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Displaying 5601 - 5625 of 13218

Building a Spring-Transport Mechanism for Spinning Rotor Gauges

April 3, 2015
Author(s)
James A. Fedchak, Julia K. Scherschligt, Makfir Sefa, Nick Phandinh
… rotor gauges (SRGs) are widely used as transfer standards in inter-laboratory comparisons and as secondary standards by calibration laboratories. In both of these applications, it is necessary to ship the … is a device used to immobilize the SRG and keep it in vacuum during transport. This shop-note describes the …

HVACR Editorial for IAQ 2013 Special Issue

January 23, 2015
Author(s)
Hal Levin, Steven Emmerich
… The papers in this issue were selected from presentations made at the ASHRAE IAQ 2013: Environmental Health in Low Energy Buildings conference held in Vancouver Canada in October 2013. The conference was held … Science and Technology for the Built Environment …

Gain and Loss in active waveguides based on lithographically defined quantum dots

June 1, 2014
Author(s)
Kevin L. Silverman, Luis Miaja Avila, Varun B. Verma, Richard P. Mirin, James J. Coleman
… dots. Lasing action has previously been demonstrated in a nominally identical structure. Measurements are made by … is insufficient for ground state lasing to be achieved in a structure with as-cleaved facets, but the gain per dot is comparable with that demonstrated in self- assembled quantum dots. …

Hydrogen traps in the outgassing model of a stainless steel vacuum chamber

March 31, 2014
Author(s)
Robert F. Berg
… geometry of the chamber components, the hydrogen dissolved in those components, and the processes of diffusion, … object. 2. The hydrogen initially dissolved in each component was described as a uniform concentration. … values were used to describe diffusion and recombination in stainless steel types 304 and 316 [Grant et al., J. …

Top-Down Fabrication of Large-Area GaN Micro and Nano Pillars

February 19, 2014
Author(s)
Albert Davydov, Ratan K. Debnath, B. Wen, Dipak Paramanik, Abhishek Motayed, M. King
… measurements reveled significant strain relaxation in 250 nm diameter etched pillars as compared to 10 um … due to plasma etch can be removed by subsequent etching in KOH-ethylene glycol solution. Post plasma etch chemical … and nano-disks of GaN, which could be potentially useful in nitride-based resonators and lasers. …

Modeling a Nationwide Public Safety Broadband Network

June 1, 2013
Author(s)
Richard A. Rouil, Antonio Izquierdo Manzanares, Michael R. Souryal, Camillo Gentile, David W. Griffith, Nada T. Golmie
… challenges of modeling and planning for a country diverse in terms of terrain, user density, and public safety needs. … and site assumptions) can be readily assessed in a timely fashion. The approach utilizes a clustering … IEEE Transactions on Vehicular Technology …

Formation of large-area GaN nanostructures with controlled geometry and morphology using top-down fabrication scheme.

June 26, 2012
Author(s)
Dipak Paramanik, Abhishek Motayed, Geetha G. Aluri, Sergiy Krylyuk, Albert Davydov
… We found that nitrogen plays a significant role in fabricating high quality etched GaN nanostructures. In this paper we present the effects of variations of the … erosion, and surface roughness. Dominant etch mechanisms in relation to the observed characteristics of the etched …

Real-time measurements of plasma photoresist modifications: The role of plasma vacuum ultraviolet radiation and ions

May 23, 2012
Author(s)
Weilnboeck Florian, Nirav Kumar, Gottlieb Oehrlein, Ting-Ying Chung, D Graves, Mingqi Li, Eric A. Hudson, Eric C. Benck
… of plasma radiation and ions with 193nm PR and 248nm PR in Ar plasma by in-situ ellipsometry. Ellipsometry provides valuable information on changes in film thickness and material optical properties in … Journal of Vacuum Science and Technology B …

Development of a combinatorial characterization scheme for high-throughput investigations of hydrogen storage materials.

