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Search Publications

NIST Authors in Bold

Displaying 5151 - 5175 of 73697

Challenges for Sub-PicoTesla Magnetic-Tunnel-Junction Sensors

October 12, 2021
Author(s)
Robert McMichael, Philip Pong, John Unguris, William F. Egelhoff Jr., A Edelstein, E Nowak, Sean R. Parkin
The extension of small, inexpensive, low-power magnetic sensors into the sub-picoTesla regime, which is currently dominated by fluxgates and SQUIDS, would be a paradigm shift for the field of magnetic sensors. The necessary elements for sub-picoTesla MTJ

Challenging Some Free - Energy Reduction Criteria for Grain Growth

October 12, 2021
Author(s)
S G. Srinivasan, John W. Cahn
Laboratory experiments on wedge shaped bicrystalline specimens ahve provided much insight into grain-boundary migration [for example: Rath and Hu, Trans. AIME, VOl. 245, pp. 1577 (1969)]. We revisit this geometry, but employ a wedge angle of 2 pi, at the

Change Detection between XML Documents

October 12, 2021
Author(s)
K H. Lee, Y C. Choy, S B. Cho, Xiao Tang, V R. Mccrary
¿¿¿This paper presents an efficient algorithm to detect changes between old and new versions of an XML document. The difference between the two versions can be considered to be an edit script that transforms one document tree into another. The proposed

Characterization of Chemical Processes in Humid Air and Humid Air/Toluene Plasmas

October 12, 2021
Author(s)
David S. Green, J T. Herron, T J. Buckley, L W. Sieck
This paper describes a laboratory-validated database of ion-neutral molecule reactions in humid air and humid air/toluene plasmas. Pulsed electron-bean high-pressure mass spectrometry was used to investigate the sequential cationic chemistry in gas streams

Characterization of Elastomeric Blends by Atomic Force Microscopy

October 12, 2021
Author(s)
P Achalla, Jennifer L. McCormick, T Hodge, C Moreland, P Esnault, Alamgir Karim, H Raghavan
The bulk mechanical properties of a blend of elastomers are found to depend on the micro and nano scale morphology of the phases of the materials in the blend. In this paper, we examine the phase morphology of blends of incompatible elastomers using Atomic

Characterization of New 5M and 7M Polytypes of Niobia-Doped Ca 2 Ta 2 O 7

October 12, 2021
Author(s)
I E. Grey, Robert S. Roth, W G. Mumme, J Planes, Leonid A. Bendersky, C Li, J Chenavas
Two new calcium tantalate polytypes have been prepared in the system Ca2Ta2O7-Ca2Nb2O7. Their structures have been determined and refined using single crystal X-ray diffraction data and powder neutron diffraction data, and their dielectric properties have

Chemical Analysis of HfO 2 / Si (100) Film Systems Exposed to NH 3 Thermal Processing

October 12, 2021
Author(s)
Patrick S. Lysaght, Joseph Woicik, Daniel A. Fischer, Gennadi Bersuker, Joel Barnett, Brendan Foran, Hsing-Huang Tseng, Raj Jammy
Nitrogen incorporation in HfO2/SiO2 films utilized as high-k gate dielectric layers in advanced metal-oxide field-effect transistors (MOSFETs) has been investigated. Thin HfO2 blanket films deposited by atomic layer deposition on either SiO2 or NH3 treated

Chemically Amplified Photoresists Fundamental Properties and Limits of Applicability to Sub-100 nm Lithography

October 12, 2021
Author(s)
D M. Goldfarb, Eric K. Lin, Christopher Soles, B C. Trinque, S D. Burns, Ronald L. Jones, Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, M Angelopoulos, C G. Wilson, Sushil K. Satija, Wen-Li Wu
State-of-the-art lithographic technologies combine chemically amplified photoresists and sophisticated radiation sources to delineate patterned areas with high spatial resolution, enabling the fabrication of continually decreasing feature sizes in the

