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Displaying 35976 - 36000 of 74141

Josephson junctions with nearly superconducting metal silicide barriers

November 23, 2005
Author(s)
Yonuk Chong, Nicolas Hadacek, Paul Dresselhaus, Charles J. Burroughs, Burm Baek, Samuel Benz
We present a detailed study of the electrical properties of Nb-based planar Josephson junctions with superconducting metal silicide barriers, TiSi2 and WSi2. While these non-hysteretic junctions are useful for voltage standard applications, they are also

Effect of Nitrogen on Band Alignment in HfSiON Gate Dielectrics

November 22, 2005
Author(s)
Safak Sayan, Nhan V. Nguyen, James R. Ehrstein, James J. Chambers, Mark R. Visokay, Manuel Quevedo-Lopez, Luigi Colombo, T Yoder, Igor Levin, Daniel Fischer, M Paunescu, Ozgur Celik, Eric Garfunkel
We have studied the band alignment of HfSiO and HfSiON films by soft x-ray photoemission (SXPS), oxygen K-edge x-ray absorption (XAS), and spectroscopic ellipsometry. Nitridation of HfSiO reduced the band gap by 1.50+- 0.05eV and the valence and conduction

Report of the Working Group on Crystal Phase Identifiers 2005-3-21

November 20, 2005
Author(s)
David R Brown, Sidney Abrahams, Michael Berndt, John Faber, Vicky L. Karen, Sam Motherwell, Jean-Claude Toledano, Pierre Villars, John Westbrook, Brian McMahon
The International Union of Pure and Applied Chemistry (IUPAC) has been examining standards for the electronic representation of chemical information, and as part of this effort it has established a working group in conjunction with the USA National

DNA Identifications After the 9/11 World Trade Center Attack

November 18, 2005
Author(s)
Leslie G. Biesecker, Joan E. Bailey-Wilson, Jack Ballantyne, Howard R. Baum, Frederick R. Bieber, Charles Brenner, Bruce Budowle, John M. Butler, George Carmody, P. M. Conneally, Barry Duceman, Arthur Eisenberg, Lisa Forman, Kenneth K. Kidd, Beno? Leclair, Steven Niezgoda, Thomas J. Parsons, Elizabeth Pugh, Robert Shaler, Stephen T. Sherry, Amanda Sozer, Anne Walsh

Optical Bandgaps and Composition Dependence of Hafnium Aluminate Thin Films grown by Atomic Layer Chemical Vapor Deposition

November 17, 2005
Author(s)
Nhan V. Nguyen, Safak Sayan, Igor Levin, James R. Ehrstein, I.J.R. Baumvol, C. Driemeier, L Wielunski, Pui-Yee Hung, Alain C. Diebold
Hafnium-aluminate (HfAlO) films grown on Si by Atomic Layer Chemical Vapor Deposition (ALCVD) of different aluminum contents were investigated in this article. Vacuum Ultra-Violet Spectroscopic Ellipsometry (VUV-SE), high Resolution Transmission Electron

Wire Bonding Process Monitoring using Thermopile Temperature Sensor

November 17, 2005
Author(s)
Suman Shivesh, Michael Gaitan, Joshi Yogendra, George G. Harman
This work presents an approach to separate the thermal response due to ultrasonic excitation and ball deformation through a novel application of aluminum-polysilicon thermopile sensors under the bond pad. These integrated thermopile sensors measure

Decoherence in Josephson Qubits from Dielectric Loss

November 16, 2005
Author(s)
John M. Martinis, Ken B. Cooper, Robert Mcdermott, Matthias Steffen, Markus Ansmann, Kevin Osborn, Katarina Cicak, Seongshik Oh, David P. Pappas, Raymond Simmonds, Clare Yu
Dielectric loss from two-level states is shown to be a dominant decoherence source in superconducting quantum bits. Depending on the qubit design, dielectric loss from insulating materials or the tunnel junction can lead to short coherence times. We show

Gold Superfill in Sub-Micrometer Trenches: Experiment and Prediction

November 16, 2005
Author(s)
Daniel Josell, Daniel Wheeler, Thomas P. Moffat
Bottom-up deposition of gold in fine trenches, also called superfill, was recently demonstrated using a submonolayer coverage of preadsorbed, deposition-rate-accelerating lead followed by gold electrodeposition. The present study has used experiments on

Variations in Semiconducting Polymer Microstructure and Hole Mobility With Spin-Coating Speed

November 15, 2005
Author(s)
Dean M. DeLongchamp, Brandon M. Vogel, Youngsuk Jung, Curt A. Richter, Oleg A. Kirillov, Jan Obrzut, Daniel A. Fischer, S Sambasivan, Marc Gurau, Lee J. Richter, Eric K. Lin
Organic semiconductors permit low-cost processing methods such as spin-coating, dip coating, or ink-jet printing onto flexible substrates. However, the performance of these materials in devices is difficult to control and new processing methods can deliver

Carbon nanotube coated thermal detectors

November 14, 2005
Author(s)
John H. Lehman
Nearly all of the radiometric standards for laser power and energy measurements at NIST and elsewhere in the world are based on thermal detectors. These detectors usually rely on a thermal absorber coating to enhance the detector responsivity. Ideally the

Dielectric function of carbon nanotube coated thermal detectors

November 14, 2005
Author(s)
John H. Lehman
The absolute responsivity of a thermal detector depends on its absorption efficiency as a function of wavelength. We present experiments and document the results for carbon nanotube (CNT) based coatings for thermal detectors. The results indicate that the

Ultraviolet Laser Damage of Carbon Nanotube Coatings on Thermal Detector Platforms

November 14, 2005
Author(s)
Darryl A. Keenan, Natalia Varaksa, Anne Dillon, Chaiwat Engtrakul, Stephen E. Russek, John H. Lehman
We have initiated a program to demonstrate the next generation of optical detector coatings using carbon nanotubes (CNTs). These coatings have been used on a variety of detector platforms for laser power and energy measurement standards. These coatings
Displaying 35976 - 36000 of 74141
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