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Search Publications

NIST Authors in Bold

Displaying 3851 - 3875 of 73697

Transport Properties of Few-Layer NbSe2: from Electronic Structure to Thermoelectric Properties

July 20, 2022
Author(s)
Tianhui Zhu, Peter Litwin, Md Golam Rosul, Devin Jessup, Md Sabbir Akhanda, Farjana Tonni, Sergiy Krylyuk, Albert Davydov, Petra Reinke, Stephen McDonnell, Mona Zebarjadi
4-layer NbSe2 is grown on SiO2 by molecular beam epitaxy. The in-situ X-ray photoelectron spectroscopy (XPS) measurements suggest a Nb-rich stoichiometry (Nb1+xSe2) likely due to intercalation of Nb atoms in between the NbSe2 layers. The metallic nature of

Development and Application of an Indoor Carbon Dioxide Metric

July 19, 2022
Author(s)
Andrew K. Persily
Indoor carbon dioxide (CO2) concentrations have been considered for decades in evaluating indoor air quality (IAQ) and ventilation, and more recently in discussions of the risk of airborne infectious disease transmission. However, many of these

Electrostatic Repulsion Slows Relaxations of Polyelectrolytes in Semidilute Solutions

July 19, 2022
Author(s)
Ali Slim, Winnie Shi, Farshad S. Samghabadi, Antonio Faraone, Amanda Marciel, Ryan Poling-Skutvik, Jacinta Conrad
We investigate the structure and dynamics of unentangled semidilute solutions of sodium polystyrene sulfonate (NaPSS) using small-angle neutron scattering (SANS) and neutron spin-echo (NSE) spectroscopy. The effects of electrostatic interactions and chain

Magnetic-field sensitive charge density wave orders in the superconducting phase of UTe2

July 19, 2022
Author(s)
Anuva Aishwarya, Julian May-Mann, Arjun Raghavan, Laimei Nie, Marisa Romanelli, Sheng Ran, Shanta Saha, Johnpierre Paglione, Nicholas Butch, Eduardo Fradkin, Vidya Madhavan
The intense interest in triplet superconductivity partly stems from theoretical predictions of exotic excitations such as non-abelian Majorana modes, chiral supercurrents, and half-quantum vortices. However, fundamentally new, and unexpected states may

Quantum materials for energy-efficient neuromorphic computing: Opportunities and challenges

July 19, 2022
Author(s)
Axel Hoffmann, Shriram Ramanathan, Julie Grollier, Andrew Kent, Marcelo Rozenberg, Ivan Schuller, Oleg Shpyrko, Robert Dynes, Yeshaiahu Fainman, Alex Frano, Eric Fullerton, Giulia Galli, Vitaliy Lomakin, Shyue Ping Ong, Amanda K. Petford-Long, Jonathan A. Schuller, Mark Stiles, Yayoi Takamura, Yimei Zhu
Neuromorphic computing approaches become increasingly important as we address future needs for efficiently processing massive amounts of data. The unique attributes of quantum materials can help address these needs by enabling new energy-efficient device

Rapid Phase Transition of Al2O3 Encapsulated MoTe2 via Thermal Annealing

July 19, 2022
Author(s)
Rohan Sengupta, Saroj Dangi, Sergiy Krylyuk, Albert Davydov, Spyridon Pavlidis
MoTe2 has gained a lot of attention recently as a potential phase change material candidate for low-power nonvolatile switches and high-density memory applications, due to the smallest predicted energy offset between its semiconducting 2H and semimetallic

Tensile Tests at 77 K and 4 K on 316L Stainless Steel Welded Plates

July 19, 2022
Author(s)
Dash Weeks, Nicholas Derimow, Jake Benzing
Based on the collaborative framework established between ASME, NASA, and NIST, quasi-static tensile tests were performed in liquid nitrogen (77 K) and liquid helium (4 K) on tensile specimens extracted from the centers of four welded 316L stainless steel

Topological Surface State Annihilation and Creation in SnTe/Crx(BiSb)2-xTe3 Heterostructures

July 19, 2022
Author(s)
Peng Deng, Alexander Grutter, Yulei Han, Megan E. Holtz, Peng Zhang, Patrick Quarterman, Shuaihang Pan, Shifei Qi, Zhenhua Qiao, Kang L. Wang
Topological surface states are a new class of electronic states with novel properties, including the potential for annihilation between surface states from two topological insulators at a common interface. Here, we report the annihilation and creation of

