Results 21 to 30 of about 5,825 (220)

Computational study of boron nitride nanotube synthesis: how catalyst morphology stabilizes the boron nitride bond [PDF]

open access: yes, 2009
In an attempt to understand why catalytic methods for the growth of boron nitride nanotubes work much worse than for their carbon counterparts, we use first-principles calculations to study the energetics of elemental reactions forming N2, B2 and BN ...
A. S. Foster   +4 more
core   +3 more sources

Investigation of work function and chemical composition of thin films of borides and nitrides [PDF]

open access: yes, 2018
Thin films of various borides, nitrides, and barium fluorides were tentatively deposited by pulsed laser deposition and by magnetron sputtering in order to develop the components of thermionic-photovoltaic devices for the high-temperature thermal to ...
Allen   +23 more
core   +1 more source

Luminescent Donor‐Acceptor Radical With Propeller Chirality: Bright and Photostable Red Circularly Polarized Luminescence and Whispering Gallery Mode Resonance

open access: yesAngewandte Chemie, EarlyView.
A series of donor‐attached brominated chiral luminescent radicals (CzTTBrM, 2CzTTBrM, and 3CzTTBrM) was synthesized, showing red to near‐infrared (NIR) circularly polarized luminescence (CPL) with exceptionally high PLQY of up to 76% and markedly enhanced CPL brightness (BCPL). Doping into polystyrene microspheres further yields whispering gallery mode
Kazuhiro Nakamura   +14 more
wiley   +2 more sources

Effect of Antagonistic Binder–Catalyst Interactions on Catalytic Activity in Lithium–Sulfur Batteries

open access: yesAngewandte Chemie, EarlyView.
The binder is shown to interact antagonistically with the catalyst in a sulfur cathode, impeding Li2Sx adsorption onto catalytic active sites. This hinders electrochemical performance and prevents the effective deployment of catalysts. This study showcases catalyst‐binder compatibility as a key parameter for cathode design in lithium‐sulfur (Li‐S ...
Kameron Liao   +2 more
wiley   +2 more sources

Influence of Laser Beam Power on the Temperature Distribution and Dimensions of the Molten-Pool Formed during Laser Boriding of Nimonic 80A-Alloy

open access: yesCrystals, 2023
Laser boriding is a surface treatment that involves the simultaneous re-melting and mixing of the alloying material, containing amorphous boron blended with diluted polyvinyl alcohol, with the substrate material (Nimonic 80A-alloy).
Natalia Makuch, Piotr Dziarski
doaj   +1 more source

INVESTIGATION OF WEAR BEHAVIOR OF BORONIZED AISI 316 STAINLESS STEEL

open access: yesNiğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, 2019
   In this study, the wear behavior of boronized AISI 316 stainless steel was investigated. The chemical analysis of the sample to be used in the experiment was carried out with optical emission spectrometry before starting the boronizing experiment ...
Polat Topuz, Tuna Aydoğmuş
doaj   +1 more source

Kinetic investigation of AISI 304 Stainless Steel boronized in indirect heated fluidized bed furnace [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2016
In this study, kinetic examinations on boronized AISI 304 Stainless Steel samples were described. Samples were boronized in indirect heated fluidized bed furnace consists of Ekabor 1™ boronizing agent at 1123, 1223 and 1323 K for 1,2 and 4 hours.
Topuz P., Çiçek B., Akar O.
doaj   +1 more source

Dynamic Phase Diagram of Catalytic Surface of Hexagonal Boron Nitride under Conditions of Oxidative Dehydrogenation of Propane. [PDF]

open access: yes, 2018
Partially oxidized surfaces of hexagonal boron nitride (hBN) and several metal borides are unexpectedly excellent catalysts for oxidative dehydrogenation of alkanes to olefins, but the nature of the active site(s) on these B-containing interfaces remains
Alexandrova, Anastassia N   +3 more
core   +2 more sources

Formation of copper boride on Cu(111)

open access: yesFundamental Research, 2021
Boron forms compounds with nearly all metals, with notable exception of copper and other group IB and IIB elements. Here, we report an unexpected discovery of ordered copper boride grown epitaxially on Cu(111) under ultrahigh vacuum.
Chengguang Yue   +11 more
doaj   +1 more source

Angle-resolved photoemission spectroscopy of Co-based boride superconductor LaCo1.73Fe0.27B2

open access: yes, 2012
We have performed angle-resolved photoemission spectroscopy of Co-based boride superconductor LaCo1.73Fe0.27B2 (Tc = 4.1 K), which is isostructural to the 122-type Fe-pnictide superconductor with the pnictogen atom being replaced with boron.
Hosono, H.   +8 more
core   +1 more source

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