Clinical Implications and Utility of Field Cancerization

October 12, 2021
Author(s)
Gabriel D. Dakubo, J P. Jakupciak, Rajiv Dhir, M A. Birch-Machin, Ryan L. Parr
Cancer begins with multiple cumulative epigenetic and genetic alterations that sequencially transform a cell or a group of cells in a particular organ. The early genetic events might lead to clonal expansion of preneoplastic daughter cells in a particular

CO(v) Produced From CH 3 or CD 3 + O

October 12, 2021
Author(s)
T P. Marcy, R R. Diaz, Dwayne E. Heard, S R. Leone, L B. Harding, S J. Klippenstein
Combined experimental and theoretical investigations of the title reactions are presented. Time-resolved Fourier transform infrared (FTIR) emission studies of CO(v=1) produced from the CH 3 + O and CD 3 + O reactions show that there is approximately a one

Coating Kinetics of Fluoropolymer Process Aids for Sharkskin Elimination: The Role of Domain Size

October 12, 2021
Author(s)
D Bigio, Mathurin G. Meillon, S B. Kharchenko, David C. Morgan, Hui Zhou, S Oriani, C Macosko, Kalman D. Migler
We study the ability of fluoropolymer based polymer processing aids (PPA) to eliminate surface melt fracture (sharkskin) during extrusion of polyethylene in relation to blend morphology (PPA droplet size) and processing conditions (shear rate). Under the

Coherent Raman Spectra of the v 1 Mode of 10 BF 3 and 11 BF 3

October 12, 2021
Author(s)
Robynne Kirkpatrick, Tony Masiello, Alfons Weber, J Nibler
High resolution (0.001cm-1) coherent anti-Stokes Raman spectroscopy (CARS) was used to directly examine the n1 symmetric stretching mode of the planar symmetric D3h molecules 10BF3 and 11BF3. Simulations of the spectra were done using n1 rovibrational

Colloquium: Femtosecond Optical Frequency Combs

October 12, 2021
Author(s)
S T. Cundiff, Jun Ye
Recently there has been a remarkable synergy between the technology of precision laser stabilization and modelocked ultrafast lasers. This has resulted in control of the frequency spectrum produced by modelocked lasers, which consists of a regular comb of

Combined Effect of Coherent Z Exchange and the Hyperfine Interaction in Atomic PNC

October 12, 2021
Author(s)
W R. Johnson, M S. Safronova, U I. Safronova
The nuclear spin-dependent parity nonconserving (PNC) interaction arising from a combination of the hyperfine interaction and the coherent, spin-independent, PNC interaction from Z exchange is evaluated using many-body perturbation theory. For the 6s^1/2^

Comment on Phys. Rev. Lett. 95, 017201 (2005)

October 12, 2021
Author(s)
J A. Bland, S J. Steinmuller, T Trypiniotis, William F. Egelhoff Jr.
In their article High Temperature Ferromagnetism in GaAs-Based Heterostructures with Mn ? Doping , the authors A. M. Nazmul et al. report finding remarkably high Curie temperatures in Mn delta doped GaAs structures. They base their assessment on the

Comment on Stability of Small Carbon-Nitride Heterofullerenes

October 12, 2021
Author(s)
G Sun, Rui-Hua Xie, M C. Niklaus
In a recent Letter [1], Schultz et, al, proposed the existence of heterofullerenes C n-xN x (40 less then or equal to} n less then or equal to} 50) based on the pattern of the peaks in the mass spectrum of carbon-nitride nanostructures produced by the arc

Comparative Dielectric Behavior of PBFe 1/2 Ta 1/2 O 3 and NaNbO 3 :Gd Relaxor-Like Crystals

October 12, 2021
Author(s)
I P. Raevski, S A. Prosandeev, U Waghmare, V V. Eremkin, V G. Smotrakov, V A. Shuvaeva
Experimental data obtained for PBFe 1/2Ta 1/20 3 (PFT) and NaNbO 3:Gd (NaNbGd) single crystals show a diffused dielectric permittivity peak that is inherent to relaxor ferroelectrics. However some deviations from the normal relaxor properties were also
Displaying 5151 - 5175 of 73697
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