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Displaying 3726 - 3750 of 74137

Surface Treatment of Mercury Free Alloys

October 12, 2021
Author(s)
S B. Geiger, D Gurbatov, M P. Dariel, F Eichmiller, R Liberman, M Ratzker
Finishing and polishing methods were examined for two metallic direct restorative materials being proposed as possible alternatives to amalgam, namely a gallium alloy and a consolidated silver alloy. The polished surfaces were compared to a conventional

Synchrotron Based Surface Science to Probe Polymeric Interfacial Regions

October 12, 2021
Author(s)
Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, Daniel A. Fischer
Synchrotron based X-ray absorption spectroscopy was utilized to probe the chemistry and structure of polymers in interfacial regions, including the interfacial regions, including the interfacial composition of filled epoxy composites, and the surface

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 compounds exhibited an unexpectedly low decomposition temperature of ca. 200 C that appears to be due to

Synthesis of Imidazolium Salts and Their Application in Epoxy Montmorillonite Nanocomposites

October 12, 2021
Author(s)
Joseph Langat, S Bellayer, P Hudrlik, A Hudrlik, P H. Maupin, Jeffrey W. Gilman, D T. Raghavan
Considerable research has been conducted in improving the performance characteristics of nanocomposites, however, relatively few attempts have been made to address the thermal stability of nanocomposite. An attempt is being made to improve the thermal

Synthesis, structure, electronic and thermal properties of sphalerite CuZn2InS4

October 12, 2021
Author(s)
Oluwagbemiga P. Ojo, Wilarachchige D. C. B. Gunatilleke, Hagen Poddig, Hsin Wang, Joshua B. Martin, Dylan J. Kirsch, George S. Nolas
Quaternary chalcogenides continue to be of interest due to the variety of physical properties they possess, as well as their potential for different applications of interest. Investigations on materials with the sphalerite crystal structure have only

Systematic Study of Cancellation of Errors in the Benzene Dimer Interaction Energy

October 12, 2021
Author(s)
Ines Gonzalez, Stephen L. Garrison, M Marquez, Carlos A. Gonzalez, E C. Lim
We present a broadly applicable method or diagnostic for the appropriateness of the counterpoise correction and illustrate its value via calculations on the benzene dimer. The results also explain the fortuitous cancellation of errors that led to good

Tailoring the High-K Gate Dielectric/Sillicon Interface for CMOS Applications

October 12, 2021
Author(s)
Y S. Lin, R Puthenkovilakam, J P. Chang, C P. Bouldin, Igor Levin, Nhan Van Nguyen, Y Sun, P Pianetta, T Conard, W Vandervorst, V Venturo, S Selbrede
The interfacial properties, thermal stabilities, and the electrical characteristics of ZrO 2/ Si and ZrO 2/SiO 2/Si were investigated and the interfacial layer of as-deposited ZrO 2 on silicon is likely to be ZrSi xO y. The ZrO 2/ZrSi xO y/Si is

Temperature Effects on Surface Pattern Formation in Thin Block Copolymer Films

October 12, 2021
Author(s)
A P. Smith, Jack F. Douglas, Eric J. Amis, Alamgir Karim
Hole formation on the surface of thin films of symmetric diblock copolymers is investigated as a function of time, t, temperature, T, and film thickness, h. The size of the holes approaches a steady state value at long times and their long-time size is

The 3-0 Quadrupole Band in H2 by Cavity Ring-Down Spectroscopy

October 12, 2021
Author(s)
D C. Robie, Joseph T. Hodges
Several lines in the S and Q branches (including the previously unobserved Q32 and Q33 lines) of the 3-0 quadrupole band of H2 have been detected by cavity ring-down spectroscopy using a multimode laser with a long cavity. The noise equivalent absorption

The Crystal Chemistry of L-Ta 2 O 5 and Related Structures

October 12, 2021
Author(s)
I E. Grey, W G. Mumme, Robert S. Roth
Single crystals of a new form of L-Ta2O5 with a 19 x b superstructure have been synthesised by flux growth. The phase has C-centred monoclinic symmetry with a = 6.199(1) , b = 69.55(1) (= 19 x 3.66 ), c = 3.880 (1) . The structure was refined in space

The Effect of Finger Positioning on the Generation of Propulsive Force

October 12, 2021
Author(s)
S McDonald, J E. Faller
Freestyle swimming competition is extremely fierce, as the winner of a 50- or 100- meter sprint often beats the second place swimmer by amargin of less than one hundredth of a second. So every stroke counts, especially with regard to the swimmer's

The Effect of Interfacial Free Energies on the Stability of Microlaminates

October 12, 2021
Author(s)
A C. Lewis, A B. Mann, D V. Heerden, Daniel Josell, Timothy P. Weihs
Laminated composites with polycrystalline layers typically break down at high temperatures through grain boundary grooving and the pinch-off of individual layers. Such materials, when exposed to high temperatures, develop grooves where grain boundaries

The Effect of Ultrasonic Vibration of Posts on Root Surface Temperature

October 12, 2021
Author(s)
Andrew Huttula, Patricia Tordik, Glen Imamura, F Eichmiller, Scott McClanahan
This study measured root surface temperature changes when ultrasonic vibration, with and without irrigation, was applied to cemented endodontic posts. Twenty-six, extracted, single-rooted premolars were randomly divided into 2 groups. Root lengths were

The Effects of Water on the Fatigue Behavior for Pultruded Glass-Reinforced Composite

October 12, 2021
Author(s)
Kate Liao, Carl R. Schultesiz, Donald L. Hunston, L C. Brinson
Pultruded composites are finding increasing use in infrastructure and marine applications where they see prolonged exposure to environmental factors such as moisture. This work examines the fatigue behavior (4 point bending) in air and water for pultruded

The Goddard High Resolution Spectrograph: In-Orbit Performance

October 12, 2021
Author(s)
S R. Heap, J L. Linsky
The in-orbit performance of the Goddard High Resolution Spectrograph onboard the Hubble Space Telescope (HST) is presented. This report covers the pre-COSTAR period, when instrument performance was limited by the effects of spherical aberration of the
Displaying 3726 - 3750 of 74137