Forensic Iris: A Review, 2022

July 18, 2022
Author(s)
James Matey, George W. Quinn, Patrick Grother
John Daugman correctly summarized the state of forensic iris recognition circa 2006 for the book Forensic Human Identification: an Introduction [1]: Iris recognition has limited forensic value, because (unlike fingerprints or DNA, for example) (1) iris

Implementation of a Binary Neural Network on a Passive Array of Magnetic Tunnel Junctions

July 18, 2022
Author(s)
Jonathan Goodwill, Nitin Prasad, Brian Hoskins, Matthew Daniels, Advait Madhavan, Lei Wan, Tiffany Santos, Michael Tran, Jordan Katine, Patrick Braganca, Mark Stiles, Jabez J. McClelland
The increasing scale of neural networks and their growing application space have produced a demand for more energy and memory efficient artificial-intelligence-specific hardware. Avenues to mitigate the main issue, the von Neumann bottleneck, include in

Knowledge Mining in Cybersecurity: From Attack to Defense

July 18, 2022
Author(s)
Khandakar Ashrafi Akbar, Sadaf MD Halim, Yibo Hu, Anoop Singhal, Latifur Khan, Bhavani Thuraisingham
In the fast-evolving world of Cybersecurity, an analyst often has the difficult task of responding to new threats and attack campaigns within a limited amount of time. If an analyst fails to do so, this can lead to severe consequences for the system under

Magnetic Uncertainties for Compact Kibble Balances: An Investigation

July 18, 2022
Author(s)
Shisong Li, Stephan Schlamminger
The Kibble balance has become one of the major instruments for realizing the mass unit, the kilogram, in the revised international system of units (SI). Researchers at about a dozen national metrology institutes are actively working with Kibble balances

Chemically Induced Magnetic Dead Shells in Superparamagnetic Ni Nanoparticles Deduced from Polarized Small-Angle Neutron Scattering

July 17, 2022
Author(s)
Bhaskar Das, Joseph Batley, Kathryn L. Krycka, Julie A. Borchers, Patrick Quarterman, Caroline Korostynski, My Nguyen, Ishita Kamboj, Eray Aydil, Chris Leighton
Advances in synthesis and characterization of colloidal magnetic nanoparticles (NPs) have yielded great gains in the understanding of their complex magnetic behavior, with implications for numerous applications. Recent work using Ni NPs as a model soft

Polymorphic variant Asp239Tyr of human DNA glycosylase NTHL1 is inactive for removal of a variety of oxidatively-induced DNA base lesions from genomic DNA

July 16, 2022
Author(s)
Melis Kant, Victoria Quintana, Erdem Coskun, Pawel Jaruga, R. Stephen Lloyd, Joann Sweasy, Miral M. Dizdar
Base excision repair is the major pathway for the repair of oxidatively-induced DNA damage with DNA glycosylases removing modified DNA bases in the first step. Among them, human NTHL1 is specific for excision of several pyrimidine- and purine-derived

3D Imaging from Passive Scattered Light using Plenoptic Information

July 15, 2022
Author(s)
James Leger, Connor Hashemi, Jarvis Haupt, Di Lin, Tianqi Luo, Abhinav Sambasivan, Takahiro Sasaki, Joseph Talgader, Gary Meyer, Michael Tetzlaff, Erich N. Grossman
We use plenoptic measurements of visible, infrared, and THz radiation to locate and image objects that are hidden from direct view by detecting their passive radiation scattered from rough surfaces.

Comparison of two multiplexed portable cold atom vacuum standards

July 15, 2022
Author(s)
Lucas Ehinger, Bishnu Acharya, Daniel Barker, James A. Fedchak, Julia Scherschligt, Eite Tiesinga, Stephen Eckel
We compare the vacuum measured by two portable cold atom vacuum standards (pCAVS) based on ultracold $^7$Li atoms. Our pCAVS devices share the same laser system and measure the vacuum concurrently. The two pCAVS together detected a leak with a rate on the

Gate resistance thermometry: An electrical thermal characterization technique

July 15, 2022
Author(s)
Georges Pavlidis, Brian Foley, Samuel Graham
Gate Resistance Thermometry (GRT) is a potential reliable technique to determine the average temperature of the gate metal in GaN transistors. In contrast to other electrical techniques that average the temperature across different areas of the active
Displaying 3851 - 3875 of 73697
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