Results 41 to 50 of about 21,776 (269)

A new generation, promising engineering material: Cubic boron nitride c-BN

Hittite Journal of Science and Engineering, 2015
In order to meet the design requirements and expanding demands in various engineering fields, it is essential to incorporate new technological improvements in material sciences into existing processes and applications.
Baris Cetin, Goksel Durkaya, Hakan Kaplan   +2 more
doaj   +1 more source

Optical Properties of BN in the cubic and in the layered hexagonal phases

, 2001
Linear optical functions of cubic and hexagonal BN have been studied within first principles DFT-LDA theory. Calculated energy-loss functions compare well with experiments and previous theoretical results both for h-BN and for c-BN.
Cappellini, Giancarlo, Onida, Giovanni, Palummo, Maurizia, Satta, Guido   +3 more
core   +1 more source

Better Band Gaps with Asymptotically Corrected Local Exchange Potentials [PDF]

, 2016
We formulate a spin-polarized van Leeuwen and Baerends (vLB) correction to the local density approximation (LDA) exchange potential [Phys. Rev. A 49, 2421 (1994)] that enforces the ionization potential (IP) theorem following Stein et al. [Phys. Rev. Lett.
Harbola, Manoj, Hemanadhan, M., Johnson, D., Johnson, Duane, Mookerjee, Abhijit, Signh, Prashant   +5 more
core   +5 more sources

Selective Separation of the Rare Earth Elements Dysprosium and Neodymium via Tailoring Nanocellulose Chemical Structure

Advanced Functional Materials, EarlyView.
Dicarboxylate‐modified anionic hairy cellulose nanocrystals exhibit a high selectivity for dysprosium(III) over neodymium(III). This selectivity arises from disordered dicarboxylate cellulose “hairs” that enable cooperative ionic coordination, hydrogen bonding, and strain‐induced conformational shrinkage.
Roya Koshani, Shang‐Lin Yeh, Karuna Anna Sajeevan, Mica L. Pitcher, Dawson Alexander, Ratul Chowdhury, Amir Sheikhi   +6 more
wiley   +1 more source

Research Update: Direct conversion of h-BN into pure c-BN at ambient temperatures and pressures in air

APL Materials, 2016
We report a direct conversion of hexagonal boron nitride (h-BN) into pure cubic boron nitride (c-BN) by nanosecond laser melting at ambient temperatures and atmospheric pressure in air.
Jagdish Narayan, Anagh Bhaumik
doaj   +1 more source

Properties of Al contacts to Si surface exposed in the course of plasma etching of previously grown nanocrystalline c-BN film

Journal of Telecommunications and Information Technology, 2005
Properties of Al electric contacts to Si(p) surface exposed to fluorine-based plasma etching of nanocrystalline cubic boron nitride (c-BN) film grown previously were studied and compared to the properties of Al contacts fabricated on pristine or dry ...
Piotr Firek, Aleksander Werbowy, Jan Szmidt, Andrzej R. Olszyna   +3 more
doaj   +1 more source

Electrodischarge Drilling of Microholes in c-BN

Micromachines, 2020
Cubic boron nitride (c-BN) is a “difficult-to-cut” material. High precision machining of this material is problematic because it is difficult to control the material removal rate and maintain acceptable accuracy.
Dominik Wyszynski, Wojciech Bizon, Krzysztof Miernik   +2 more
doaj   +1 more source

Laser Engineering of HfN‐Based Nanoparticles for Safe NIR‐I Photothermal and X‐ray Enhancing Cancer Therapies

Advanced Functional Materials, EarlyView.
In this study, we produced HfN‐based nanoparticles via femtosecond laser ablation in acetone. The nanoparticles exhibit a red‐shifted plasmonic resonance in the NIR‐I window, colloidal stability after coating with polyethyleneglycol, and excellent biocompatibility. The photothermal and X‐ray sensitization therapeutic effects were demonstrated for tumor
Julia S. Babkova, Ivan V. Zelepukin, Lyubov V. Gorelik, Anton L. Popov, Andrei I. Pastukhov, Gleb V. Tikhonowski, Maxim S. Savinov, Danil D. Kolmanovich, Nikita A. Pivovarov, Alina Yu. Kapitannikova, Anton A. Popov, Anna S. Sogomonyan, Vsevolod A. Skribitsky, Aziz B. Mirkasymov, Andrei V. Kabashin, Sergey M. Deyev   +15 more
wiley   +1 more source

Photoluminescence of hexagonal boron nitride: effect of surface oxidation under UV-laser irradiation

, 2008
We report on the UV laser induced fluorescence of hexagonal boron nitride (h-BN) following nanosecond laser irradiation of the surface under vacuum and in different environments of nitrogen gas and ambient air.
Andrei V. Kanaev, Arnaud, Berzina, Blase, Brown, Bäuerle, Carlisle, Carson, Chen, Chen, Davies, Demetrios Anglos, Era, Furthmüller, Geick, Grinyaev, Hirayama, Hoffman, Jean-Pierre Michel, Jean-Pierre Petitet, Jia, Kanaev, Katzir, Kawaguchiaki, Larach, Larach, Leapman, Leapman, Li, Liu, Lopatin, Luc Museur, Lukomskii, MacNaughton, Mansour, Mshima, Solozhenko, Tarrio, Taylor, Watanabe, Watanabe, Wu, Xu, Yao, Yao, Zunger   +45 more
core   +1 more source

Carbides and Nitrides of Zirconium and Hafnium. [PDF]

, 2019
Among transition metal carbides and nitrides, zirconium, and hafnium compounds are the most stable and have the highest melting temperatures. Here we review published data on phases and phase equilibria in Hf-Zr-C-N-O system, from experiment and ab ...
Hong, Qi-Jun, Navrotsky, Alexandra, Ushakov, Sergey V, van de Walle, Axel   +3 more
core   +1 more source