Results 41 to 50 of about 134,069 (317)

Coherent surface bremsstrahlung in low-energy-electron diffraction and reflection-high-energy-electron diffraction

Physical Review B, 1974
The classical theory of transition radiation generated when charged particles travel through a dielectric-vacuum interface is reconsidered in order to include the effects of the diffraction of the particle beam occurring at the surface. If the surface is atomically smooth, coherent Bragg reflection and transmission occur as well as specular reflection ...
A. A. Lucas, Davor Juretić, M. S. Tomas, Marijan Šunjić   +3 more
openaire   +3 more sources

β-Ga2O3 on Si (001) grown by plasma-assisted MBE with γ-Al2O3 (111) buffer layer: Structural characterization

AIP Advances, 2021
β-Ga2O3 was deposited in thin film form by plasma-assisted molecular beam epitaxy at 670 °C and 630 °C onto a γ-Al2O3 (111) buffer layer grown at 840 °C by e-beam evaporation on a clean Si (001) surface.
Tobias Hadamek, Agham B. Posadas, Fatima Al-Quaiti, David J. Smith, Martha R. McCartney, Alexander A. Demkov   +5 more
doaj   +1 more source

Growth and characterization of quaternary-alloy ferromagnetic semiconductor (In,Ga,Fe)Sb

AIP Advances, 2022
We study the growth and properties of the quaternary-alloy ferromagnetic semiconductor (In0.94−x,Gax,Fe0.06)Sb (x = 5%–30%; the Fe concentration is fixed at 6%) grown by low-temperature molecular beam epitaxy.
Tomoki Hotta, Kengo Takase, Kosuke Takiguchi, Karumuri Sriharsha, Le Duc Anh, Masaaki Tanaka   +5 more
doaj   +1 more source

Probing the size and density of silicon nanocrystals in nanocrystal memory device applications [PDF]

, 2005
Structural characterization via transmission electron microscopy and atomic force microscopy of arrays of small Si nanocrystals embedded in SiO2, important to many device applications, is usually difficult and fails to correctly resolve nanocrystal size ...
Atwater, Harry A., Dicken, Matthew, Feng, Tao, Heath, James R., Yu, Hongbin   +4 more
core   +1 more source

Structural and functional characterization of chitinase from carnivorous plant Drosera adelae

FEBS Open Bio, EarlyView.
A class I chitinase from the carnivorous plant Drosera adelae was expressed and purified using a yeast system, revealing high enzymatic activity. Structural analyses of the catalytic and chitin‐binding domains identified key tyrosine residues involved in substrate binding, offering insights into the enzyme's adaptation for insect digestion.
Kazunari Yoneda, Yuki Naruse, Yusaku Suizu, Tomohiro Araki, Yoshikazu Hoshi, Haruhiko Sakuraba, Junji Hayashi, Toshihisa Ohshima   +7 more
wiley   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Decelerated lattice excitation and absence of bulk phonon modes at surfaces: Ultra-fast electron diffraction from Bi(111) surface upon fs-laser excitation

Structural Dynamics, 2019
Ultrafast reflection high-energy electron diffraction is employed to follow the lattice excitation of a Bi(111) surface upon irradiation with a femtosecond laser pulse. The thermal motion of the atoms is analyzed through the Debye–Waller effect.
V. Tinnemann, C. Streubühr, B. Hafke, T. Witte, A. Kalus, A. Hanisch-Blicharski, M. Ligges, P. Zhou, D. von der Linde, U. Bovensiepen, M. Horn-von Hoegen   +10 more
doaj   +1 more source

In-situ Investigation of the Early Stage of TiO2 epitaxy on (001) SrTiO3 [PDF]

, 2011
We report on a systematic study of the growth of epitaxial TiO2 films deposited by pulsed laser deposition on Ti-terminated (001) SrTiO3 single crystals. By using in-situ reflection high energy electron diffraction, low energy electron diffraction, x-ray
Di Capua, R., Granozio, F. Miletto, Lampis, N., Radovic, M., Ristic, Z., Salluzzo, M., Vaglio, R.   +6 more
core   +2 more sources

A Different Perspective on the Solid Lubrication Performance of Black Phosphorous: Friend or Foe?

Advanced Engineering Materials, EarlyView.
Researchers investigate black phosphorous (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli, Manel Rodríguez Ripoll, Sabine Schwarz, Ali Erdemir, Maria Clelia Righi, Carsten Gachot   +5 more
wiley   +1 more source

Research Update: Stoichiometry controlled oxide thin film growth by pulsed laser deposition

APL Materials, 2015
The oxidation of species in the plasma plume during pulsed laser deposition controls both the stoichiometry as well as the growth kinetics of the deposited SrTiO3 thin films, instead of the commonly assumed mass distribution in the plasma plume and the ...
Rik Groenen, Jasper Smit, Kasper Orsel, Arturas Vailionis, Bert Bastiaens, Mark Huijben, Klaus Boller, Guus Rijnders, Gertjan Koster   +8 more
doaj   +1 more source