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 2801 - 2825 of 2915

Emerging Metrology for High Throughput Nanomaterial Genotoxicology

August 26, 2016
Author(s)
Bryant C. Nelson, Christa W. Wright, Yuko Ibuki, Maria Moreno-Villanueva, Hanna L. Karlsson, Giel Hendriks, Christopher M. Sims, Neenu Singh, Shareen H. Doak
The rapid development of the engineered nanomaterial (ENM) manufacturing industry has accelerated the incorporation of ENMs into a wide variety of consumer products across the globe. Unintentionally or not, some of these ENMs may be introduced into the

Photochemical transformations of thiolated polyethylene glycol coatings on gold nanoparticles

August 16, 2016
Author(s)
Stacey M. Louie, Justin M. Gorham, Eric A. McGivney, Jingyu Liu, Kelvin B. Gregory, Vincent A. Hackley
Photochemical reactions can result in significant transformations of manufactured nanomaterials in sunlit environments. While transformations of inorganic nanoparticles (NPs) have been investigated extensively, much less attention has been focused on the

Synchrotron 4-dimensional imaging of two-phase flow through porous media

July 13, 2016
Author(s)
Felix H. Kim, D. Penumadu, P. Patel, X. Xiao, E. J. Garboczi, Shawn P. Moylan, M A. Donmez
Near real-time visualization of complex two-phase flow in a porous medium was demonstrated with dynamic 4D (3D + time) imaging at the 2-BM beam line of the Advanced Photon Source (APS) at Argonne National Laboratory. Advancing fluid fronts through tortuous

GC/MS Measurement of Nanomaterial Induced Genotoxicity in Isolated DNA

November 24, 2015
Author(s)
Bryant C. Nelson, Elijah J. Petersen, Pawel Jaruga, M Miral Dizdar
Making accurate measurements of the environmental fate and environmental and biological effects of engineered nanomaterials (ENMs) is critical for reliable risk assessment of these materials. ENM induced oxidative stress and/or direct binding of ENMs to

Bubble Nucleation of Highly Superheated Water on Thin Film Platinum Films supported by SiN Membranes using a Low-Noise Bridge Circuit

December 1, 2014
Author(s)
Eric J. Ching, Michael J. Carrier, C. T. Avedisian, James R. Young, Bruce R. Land, Richard E. Cavicchi
This study describes the use of stress-minimized thin film platinum (Pt) membrane configurations (200 nm thick, 150 μm long, 10 μm wide) for promoting bubble nucleation of water near its superheat limit. The membrane designs consist of Pt films deposited

Characterization of Buried Structure in Directed Self Assembly Block Copolymers

July 30, 2014
Author(s)
Daniel F. Sunday, Matthew R. Hammond, Chengqing C. Wang, Wen-Li Wu, Dean M. DeLongchamp, Regis J. Kline, Melia Tjio, Joy Cheng, Jed W. Pitera
The directed self assembly (DSA) of block copolymers (BCP) can multiply or subdivide the pitch of a lithographically defined chemical or topological pattern and is a resolution enhancement candidate to augment conventional lithography for patterning sub-20

Identification and Quantification of Human DNA Repair Protein NEIL1 by Liquid Chromatography/Isotope-Dilution Tandem Mass Spectrometry

December 26, 2012
Author(s)
M Miral Dizdar, Pawel Jaruga, Guldal Kirkali, Bryant C. Nelson, Gamze Tuna, Prasad T. Reddy
Accumulated evidence points to DNA repair capacity as an important factor in cancer and other diseases. DNA repair proteins are promising drug targets and are emerging as prognostic and therapeutic biomarkers. Thus, the knowledge of the overexpression or

Near-field Calibration of an Objective Spectrophotometer to NIST Radiometric Standards for the Creation and Maintenance of Standard Stars for Ground- and Space-Based Applications

