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Displaying 3551 - 3575 of 74178

Large Negative Poisson's Ratio for SrTiO3 Thin Films Grown on Si(001

October 12, 2021
Author(s)
F S. Aguirre-Tostado, A Herrera-Gomez, Joseph Woicik, R Droopad, Z Yu, D G. Schlom, E Karapetrova, P Pianetta, C S. Hellberg
The driving force of the semiconductor industry to integrate thin transition-metal oxides with Si transistor technology has led to the development of SrTiO3 thin-film growth on Si(001). As SrTiO3 represents a large class of oxides with the perovskite

Laser Based Angle-Resolved Photoemission, the Sudden Approximation and Quasiparticle-Like Spectral Peaks in Bi 2 Sr 2 Cu 2 O 8 +D

October 12, 2021
Author(s)
j D. Koralek, Jack F. Douglas, N C. Plumb, Z Sun, A V. Fedorov, M M. Murnane, H C. Kapteyn, Steven T. Cundiff, Y Aiura, K Oka, H. Eisaki, D S. Dessau
A new low photon energy regime of angle-resolved photoemission spectroscopy is accessed with lasers and used to study the hight T c superconductor Bid2^CaCu 2O 8d+^delta. The low energy increases bulk sensitivity, reduces background, and improves

Layer Perfection in Ultrathin, MOVPE-Grown InAs Layers Buried in GaAs(001) Studied by X-Ray Standing Wave and Photoluminescence Spectroscopy

October 12, 2021
Author(s)
J A. Gupta, Joseph Woicik, S P. Watkins, D A. Harrison, E D. Crozier, B A. Karlin
Using the In-L fluorescence produced by normal-incidence X-ray standing waves, we have measured the layer perfection and positions for ML = 1 and 1/2 (where ML = # of mono layers) InAs quantum wells buried in GaAs(001). Growth temperature effects were

Layered Double Hydroxides as Cation Exchange Materials

October 12, 2021
Author(s)
Paul Braterman, Nandika A. D'Souza, Jeffrey W. Gilman, Mickey C. Richardson, Laxmi K. Sahu, Mauro Zammarano
Layered double hydroxides (LDH) are a class of materials formally related to brucite-like hydroxides by the incorporation of higher valent cations, such as Al(III). The layer charge is neutralized by the insertion of any of a large range of exchangeable

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 a replacement for eutectic Sn-Pb in electronics assembly. Over the last two years, a consensus

Learning to Recognize Distributional Functions

October 12, 2021
Author(s)
J E. Devaney, L Hunter, James J. Filliben
This paper introduces a novel methodology that enables recognition of distributional functions without doing a fit of the data to the distribution. This methodology combines the technique of equation signatures, which uses coefficient independent

Lessons From Ultraviolet Monitoring Spectroradiometer Intercomparisons

October 12, 2021
Author(s)
E A. Thompson, E A. Early
A series of three interagency solar ultraviolet monitoring spectroradiometer intercomparisons were conducted at Table Mountain outside Boulder, Colorado. The primary purpose of these intercomparisons was to compare the solar ultraviolet irradiances

Local Structure and Dynamics Studied by Force Modulation Spectroscopy and Imaging

October 12, 2021
Author(s)
William J. Price, P K. Kuo, T R. Lee, Z C. Ying, Gang-Yu Liu
Using nanoengineered structures of self-assembled monolayers on gold, asystematic investigation was conducted to study the sensitivity of force modulation AFM to molecular level packing, domain boundaries, and chemical functionality. Tip-surface contact

Long-Term Environmental Fatigue of Pultruded Glass-Fiber-Reinforced Composites

October 12, 2021
Author(s)
Kate Liao, Carl R. Schultesiz, Donald L. Hunston
Pultruded glass-fiber-reinforced vinyl ester composite coupons were subjected to four-point-bend fatigue in various environments to study long-term durability for infrastructure applications. Several groups of specimens were aged in water or in water

Low Dielectric Constant Nanocomposite Thin Films Based on Silica Nanoparticle and Organic Thermosets

