Results 21 to 30 of about 313,538 (273)

(La0.97RE0.01Yb0.02)2O2S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er)

open access: yesNanoscale Research Letters, 2017
Phase-pure (La0.97RE0.01Yb0.02)2O2S upconversion (UC) nanophosphors (average crystallite size ~ 45 nm; RE=Ho, Er) were annealed from their hydrothermally crystallized layered hydroxyl sulfate precursors in flowing hydrogen at 1200 °C for 1 h, with water ...
Ji-Guang Li   +5 more
doaj   +1 more source

Burning question: Are there sustainable strategies to prevent microbial metal corrosion?

open access: yesMicrobial Biotechnology, 2023
The global economic burden of microbial corrosion of metals is enormous. Microbial corrosion of iron‐containing metals is most extensive under anaerobic conditions.
Di Wang   +3 more
doaj   +1 more source

Thermal Oxidation Preparation of Doped Hematite Thin Films for Photoelectrochemical Water Splitting

open access: yesInternational Journal of Photoenergy, 2014
Sn- or Ge-doped hematite thin films were fabricated by annealing alloyed films for the purpose of photoelectrochemical (PEC) water splitting. The alloyed films were deposited on FTO glass by magnetron sputtering and their compositions were controlled by ...
Song Li   +4 more
doaj   +1 more source

Effect of in-situ synthesized TiB2 on microstructure and mechanical property of Al/TiB2-SiC interpenetrating phase composites

open access: yesJournal of Asian Ceramic Societies, 2022
Al/TiB2-SiC composites were prepared based on TiB2-SiC porous ceramic preforms. The advantages of this work were characterized by the in-situ synthesized TiB2 in porous ceramic preforms which directly formed interconnected pores as well as TiB2-SiC ...
Xin Zhang, Xin-Yan Yue, Hong-Qiang Ru
doaj   +1 more source

Anisotropy of Molecules [PDF]

open access: yesNature, 1922
DIRECT evidence that the molecules of gases are not spherically symmetrical and are anisotropic in their properties is furnished by the recent experiments of Lord Rayleigh, who has shown that the light scattered by molecules is, in general, not completely polarised when observed in a direction transverse to the pencil of light traversing the gas.
openaire   +1 more source

Random-anisotropy-axis magnet with infinite anisotropy

open access: yesPhysical Review B, 1987
We have studied the random-axis magnet with infinite anisotropy by three methods: Cayley-tree approximation, Migdal-Kadanoff renormalization group (MKRG), and Imry-Ma scaling. In the Cayley-tree approximation, by an examination of susceptibilities, it is shown that there exists a competition between the coordination number z and the number of ...
Harris, A. Brooks   +2 more
openaire   +4 more sources

Simple Fabrication of Superhydrophobic Nickel Surface on Steel Substrate via Electrodeposition

open access: yesInternational Journal of Electrochemical Science, 2017
Preparation of artificial superhydrophobic surfaces are in urgent demand in a specific domain. In the study, we obtained superhydrophobic nickel surface on steel substrates via electrodeposition nickel process and stearic acid modification, which are ...
Junyang Tan   +3 more
doaj   +1 more source

Development of novel lightweight and cost-effective Mg–Ce–Al wrought alloy with high strength

open access: yesMaterials Research Letters, 2021
The low microalloying content and high yield strength of 365 MPa have been achieved simultaneously in extruded Mg–Ce–Al alloy which is mainly ascribed to the unexpected grain refinement (mean size of ∼420 nm).
Hucheng Pan   +6 more
doaj   +1 more source

Charge-Transfer Process in Surface-Enhanced Raman Scattering Based on Energy Level Locations of Rare-Earth Nd3+-Doped TiO2 Nanoparticles

open access: yesNanomaterials, 2021
Surface-enhanced Raman scattering (SERS) for semiconductor nanomaterial systems is limited due to weak Raman signal intensity and unclear charge-transfer (CT) processes for chemical enhancement.
Zihao Zhao   +3 more
doaj   +1 more source

Complex anisotropy beneath the Peruvian flat slab from frequency-dependent, multiple-phase shear wave splitting analysis [PDF]

open access: yes, 2013
Flat or shallow subduction is a relatively widespread global occurrence, but the dynamics remain poorly understood. In particular, the interaction between flat slabs and the surrounding mantle flow has yet to be studied in detail.
Long, Maureen D., Eakin, Caroline M.
core   +1 more source

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