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.

Journals

Critical Size for Shape Transition and Size Evolution of Ge Islands on Si (100)

October 12, 2021

Author(s)

B Liu, C L. Berrie, J Bright, S R. Leone

Atomic force microscopy is used to study the molecular beam epitaxy of Ge on Si(100) at different growth temperatures and coverages. Forgrowth temperatures...

Tuning the Mean-Field Energy in a Fermi Gas of Atoms

October 12, 2021

Author(s)

C A. Regal, Deborah S. Jin

An exotic superfluid phase has been predicted for an ultracold gas of fermionic atoms. Experimenters have cooled these gases into the quantum degenerate regime...

Time-Resolved Measurements of the E-to-H Mode Transition in Electronegative Pulse-Modulated Inductively Coupled Plasmas

October 12, 2021

Author(s)

M Edamura, Eric C. Benck, Yicheng Wang

Time-resolved measurements of electronegative pulse-modulated inductively coupled plasmas (ICPs) were carried out using various measurement techniques. It was...

Pressure-Induced Optoelectronic Properties of InP Nanocrystals: Tight-Binding Approach

October 12, 2021

Author(s)

J G. Diaz, W Jaskolski, M Zielinski, Garnett W. Bryant

An empirical tight-binding theory is used to investigate pressure effects on the electronic and optical properties of InP nanocrystals. For bulk InP, our model...

Radiation From k-Shell Filling in Highly Charged Ions: A Driver for Resonant Combination Cancer Therapy?

October 12, 2021

Author(s)

A P. Kavanagh, John D. Gillaspy, D G. Hirst, M H. Mendenhall, N Nakamura, S Ohtani, H Wantanabe, F J. Currell

The possibility of using radiation from bare and hydrogen-like highly-charged ions as a driver for a proposed form of cancer therapy is discussed. This proposed...

The Role of Fluorine Chemistry in Anisotropic Etching of Dielectric Materials

October 12, 2021

Author(s)

B Ji, S A. Motika, P R. Badowski, S Dheandhanoo, C Timmons, D E. Hess, Eric C. Benck, Y Ye

Fluorine-containing compounds have for many years been utilized to etch dielectric materials such as silicon oxide. Maintaining the balance between the removal...

Barium Strontium Titaanate Thin Film Analysis

October 12, 2021

Author(s)

T Remmel, R Deslattes, S Fujimura, H Honma, H Kobayashi, H Kohno, S M. Owens, J Pedulla, M Schulberg

Barium Strontium Titanate (BST) is under consideration as a high dielectric constant material for a number of semiconductor applications. Because of its very...

Effects of Flow Field and Diffusion Layer Properties on Water Accumulation in a PEM Fuel Cell

October 12, 2021

Author(s)

Jon P. Owejan, T Trabold, D L. Jacobson, Muhammad D. Arif, S G. Kandlikar

Water is the main product of the electrochemical reaction in a proton exchange membrane (PEM) fuel cell. Where the water is produced over the active area of the...

Ionization Cross Sections by Electron Impact of Halogen Atoms, Diatomic Halogen and Hydrogen Halide Molecules

October 12, 2021

Author(s)

M A. Ali, Yong Sik Kim

The Binary-Encounter-Bethe (BEB) model has been applied to calculate electron impact ionization cross sections of Br, I, Br2, I2, HCl, HBr and HI. The BEB...

Low-Temperature Kinetics of the Reaction of the OH Radical With Hydrogen Peroxide

October 12, 2021

Author(s)

A B. Vakhtin, D C. McCabe, A R. Ravishankara, S R. Leone

The kinetics of the reaction of the OH radical with hydrogen peroxide. H 2O 2 are studied over a temperature range of 96-296 K. The low-temperature environment...

Dielectric Function of Wurtzite GaN and AIN Thin Films

October 12, 2021

Author(s)

L X. Benedict, Eric L. Shirley, T Wethkamp, K Wilmers, C Cobet, N Esser, W Richter, M Cardona

We present measurements and calculations of the dielectric function of wurtzite GaN and AIN. Spectroscopic ellipsometry was used to determine ε (omega) of thin...

Proton-Pumping Capabilities of the M-Fast and M-Slow Photocycles of Bacteriorhodopsin

October 12, 2021

Author(s)

R W. Hendler, John Kakareka, P D. Smith, T J. Pohida, Curtis W. Meuse

The parallel model for the bacteriorhodopsin (BR) photocycle at neutral pH and a temperature near 20 contains an M-fast cycle with steps BR >K >L >Mf >N >O >BR...

Universal Algorithm for Calculating Transport Cross Sections of Electrons With Energies From 50 eV to 30 keV

October 12, 2021

Author(s)

Aleksander Jablonski, Cedric J. Powell

We report an analytic expression for transport cross sections (TCSs) calculated from the Dirac-Hartree-Fock potential for 92 elements (H to U) and electron...

Materials Data in the Internet Era - A Workshop on the Future

October 12, 2021

Author(s)

C P. Sturrock, J R. Rumble

In May 1999, ASTM E49 and the National Institute of Standards and Technology hosted a workshop in which over 100 international experts on materials data...

Lead-free Solder Alloys: NEMI Recommendation

October 12, 2021

Author(s)

E -. Bradley, C A. Handwerker, J -. Sohn

There has been substantial discussion worldwide in the electronics assembly community regarding the ideal composition for the primary lead-free alloy for use as...