December 16, 2011
Author(s)
Jason Hattrick-Simpers, Z. Tan, H. Oguchi, Chun Chiu, Edwin J. Heilweil, James E. Maslar, Leonid A. Bendersky
… In order to reliably increase the throughput of materials … measures the hydrogen storage properties of materials in quantities ranging from 10 nanogram to 1 g. Initial … properties probed via parallel in situ Raman spectroscopy. Final confirmation of the … Science and Technology of Advanced Materials …

Formation and transfer of GaAsN nanostructure layers

September 27, 2011
Author(s)
Christopher L. Soles, Hyun W. Ro, A. Wood, N. Estrada, B. Dick, Y. Wang, Micheal Thouless, Rachel Goldman
… (approaching the exciton Bohr radius) embedded in a solid-state matrix have great potential for … nanocrystallites with various functional substrates. In particular, we achieved simultaneous nanostructuring and … Journal of Vacuum Science and Technology A …

Gallium nitride nanowire electromechanical resonators with piezoresistive readout

August 11, 2011
Author(s)
Kristine A. Bertness, Jason M. Gray, Norman A. Sanford, Charles T. Rogers
… The naturally occurring range of NW diameters results in lowest beam resonances in the range of 9-36 MHz, consistent with a Young’s … dominant role of the polycrystalline metallic end clamps in the room-temperature mechanical dissipation. … Journal of Vacuum Science and Technology B …

Effect of resist on the transfer of line-edge roughness spatial metrics from mask to wafer

November 11, 2010
Author(s)
Patrick P. Naulleau, Gregg M. Gallatin
… for distinguishing mask effects from resist effects in experimental results. But the evaluation of stochastic effects in the resist itself demonstrate that such a test would only be viable in cases where the resist effects are completely negligible … Journal of Vacuum Science and Technology B …

Noise-Parameter Measurements with a Reflection Type Phase Shifter

November 1, 2010
Author(s)
Dazhen Gu, Dave K. Walker, James P. Randa
… We report a miniaturized phase shifter operating in the frequency range from 5 GHz to 7 GHz for … solid-state unit represents a significant reduction in the size and mass as a source-pull component, compared to … Microwave and Optical Technology Letters …

A Focused Chromium Ion Beam

October 21, 2010
Author(s)
Adam V. Steele, Brenton J. Knuffman, Jabez J. McClelland, Jon Orloff
… demonstrated nanoscale focusing of chromium ions produced in a magneto-optical trap ion source (MOTIS). Neutral … radius as small as 205(10) nm. While this probe size is in the useful range for nanoscale applications, it is almost … Journal of Vacuum Science and Technology B …

An example crossover experiment for testing new vicarious calibration techniques for satellite ocean color radiometry

October 1, 2010
Author(s)
Kenneth Voss, Scott McLean, Stephanie J. Flora, Michael Feinholz, Mark A. Yarbrough, Charles Trees, Mike Twardowski, Dennis Clark, Marlon Lewis, B. Carol Johnson
… technique with the established MOBY measurement. We found in the laboratory that the radiance and irradiance … estimated uncertainties for various spectral sources. In the field, the sensors measuring the above surface … downwelling irradiance performed as well as they had in the laboratory. However, the water-leaving radiance, Lw, …

Atomistic Factors Governing Adhesion between Diamond, Amorphous Carbon, and Model Diamond Nanocomposite Surfaces

October 1, 2010
Author(s)
Pamela L. Piotrowski, Rachel J. Cannara, Guangtu Gao, Joseph J. Urban, Robert W. Carpick, Judith A. Harrison
… surfaces paired with other carbon-based materials. In the AFM experiments, the work of adhesion between an … on adhesion of variables that are not easily changed in an experiment, including hydrogen coverage, … which more closely modeled the AFM experiment, resulted in adhesion reductions when paired with both …
Displaying 5601 - 5625 of 13218
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