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Displaying 476 - 500 of 1184

Restructuring of Tungsten Thin Films Into Nanowires and Hollow Square Cross-Section Microducts

November 1, 2005
Author(s)
P. M. Parthangal, Richard E. Cavicchi, Christopher B. Montgomery, Shirley Turner, Michael R. Zachariah
We report on the growth of nanowires and unusual hollow microducts of tungsten by thermal treatment of tungsten films in a RF H2/Ar plasma at temperatures between 550-620 C. Nanowires with diameters of 10-30 nm and lengths between 50-300 nm were formed

The Ultra-Small-Angle X-Ray Scattering Instrument on UNICAT at the APS

October 1, 2000
Author(s)
Gabrielle G. Long, Andrew J. Allen, J Ilavsky, P R. Jemian, P Zchack
A new ultra-small-angle X-ray scattering (USAXS) instrument has been commissioned as part of the UNICAT facility on the 33-ID line at the Advanced Photon Source. The instrument offers continuously-tunable optics for anomalous USAXS, 1000 times the

Single-photon time-of-flight measurements for benchmarking time transfer in quantum networks

November 14, 2025
Author(s)
Dongxing He, Paulina Kuo, YaShian Li-Baboud, Anouar Rahmouni, Matthew Shaw, Boris Korzh, Thomas Gerrits
We propose a single-photon time-of-flight (ToF) measurement method to benchmark fiber-path delay estimation in optical two-way time and frequency transfer (OTWTFT) protocols. The single-photon ToF measurement yields uncertainties better than 2 ps (0.5 mm

Hyperspectral photon-counting optical time domain reflectometry

October 4, 2022
Author(s)
Anouar Rahmouni, Samprity Saha, Oliver T. Slattery, Thomas Gerrits
Optical time-domain reflectometry (OTDR) is one of the most used techniques for nondestructive characterization of optical fiber links. Although conventional OTDR exhibits good performance in classical network applications, photoncounting OTDR (ν-OTDR)

Laser Spectroscopy of the y7PJo states of Cr I

March 16, 2022
Author(s)
Eric Norrgard, Daniel Barker, Stephen Eckel, Sergey Porsev, Charles Cheung, Mikhail Kozlov, Ilya Tupitsyn, Marianna Safronova
… decay rates of the 3d$^4$($^5$D)4s4p($^3$P$^\rmo}}$)\ y$^7$P$^\rmo}}_2,3,4}$ states of Cr I. The decay rates are …

Characterization of a Josephson Junction Comb Generator

October 13, 2020
Author(s)
Akim Babenko, Alirio De Jesus Soares Boaventura, Nathan Flowers-Jacobs, Justus Brevik, Anna Fox, Dylan Williams, Zoya Popovic, Paul Dresselhaus, Samuel P. Benz
We present a new type of microwave frequency combs with a potentially calculable pulse shape. The device is an array of 1500 Josephson junctions (JJs) connected in series along a transmission line. The pulse generation is based on the nonlinearity of the

L-Edge Spectroscopy of Dilute, Radiation-Sensitive Systems Using a Transition-Edge-Sensor Array

December 7, 2017
Author(s)
Daniel S. Swetz, William B. Doriese, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, Kelsey M. Morgan, Galen C. O'Neil, Joel N. Ullom
We present X-ray absorption spectroscopy and resonant inelastic X-ray scattering (RIXS) measurements on the iron L-edge of 0.5 mM aqueous ferricyanide. These measurements demonstrate the ability of high-throughput transition- edge-sensor (TES)

New measurement of the Boltzmann constant k by acoustic thermometry of helium-4 gas

September 11, 2017
Author(s)
Laurent Pitre, Fernando Sparasci, Michael R. Moldover, Cecile Guianvarch, Catherine Martin, Martin Himbert, Mark Plimmer, James B. Mehl, Giuliano Albo, Bo Gao, Lara Risegari
The SI unit of temperature will soon be redefined in terms of a fixed value of the Boltzmann constant k derived from an ensemble of measurements worldwide. We report on a new determination of k using acoustic thermometry of helium-4 gas in a 3-litre quasi

Correlations for the Viscosity and Thermal Conductivity of Ethyl Fluoride (R161)

May 17, 2017
Author(s)
Ch. M. Tsolakidou, Marc J. Assael, Marcia L. Huber, Richard A. Perkins
This paper presents new wide-ranging correlations for the viscosity and thermal conductivity of ethyl fluoride (R161) based on critically evaluated experimental data. The correlations are designed to be used with a recently published equation of state that

SRM 1967a: High-Purity Platinum Thermoelement

March 9, 2016
Author(s)
Karen M. Garrity, Weston L. Tew, Dean C. Ripple
… that SRM 1967a differs from SRM 1967 by less than 0.7 µV throughout its temperature range. The thermoelectric … response to within 0.25 µV up to 250 °C and rising to 0.7 µV at 1700 °C, all at 95 % confidence. …

Nanostructures and Dynamics of Macromolecules Bound to Attractive Filler Surfaces

August 18, 2015
Author(s)
Naisheng Jiang, Maya K. Endoh, Tadanori Koga, Tomomi Masui, Hiroyuki Kishimoto, Michihiro Nagao, Sushil K. Satija, Takashi Taniguchi
We report in-situ structures and dynamics of polybutadiene (PB) chains bound to carbon black (CB) fillers (the so-called "bound polymer layer (BPL)") in a good solvent. The BPL on the CB fillers were extracted by solvent leaching of a CB-filled PB compound

Physical Properties of LiMn 2-x MxO 4 (M = Ni, Fe) Sol-Gel Nanopowders

December 15, 2014
Author(s)
E. Talik, L. Lipinska, A. Guzik, Pawel Zajdel, M. Michalska, M. Szubka, M. Kadziolka-Gawel, Rick L. Paul
The Pechini sol-gel method was applied to obtain LiMn 2-xT xO 4 (T=Ni, Fe; x = 0.1 to 0.5) nanopowders. Crystal and electronic structures, chemical composition and magnetic properties of the materials were characterized by X-ray diffraction, XPS, SEM/EDX
Displaying 476 - 500 of 1184
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