The Ideal Gas Thermodynamics of Diesel Fuel Ingredients. I. Naphthalene Derivatives and Their Radicals

October 12, 2021

Author(s)

H Curran, C M. Wu, N Marinov, W J. Pitz, C K. Westbrook

The molecular fundamentals of 21 Naphthalene derivatives were investigaged, calculated, and evaluated, and their ideal gas thermodynamic properties were...

Stability in Thin Film Multilayers and Microlaminates: The Role of Free Energy, Structure, and Orientation at Interfaces and Grain Boundaries

October 12, 2021

Author(s)

A C. Lewis, Daniel Josell, Timothy P. Weihs

In polycrystalline multilayer systems, the free energies of the interfaces and grain boundaries will determine the relative stability of each layer as well as...

In-situ Microstructural Analysis of Cement Paste During Freezing. Part II: Computer Modeling

October 12, 2021

Author(s)

G M. Moss, Edward Garboczi, Hamlin M. Jennings

A combination of a three-dimensional hydration model and finite element analysis is used to simulate the microstructural behavior of cement paste during...

Effects of Aspect Ratio of Multi-Walled Carbon Nanotube on Flammability Properties of Polymer Nanocomposites

October 12, 2021

Author(s)

Bani Cipiriano, Takashi Kashiwagi, Srinivasa R. Raghavan, Ying Yang, E A. Grulke, Kazuya Yamammoto, John R. Shields, Jack F. Douglas

The effects of the aspect ratio of multi-walled carbon nanotube (MWNT) on viscoelastic properties and flammability properties of PS/MWNT nanocomposites are...

Molecular Modeling of the Thermal Decomposition of Polymers

October 12, 2021

Author(s)

S I. Stoliarov, H Zhang, P R. Westmoreland, R Lyon, Marc R. Nyden

Applications presented in this work demonstrate the potential for using quantum mechanics and molecular simulations to determine the mechanisms and rates of the...

The Use of 1,2-Dimethyl-3-(Benzyl Ethyl Iso-Butyl Poss)Imidszolium Chloride as an Organic Modifier in Polymer Layered Silicate Nanocomposites--A Dual Nanocomposites Approach

October 12, 2021

Author(s)

D M. Fox, P H. Maupin, S Bellayer, M Murariu, Jeffrey W. Gilman, Hugh C. De Long

A Reactive Molecular Dynamics Model of Thermal Decomposition in Polymers: II. Polyisobutylene

October 12, 2021

Author(s)

S I. Stoliarov, R Lyon, Marc R. Nyden

This is the second manuscript in a series of publications continuing the development and application of a method for investigation of the thermal decomposition...

Synthesis and Characterization of Siloxy-Containing Imidazolium Ionic Liquids

October 12, 2021

Author(s)

Paul A. Wheeler, Jeffrey W. Gilman, L J. Mathias

A novel family of siloxy-containing imidazolium ionic liquids was synthesized and their thermal and decomposition properties studied. Three of the four...

Development and Interpretation of the Security Rating Index

October 12, 2021

Author(s)

Jonathan Sylvie, Stephen R. Thomas, Sang-Hoon Lee, Robert E. Chapman

This article is a follow-on publication to Addressing Security in the Early Stages of the Project Life Cycle. It details the development and interpretation of...

Spherical Harmonic-Based Random Fields for Aggregates Used in Concrete

October 12, 2021

Author(s)

Mircea Grigoriu, Edward Garboczi, C Kafali

Macromodel-Based Simulation of Progressive Collapse: Steel Frame Structures

October 12, 2021

Author(s)

K Khandelwal, Sherif El-Tawil, Sashi Kunnath, Fahim H. Sadek, Hai S. Lew

Transport Kinetics of Methanol in Hydroxyethyl Methacrylate Homopolymer and Its Copolymers

October 12, 2021

Author(s)

C-S Tsai, S H. Lee, Tinh Nguyen

The kinetics of methanol transport in 2-hydroxyethyl methacrylate (HEMA) homopolymer and 75/25 and 50/50 mole fraction HEMA/DHPMA (2,3-dihydroxypropyl...

Some Properties of Irregular 3-D Particles

October 12, 2021

Author(s)

Michael A. Taylor, Edward Garboczi, S T. Erdogan, D Fowler

This paper discusses some of the properties of irregular particles that are of interest to engineers, including volume, density, & surface area. Numerical and...

Three-Dimensional Shape Analysis of Coarse Aggregates: Methodology and Preliminary Results on Several Different Coarse Aggregates

October 12, 2021

Author(s)

S T. Erdogan, P N. Quiroga, D Fowler, H A. Saleh, Richard A. Livingston, Edward Garboczi, Peter M. Ketcham, John G. Hagedorn, Steven G. Satterfield

The shape of aggregates used in concrete is an important parameter that helps determine many concrete properties. The mathematical technique of spherical...

Impedance/Dielectric Spectroscopy of Electroceramics. Part 2: Grain Shape Effects and Local Properties of Polycrystalline Ceramics

October 12, 2021

Author(s)

N Kidner, Z J. Homrighaus, B J. Ingram, T Mason, Edward Garboczi

The reduction of grain size from the microcrystalline regime into the nanocrystalline regime is known to produce significant changes in the transport properties...

Was this page helpful?