Results 41 to 50 of about 20,006 (235)

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

van der Waals epitaxy of monolayer hexagonal boron nitride on copper foil : growth, crystallography and electronic band structure [PDF]

, 2015
We investigate the growth of hexagonal boron nitride (h-BN) on copper foil by low pressure chemical vapour deposition (LP-CVD). At low pressure, h-BN growth proceeds through the nucleation and growth of triangular islands.
Asensio, Maria-Carmen, Avila, José, Bell, Gavin R., Cheng, Kai, Marsden, Alexander J., Mudd, James J., Walker, Marc, Wilson, Neil R., Wood, Grace E.   +8 more
core   +1 more source

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Iron oxide doped boron nitride nanotubes: structural and magnetic properties

, 2010
A first-principles formalism is employed to investigate the interaction of iron oxide (FeO) with a boron nitride (BN) nanotube. The stable structure of the FeO-nanotube has Fe atoms binding N atoms, with bond length of roughly $\sim$2.1 \AA, and binding ...
Alan B de Oliveira, Daniel L Rocco, Fjellvåg H, Lee C H, Min Y, Ronaldo J C Batista, Skomski R, Soler J M, Xiang H J, Zaoui A   +9 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

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Bacteria‐Responsive Nanostructured Drug Delivery Systems for Targeted Antimicrobial Therapy

Advanced Materials, EarlyView.
Bacteria‐responsive nanocarriers are designed to release antimicrobials only in the presence of infection‐specific cues. This selective activation ensures drug release precisely at the site of infection, avoiding premature or indiscriminate release, and enhancing efficacy.
Guillermo Landa, Gracia Mendoza, Silvia Irusta, Manuel Arruebo   +3 more
wiley   +1 more source

Tribological behaviour of alumina-based nanocomposites reinforced with uncoated and Ni-coated cubic boron nitride

Journal of Materials Research and Technology, 2019
Currently, there is a rising demand to develop composite materials with outstanding tribological properties along with excellent thermal-mechanical properties for harsh tribological applications.
Muhammad Umar Azam, Bilal Anjum Ahmed, Abbas Saeed Hakeem, Hafiz Muzammil Irshad, Tahar Laoui, Muhammad Ali Ehsan, Faheemuddin Patel, Fazal Ahmad Khalid   +7 more
doaj   +1 more source

The Analysis of the Transformation Mechanism of cBN Crystals with the First-Principle Calculation

Journal of Chemistry, 2020
To clarify the synthesis mechanism of cubic boron nitride (cBN) with catalysts at high temperature and high pressure, we calculate the surface energy of the main phases in the Li-N-B synthesis system using the first-principle method. Based on the density
Lichao Cai, Bin Xu, Meizhe Lv, Xiaohong Fan   +3 more
doaj   +1 more source

Sintering of low-melting glass powders and glass-abrasive composites [PDF]

Science of Sintering, 2003
Sintering of glass powders in Na2O-B2O3-SiO2 and PbO-ZnO-B2O3-SiO2 systems as well as of their mixtures has been studied. The process of sintering is shown to change because of crystallization of the glass of the PbO-ZnO-B2O3-SiO2 system.
Shilo A.E., Bondarev E.K., Kukharenko S.A.   +2 more
doaj   +1 more source