U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 5426 - 5450 of 73917

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 film samples in the energy range from 3 eV to 9.8 eV. Calculations of ε (omega) for the bulk

Displacive Phase Transition in SrTiO 3 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 Zschack
Polarization dependent x-ray absorption fine structure measurements performed at the Ti K edge together with x-ray diffraction have been used to study the local structure in SrTiO3 thin films grown epitaxially on Si(001). SrTiO3 layers on Si(001) are found

Dopant Location Identification in Nd 3+ -Doped TiO 2 Nanoparticles

October 12, 2021
Author(s)
W Li, A I. Frenkel, Joseph Woicik, C Ni, S I. Shah
Doping large bandgap semiconductors is typically done in order to enhance photocatalytic, photovoltaic and other chemical and optoelectronic properties. The identification of dopant position and its local environment is essential to exploring the doping

Effects of Argon Gas-Cluster Ion Beam Processing on Surface Roughness, Crystalline Orientation Texture, Magnetic, and Giant Magnetoresistance Properties of A-Fe 2 O 3 Bottom Spin-Valves

October 12, 2021
Author(s)
S Bae, J H. Judy, P J. Chen, L Gan, William F. Egelhoff Jr., J Hautala
The effects of gas-cluster ion beam (GCIB) processing on the surface roughness, crystalline orientation texture, magnetic, and giant magneto resistance (GMR) properties of exchange biased anti-ferromagnetic (AF) oxide α-Fe 2O 3 bottom spin-vales (BSV) have

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 studied with two different MWNTs having average aspect ratios of 49 and 150. While no significant

Effects of Bond Coat Surface-Roughness on Residual Stresses of Thermal Barrier Coating Systems

October 12, 2021
Author(s)
C H. Hsueh, J Haynes, M Lance, P Becher, M Ferber, Stephen A. Langer, W Carter, W R. Cannon, Lin-Sien H. Lum
The adherence of plasma-sprayed thermal barrier coatings (TBCs) is dependent on mechanical interlocking at the interface between the ceramic top coat and the underlying metallic bond coat. A rough bond coat surface is required in order to establish

Effects of Solution pH and Surface Chemistry on the Post-Deposition Growth of Chemical Bath Deposited PbSe Nanocrystalline Films

October 12, 2021
Author(s)
Shaibai K. Sarkar, Shifi Kababya, Shimon Vega, Hagal Cohen, Joseph Woicik, A I. Frenkel, Gary Hodes
Chemical bath deposited PbSe films were subjected to post-deposition treatment with aqueous (typically 0.25 - 0.5 M) KOH. For films deposited using a citrate complex, this treatment resulted in dissolution of surface lead oxides (seen from XPS and EXAFS

Efficient Computation of Optical Forces With the Coupled Dipole Method

October 12, 2021
Author(s)
P C. Chaumet, Adel Rahmani, A Sentenac, Garnett W. Bryant
We present computational techniques to compute in an efficient way optical forces on arbitrary nanoobjects using the coupled dipole method. We show how the time of computation can be reduced by several orders of magnitude with the help of fast-Fourier

Elastic Modulus Measurements in Plasma Sprayed Deposits

October 12, 2021
Author(s)
Jay S. Wallace, J Ilavsky
A technique has been developed to characterize the elastic modulus of zirconium oxide-8% yttrium oxide plasma sprayed deposits. A commercial hardness indenter has been modified to record load-displacement as a spherical ball is elastically loaded onto the

Electro-optically derived millimeter-wave sources with phase and amplitude control

October 12, 2021
Author(s)
Bryan Bosworth, Nick Jungwirth, Kassi Smith, Jerome Cheron, Franklyn Quinlan, Ari Feldman, Dylan Williams, Nate Orloff, Chris Long
Integrated circuits are building blocks in millimeter-wave handsets and base stations, requiring nonlinear characterization to optimize performance and energy efficiency. Today's sources use digital-to-analog converters to synthesize arbitrary electrical

Electron Backscatter Diffraction Investigation of a Nano-Crystalline Pt Thin Film

October 12, 2021
Author(s)
T Maitland, X Han, Mark D. Vaudin, G R. Fox, M Coy
A polycrystalline Pt thin film deposited on a cut Si single crystal wafer coated with SiO2 and a TiO2 adhesion layer was studied using automated electron backscatter diffraction (EBSD). Integration of the EBSD detector and a scanning electron microscope

Electron Impact Total Ionization Cross Sections of CF 4 , C 2 F^6^ and C 3 F^8^

October 12, 2021
Author(s)
H Nishimura, W M. Huo, Yong Sik Kim, M A. Ali
Both theoretical and experimental electron-impact total ionization cross sections of CF 4, C 2F 6 and C 3F 8 are presented. The experimental cross sections have been measured as a function of incident electron energy T from threshold to 3 keV. A parallel
Displaying 5426 - 5450 of 73917
Was this page helpful?