September 13, 2012
Author(s)
John T. Woodward IV, Keith R. Lykke, Claire E. Cramer, John T. McGraw, Peter Zimmer, Daniel C. Zirzow, Susana Deustua, Dean Hines
NIST-calibrated detectors will be used by the ground-based 100mm diameter Astronomical Extinction Spectrophotometer (AESoP) to calibrate the spectral energy distributions of bright stars to sub-1% per 1nm spectral resolution element accuracy. AESoP will

Effect of Diamond Nanolubricant on R134a Pool Boiling Heat Transfer

May 21, 2012
Author(s)
Mark A. Kedzierski
This paper quantifies the influence of diamond nanoparticles on the boiling performance of R134a/polyolester mixtures on a roughened, horizontal, flat surface. Nanofluids are liquids that contain dispersed nano-size particles. A lubricant based nanofluid

Methodology for Formulating Diesel Surrogate Fuels with Accurate Compositional, Ignition-Quality, and Volatility Characteristics

May 14, 2012
Author(s)
Charles J. Mueller, William J. Cannella, Thomas J. Bruno, Bruce Bunting, Heather Dettman, James A. Franz, Marcia L. Huber, Mani Natarajan, William J. Pitz, Matthew A. Ratcliff, Ken Wright
In this work a novel approach is developed to formulate surrogate fuels having characteristics that are representative of diesel fuels produced from real-world refinery streams. Because diesel fuels consist of hundreds of compounds, it is difficult to

Ground-based observatory operations optimized and enhanced by direct atmospheric measurements

July 22, 2010
Author(s)
John T. McGraw, Peter C. Zimmer, Azzam Mansour, Dean C. Hines, Anthony B. Hull, Lisa Rossmann, Daniel C. Zirzow, Steven W. Brown, Gerald T. Fraser, Keith R. Lykke, Allan W. Smith, John T. Woodward IV, Christopher W. Stubbs
Earth's atmosphere represents a turbulent, turbid refractive element for every ground-based telescope. We describe the significantly enhanced and optimized operation of observatories supported by the combination of a lidar and spectrophotometer that allows

Concrete nanoscience and nanotechnology: Definitions and applications

February 10, 2010
Author(s)
Edward Garboczi
There are many improvements needed in concrete, especially for use in renewal and expansion of the world's infrastructure, e.g. increased durability, decreased brittleness and increased tensile strength, and use of non-traditional materials like fly ash

Electrically-stimulated gradients in water and counterion concentrations within electroactive polymer actuators

February 1, 2010
Author(s)
Jong Keun Park, Paul J. Jones, Chris Sahagun, Kirt A. Page, Daniel S. Hussey, David L. Jacobson, Sarah E. Morgan, Robert B. Moore
While ionic polymer metal composites (IPMCs) have been studied for more than 10 years, the specific actuation mechanism is still unclear. In this work, neutron imaging, applied potential (AP) and current sensing (CS) atomic force microscopy (AFM) methods

Available states and available space: Static properties that predict dynamics of confined fluids

April 8, 2009
Author(s)
Vincent K. Shen, Gaurav Goel, William P. Krekelberg, Mark J. Pond, Jeetain Mittal, Jeffrey R. Errington, Thomas M. Truskett
Although classical density functional theory provides reliable predictions for the static properties of simple equilibrium fluids under confinement, a theory of comparative accuracy for the transport coefficients has yet to emerge. Nonetheless, there is

Supplemental backward equations T(pkh), v(p,h), and T(p,s), v(p,s) for the critical and supercritical regions (region 3) of the industrial formulation

January 7, 2009
Author(s)
H J. Kretzschmar, J R. Cooper, A Dittmann, Daniel G. Friend, J S. Gallagher, Allan H. Harvey, K Knobloch, Radim Mares, Kiyoshi Miyagawa, N Okita, I. Stocker, Wolfgang Wagner, I Weber
In modeling steam power cycles, thermodynamic properties as functions of the variables ( ), p h or ( ), p s are required in the critical and supercritical regions (region 3 of IAPWSIF97). It is difficult to perform these calculations with IAPWS-IF97
Displaying 2801 - 2825 of 2915
Was this page helpful?