October 12, 2021
Author(s)
Q Lin, Stephen Cohen, Lynne Gignac, Brian Herbst, David Klaus, Eva Simonyi, Jeffrey Hedrick, John Warlaumont, Hae-Jeong Lee, Wen-Li Wu
Low dielectric constant (low-k) nanocomposite thin films have been prepared by spin coating and thermal cure of solution mixtures of two organic low-k thermoset pre-polymers and a silica nanoparticle with an average diameter of about 8nm. The electrical

Low Temperature Compaction of Nanosize Powders

October 12, 2021
Author(s)
E J. Gonzalez, Gasper J. Piermarini
In recent years there has been a strong interest in the processing of nanosize ceramic powders because of the potential of sintering them at low temperatures and also because ceramic pieces made of nanosize gram structures may exhibit superior mechanical

Low-energy electron collisions with sodium: Scattering of spin-polarized electrons

October 12, 2021
Author(s)
H L. Zhou, B L. Whitten, W K. Trail, M A. Morrison, K B. MacAdam, K Bartschat, D W. Norcross
The electron-sodium system is an excellent prototype of non-relativistic electron scattering from a quasi-one-electron atomic target, and is tractable both experimentally and theoretically. Recently, this system has been studied in a series of

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 is provided by a pulsed Laval nozzle supersonic expansion of nitrogen with admixed H 2O 2

Magnetic depth profiling Co/Cu multilayers to investigate magnetoresistance

October 12, 2021
Author(s)
John Unguris, D. Tulchinsky, Michael H. Kelley, Julie Borchers, Joseph Dura, Charles Majkrzak, S. Y. Hsu, R. Loloee, W. P. Pratt, J. Bass
The magnetic microstructure responsible for the metastable high resistance state of weakly coupled, as-prepared [Co(6nm)/Cu(6nm)] 20 multilayers was analyzed using polarized neutron reflectivity and scanning electron microscopy with polarization analysis

Magnetoelectric Nanocomposite Thin Films Designed by Composition Spreads

October 12, 2021
Author(s)
Makoto Murakami, C Gao, K S. Chang, B Hu, M A. Aronova, C L. Lin, Jason Hattrick-Simpers, S E. Lofland, L Knauss, Leonid A. Bendersky, M. Wuttig, Ichiro Takeuchi
Multiferroic materials Superscript (1,2) can exhibit magnetoelectric (ME) effects Superscript (3-5), which are of great interest for novel device applications including inexpensive ultrasensitive magnetometer approaching the sensitivity of SQUID

MALDI TOF MS Analysis of Chan End Functonalized Polymers

October 12, 2021
Author(s)
Kathleen M. Flynn, Barry J. Bauer, Kathryn Beers, S Bencherif, H M. Byrd, Sheng Lin-Gibson
Recently, we and other research laboratories have developed methods whereby an organic species is covalently attached to the polymer forming an organic salt to analyze by matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI

Manganese-Enhanced Magnetic Resonance Microscopy of Mineralization

October 12, 2021
Author(s)
I Chesnick, T Todorov, J M. Centeno, Dale Newbury, John A. Small, K Potter
Paramagnetic manganese (II) can be employed as a calcium surrogate to enhance the sensitivity of the magnetic resonance microscopy (MRM) technique to the processing of calcium during the bone formation process. At high doses, osteoblasts can take up

Manufacture of Al/SiC Metal Matrix Composites by the Press and Sinter Route

October 12, 2021
Author(s)
G T. Campbell, R Raman, Richard J. Fields
Aluminum based Metal Matrix Composites (MMC's) are being considered for many different high volume applications. The most common manufacturing rout for aluminum based MMC's is a blend/can/extrude route. This route is considered high cost and not

Manufacture of Extremely Flat 300 mm Silicon Wafers

October 12, 2021
Author(s)
Marc Tricard, Paul Dumas, Christopher Hall, Ulf Griesmann, Quandou (. Wang
The flatness requirement for silicon wafers at the exposure site will be lower than 50 nm by 2010 and may be as low as 25nm by 2015 (TRS 2005). This creates new challenges for both wafer polishing and metrology tools capable of meeting the specifications
Displaying 3551 - 3575 of 74178