESIDUAL LIFETIME EVALUATION OF EXISTING NUCLEAR FACILITIES REQUIRES DETAILED INFORMATION REGARDING CONDITION OF CONTAINMENT AND SUPPORT STRUCTURES. CURRENT NONDESTRUCTIVE METHODS FOR SUBSURFACE EVALUATION OF REINFORCED CONCRETE USE COMPLEX EQUIPMENT AND RELY HEAVILY ON INTERPRETATION BY THE OPERATOR. A RESEARCH EFFORT IS PROPOSED TO EXAMINE THE USE OF COMPUTERIZED TOMOGRAPHIC IMAGING FOR LOCATING ...

This project will use sequencing by hybridization (SBH) to develop a faster, more economicalmethod for sequencing and mapping. Current DNA sequencing procedures almost universally require gelelectrophoresis of DNA fragments and are cumbersome and slow. SBH promises to produce rapidly largeamounts of sequence information due to the parallel nature of the analysis and is well suited forsequencing cD ...

RESEARCHERS ARE DEMONSTRATING THE POTENTIAL APPLICABILITY OF THE SPUTTER-INITIATED RESONANCE IONIZATION MICROPROBE (SIRIMP) TECHNIQUE FOR GEOLOGICAL STUDIES BY MEASURING PB ISOTOPE RATIOS AND U/PB ATOMIC RATIOS IN GEOLOGICAL SAMPLES RELEVANT TO GEOCHRONOLOGY. SIRIMP IS BASED ON THE CONCEPT OF RESONANCE IONIZATION OF SPUTTERED ATOMS AND POTENTIALLY OFFERS SEVERAL ADVANTAGES OVER CONVENTIONAL HIGH- ...

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