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Search Publications

NIST Authors in Bold

Displaying 13301 - 13325 of 73697

Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition

July 21, 2017
Author(s)
Hujun Cao, Jianping Guo, Fei Chang, Claudio Pistidda, Wei Zhou, Xilun Zhang, Antonio Santoru, Hui Wu, Norbert Schell, Rainer Niewa, Ping Chen, Thomas Klassen, Martin Dornheim
A new complex ternary amide Rb 2[Mn(NHd2) 4], which simultaneously contains both transition and alkali metal catalytic sites, is developed. This is in line with the recently reported TM-LiH composite catalysts, which has been shown to effectively break the

Ultrahigh and Selective SO 2 Uptake in Inorganic Anion-Pillared Hybrid Porous Materials

July 21, 2017
Author(s)
Xili Cui, Qiwei Yang, Lifeng Yang, Rajamani Krishna, Zhiguo Zhang, Zongbi Bao, Hui Wu, Zongbi Ren, Wei Zhou, Banglin Chen, Huabin Xing
The efficient capture of SO 2 is of great significance in gas purification processes including the flue gas desulfurization (FGD) and natural gas purification, but the design of porous materials with high adsorption capacity and selectivity of SO 2 remains

Analysis, Comparison, and Assessment of Latent Fingerprint Preprocessing

July 20, 2017
Author(s)
Haiying Guan, Paul Y. Lee, Curtis L. Lamp, Andrew Dienstfrey, Mary Frances Theofanos, Brian Stanton, Matthew Schwarz
Latent fingerprints obtained from crime scenes are rarely immediately suitable for identification purposes. Instead, most latent fingerprint images must be preprocessed to enhance the fingerprint information held within the digital image, while suppressing

Autonomous Relocation Strategies for Cells on Wheels in Public Safety Networks

July 20, 2017
Author(s)
Kamran Sayrafian, Ladan Rabieekenari
Lack of network availability or limited access to communication services are among the challenges that public safety officials and first responders could face during disasters or emergency scenarios. Networking infrastructure can partially (or sometimes

Open-path dual-comb spectroscopy to an airborne retroreflector

July 20, 2017
Author(s)
Kevin C. Cossel, Eleanor M. Waxman, Fabrizio R. Giorgetta, Michael A. Cermak, Dan Hesselius, Shalom Ruben, William C. Swann, Gregory B. Rieker, Nathan R. Newbury
We demonstrate a new technique for spatial mapping of multiple atmospheric gas species. This system is based on high-precision dual-comb spectroscopy to a retroreflector mounted on a flying multicopter. We measure the atmospheric absorption over long open

Smart Sensors and Standard-based Interoperability in Smart Grids

July 20, 2017
Author(s)
Yuyin Song, Gerald J. FitzPatrick, Kang B. Lee
Smart grids (SGs) are electrical power grids that apply information, advanced networking, and real-time monitoring and control technologies to lower costs, save energy, and improve security, interoperability, and reliability. Smart sensors (SSs) can

Strain engineering a 4a*?3a charge-density-wave phase in transition-metal dichalcogenide 1T-VSe2

July 19, 2017
Author(s)
Duming Zhang, Jeonghoon Ha, Hongwoo H. Baek, Yang-Hao Chan, Donat F. Natterer, Alline Myers, Joshua D. Schumacher, William Cullen, Albert Davydov, Young Kuk, Mei-Yin Chou, Nikolai Zhitenev, Joseph A. Stroscio
We report a new charge density wave (CDW) structure in strained 1T-VSe2 thin films synthesized by molecular beam epitaxy. The CDW structure is unconventional and exhibits a rectangular 4a×√3a periodicity, as opposed to the previously reported hexagonal 4a

An improved electronic measurement of the Boltzmann constant by Johnson noise thermometry

July 18, 2017
Author(s)
Jifeng Qu, Samuel Benz, Kevin Coakley, Horst Rogalla, Weston L. Tew, David R. White, Kunli Zhou, Zhenyu Zhou
Recent measurements using acoustic gas thermometry have determined the value of the Boltzmann constant, k, with a relative uncertainty less than 110-6. These results have been supported by a measurement with a relative uncertainty of 1.910-6 made with

Nanolayer Analysis by Neutron Reflectometry

July 18, 2017
Author(s)
Joseph A. Dura, Eric Daniel Rus, Paul Kienzle, Brian B. Maranville
Neutron reflectometry offers unique benefits for nanolayer research in green chemistry by providing accurate depth profiles of thin films and interfaces with sub-nanometer precision under in operando condition of active material in their native

Evidence of Molecular Hydrogen Trapped in Two-Dimensional Layered Titanium Carbide-Based MXene

July 17, 2017
Author(s)
Naresh C. Osti, Michael Naguib, Madhu Sudan Tyagi, Yury Gogotsi, Alexander I. Kolesnikov, Eugene Mamontov
The presence of molecular hydrogen at ambient conditions in a MXene (Ti 3C 2T x)) material is revealed by inelastic and elastic neutron scattering. Inelastic neutron scattering spectrum measured at 5 K shows a peak at 14.6 meV, providing a clear indication

Genome-wide reconstruction of complex structural variants using read clouds

July 17, 2017
Author(s)
Noah Spies, Ziming Weng, Alex Bishara, Jennifer H. McDaniel, David N. Catoe, Justin M. Zook, Marc L. Salit, Robert B. West, Serafim Batzoglou, Arend Sidow
Recently developed methods that utilize partitioning of long genomic DNA fragments, and barcoding of shorter fragments derived from them, have succeeded in retaining long-range information in short sequencing reads. These so-called read cloud approaches

Neutronics and Safety Studies on a Research Reactor Concept for Advanced Neutron Sources

July 17, 2017
Author(s)
Zeyun NMN Wu, Robert E. Williams, J. Michael Rowe, Thomas Henderson Newton, Sean O'Kelly
This paper presents the neutronics and thermal-hydraulics safety analysis results for an LEU-fueled research reactor concept being designed and studied at NIST. The main goal of the research reactor is to provide advanced neutron sources for scientific

Origin of Long Lifetime of Band-Edge Charge Carriers in organic-Inorganic Lead Iodide Perovskites

July 17, 2017
Author(s)
Tianran Chen, Wei-Liang Chen, Benjamin J. Foley, Jooseop Lee, Jacob P. C. Ruff, J. Y. Peter Ko, Craig Brown, Leland Harriger, Depei Zhang, Changwon Park, Mina Yoon, Yu-Ming Chang, Joshua J. Choi, Seung-Hun Lee
Long carrier lifetime is what makes hybrid organic-inorganic perovskites (HOIPs) high performance photovoltaic materials. The microscopic mechanism behind the unusually long carrier lifetime of greater than equal to} 1 υs is not well understood. Here we

An HL7 v2 Platform for Standards Development and Testing

July 16, 2017
Author(s)
Sandra I. Martinez, Robert D. Snelick
Development of healthcare data exchange standards has long been problematic, plagued with ambiguous and inconsistent requirement specifications. This situation leads to potential misinterpretation by implementers, thus limiting the effectiveness of the

Atom-based RF electric field metrology above 100 GHz

July 16, 2017
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon
While atom-based radio-frequency (RF) electric field probes have the potential to improve electric field measurements for a broad range of frequencies (from a few GHz to 100s of GHz) and field strengths (mV/m to kV/m), extending the measurement
Displaying 13301 - 13325 of 73697
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