U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 1501 - 1525 of 4634

Relativity and Optical Clocks

September 24, 2010
Author(s)
Chin-Wen Chou, David Hume, Till P. Rosenband, David J. Wineland
… aluminum ion, geodesy, geoid, gravitational red shift, optical … standards, quality factor, time dilation, trapped ion frequency standards …

Morphology Dependence of Ultrafast Emission From Metal-Dendrimer Nanocomposites

October 12, 2021
Author(s)
O Varnavski, T Goodson, F Groehn, Barry J. Bauer, Eric J. Amis
… the results of ultra-fast fluorescence investigations from gold-dendrimer nanocomposites of different morphologies. … and characterized for Polyamidoamine (PAMAM) G5-based gold colloids, which possess a complex architecture. This is … to the result for G9 PAMAM dendrimers in which one gold nanoparticle of near spherical shape is formed in one …

Temperature-Controlled Depth Profiling in Poly (methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS) II. An Investigation of Sputter-Induced Topography, Chemical Damage and Depolymerization Effects

February 1, 2007
Author(s)
Christine M. Mahoney, Albert J. Fahey, John G. Gillen, Chang Xu, James Batteas
… Secondary Ion Mass Spectrometry (SIMS) employing an SF polyatomic primary ion source was used to depth profile Poly(methyl … rates, damage cross sections, and overall secondary ion stability) were monitored as a function of temperature. … Poly (methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS) II. An Investigation of …

Surface Enhanced Raman Spectroscopy in a Microfluidic Device

February 1, 2004
Author(s)
D Dunmire, D B. Romero, Guangjun Cheng, Angela R. Hight Walker
… the solution phase vibrational structure of molecules on gold and silver colloids. Gold and silver colloids show large enhancement factors … volumes are achieved while using a small sample size. Gold and silver colloids are prepared in situ in the device …

Fatigue Flaw NDE Reference Standard Development - Phase I Feasibility Study

November 1, 2012
Author(s)
Mark D. Richards, Joseph D. McColskey, Dash Weeks
A feasibility study was performed to evaluate a novel method of accurately fatigue cracking steel plates to generate fatigue proposed fatigue crack reference standards. Fatigue cracks were introduced into low carbon steel reference plates in which the

Development of a Robust Early-Stage Thermal Runaway Detection Model for Lithium-ion Batteries

October 22, 2024
Author(s)
Wai Cheong Tam, Jian Chen, Wei Tang, Qi Tong, Hongqiang Fang, Anthony Putorti
… model for early-stage thermal runaway of a lithium-ion battery utilizing acoustics and a deep learning paradigm. A series of single-cell lithium-ion battery tests is conducted. Different state-of-charge … Early-Stage Thermal Runaway Detection Model for Lithium-ion Batteries …

Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) for High-Throughput Characterization of Biosurfaces

January 1, 2003
Author(s)
S V. Roberson, A Sehgal, Albert J. Fahey, Alamgir Karim
… film. In this preliminary work, we tracked the secondary ion intensities of various species along the 45 mm length of … film. We noticed consistent trends, with the secondary ion signals for oxidized species steadily increasing with the … Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) for High-Throughput …

Ionic Hydrogen bond Networks and Ion Solvation 1. An Efficient Monte Carlo / Quantum Mechanical Method for Structural Search and Energy Computation: Ammonium / Water

February 25, 2009
Author(s)
Yi-Lei Zhao, Michael Mautner, Carlos A. Gonzalez
… we compute the stepwise hydration energy of the ammonium ion in NH4 +(H2O)n clusters (n = 1-8), for which experimental … this work should be useful for simulating relatively large ion/solvent systems. … Ionic Hydrogen bond Networks and Ion Solvation 1. An Efficient Monte Carlo / Quantum …

An Electrically Substituted Bolometer as a Transfer Standard Detector

July 1, 2000
Author(s)
Joseph P. Rice
… in the infrared spectral region where silicon photodiode trap-detectors cannot be used and where the noise of … similar to other liquid-helium-cooled bolometers, uses a gold-black absorber film and silicon temperature sensor on a … substrate. The novel aspect of the ESB is that the gold-black optical absorber film is also used as an …

Parallel multi-parameter study of PEI-functionalized gold nanoparticle synthesis for bio-medical applications: Part 1. A critical assessment of methodology, properties and stability

August 20, 2019
Author(s)
Tae Joon Cho, Justin M. Gorham, John M. Pettibone, Jingyu Liu, Jiaojie Tan, Vincent A. Hackley
… Cationic polyethyleneimine (PEI) conjugated gold nanoparticles (AuNPs) that are chemically and physically … Parallel multi-parameter study of PEI-functionalized gold nanoparticle synthesis for bio-medical applications: …
Displaying 1501 - 1525 of 4634
Was this page helpful?