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Search Publications

NIST Authors in Bold

Displaying 31151 - 31175 of 73697

Non-Brownian Microrheology of a Fluid Gel Interface

February 20, 2008
Author(s)
Erik K. Hobbie, Sheng Lin-Gibson, S K. Kumar
We use stroboscopic video microscopy to study the motion of a sheared fluid-gel interface. External mechanical noise plays a role analogous to temperature, but with a low-frequency breakdown of linear response consistent with an underlying instability. We

The Role of Phase Noise Research and Metrology

February 19, 2008
Author(s)
David A. Howe
The oscillating, or repeating, signal that is the basis for constructing all signals is a voltage that exactly follows simple periodic sine and cosine functions of time. The synthesis of such signals, using an oscillator coupled with a ¿frequency

Zero-field remote detection of NMR with a microfabricated atomic magnetometer

February 19, 2008
Author(s)
M Ledbetter, I Savukov, D Budker, V Shah, Svenja A. Knappe, John E. Kitching, D Michalak, S Xu, A Pines
We demonstrate remote detection of nuclear magnetic resonance (NMR) with a microfabricated atomic magnetometer and microfluidic channel integrated on a single device. Detection occurs at zero magnetic field, which allows operation of the magnetometer in

Defining Units in the Quantum SI

February 18, 2008
Author(s)
Peter J. Mohr
Possible changes to the International System of Units (SI) are being discussed, including a proposal to define the units by specifying the values of a set of fundamental constants. This note is meant to be an elementary guide to the algebra associated with

Contact Induced Crystallinity for High Performance Soluble Acene-Based TFTs

February 17, 2008
Author(s)
David J. Gundlach, James Royer, Behrang Hamadani, Lucile C. Teague, Andrew J. Moad, Oana Jurchescu, Oleg A. Kirillov, Lee J. Richter, James G. Kushmerick, Curt A. Richter, Sungkyu Park, Thomas Jackson, Sankar Subramanian, John E. Anthony
Organic electronics present a tremendous opportunity to significantly impact the functionality and pervasiveness of large-area electronics. However, the lack of low-temperature low-cost deposition and patterning techniques limits the potential for the

High throughput adhesion testing using a modified edge lift-off test

February 17, 2008
Author(s)
Jiong Liu, Martin Chiang, Michael J. Fasolka, Christopher Stafford
The strength of an adhesively bonded joint depends on a host of factors such as surface treatment, roughness, materials properties, cure conditions and environmental variables. Therefore testing of adhesion within this large parameter space can be very

JKR Adhesion Testing Between Biologically Relevant Surfaces

February 17, 2008
Author(s)
Adam J. Nolte, Heqing Huang, Christopher Stafford
In this work we report recent observations obtained using an adhesion testing device that utilizes the contact mechanics theory of Johnson, Kendall, and Roberts (JKR). Our goal is to develop a system capable of measuring adhesive forces between

Single cantilever peel test for analysis of adhesion strength in nanotransfer printing

February 17, 2008
Author(s)
Deuk Y. Lee, Gottlieb Oehrlein, Daniel R. Hines, Jiong Liu, Jun Y. Chung, Christopher Stafford, Christopher Soles, Eric K. Lin
Nanotransfer printing (NTP) has attracted much attention as a method for fabricating nanoscale structures using materials that are not generally compatible with conventional lithographic techniques. For NTP of a polymer film to a polymer substrate, thermal

Large sensitive-area NbN nanowire superconducting single-photon detectors fabricated on single-crystal MgO substrates

February 15, 2008
Author(s)
Shigehito Miki, Mikio Fujiwara, Masahide Sasaki, Burm Baek, Aaron Miller, Robert Hadfield, Sae Woo Nam, Zhen Wang
We report on the performance of large area NbN nanowire superconducting single-photon detectors (SSPDs). 20 x 20 υm 2 area SSPDs with 80 and 100 nm linewidths and 50% fill factor were fabricated in 4-nm-thick NbN films grown on single-crystal MgO

Preparation of Nanoparticles by Continuous-Flow Microfluidics

February 15, 2008
Author(s)
Andreas Jahn, Joseph E. Reiner, Wyatt N. Vreeland, Don DeVoe, Laurie E. Locascio, Michael Gaitan
We review a variety of micro- and nanoparticle formulations produced with microfluidic methods. A diverse variety of approaches to generate micro-scale and nano-scale particles have been reported. Here we emphasize the use of microfluidics, specifically

Veneer Versus Core Failure in Adhesively Bonded All-Ceramic Crown Layers

February 14, 2008
Author(s)
James J. Lee, Jae-Young Kwon, Sanjit Bhowmick, Isabel K. Lloyd
Joining a brittle veneer to a strong ceramic core with an adhesive offers benefits over current fabrication methods for all-ceramic crowns. However, such joining introduces the possibility of subsurface radial cracking in the veneer as well as in the core

High Sensitivity FTIR-ATR Study of Ultra-Thin Zr02 Films: A Study of Phase Change

February 12, 2008
Author(s)
Safak Sayan, Deane Chandler-Horowitz, Nhan Van Nguyen, James R. Ehrstein, Mark Croft
Fourier Transform Infrared spectroscopy (FTIR) using the Attenuated Total Reflection (ATR) method was performed in the mid-IR spectral region on ultrathin ZrO2 films deposited on silicon wafers. A vibrational mode near 710 cm-1 was observed that undergoes

Lack of charge offset drift is a robust property of Si single electron transistors

February 12, 2008
Author(s)
Emmanouel S. Hourdakis, J A. Wahl, Neil M. Zimmerman
Single electron transistors (SETs) face several challenges before they can be considered technologically useful devices. One of them is the random, low frequency, charge offset drift that inhibits their use in parallel. Recently, tunable barrier Si SETs
Displaying 31151 - 31175 of 73697
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