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Boron

About: Boron is a research topic. Over the lifetime, 36421 publications have been published within this topic receiving 521321 citations. The topic is also known as: B & element 5.


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Journal ArticleDOI
18 Dec 2015-Science
TL;DR: At Atomic-scale characterization, supported by theoretical calculations, revealed structures reminiscent of fused boron clusters with multiple scales of anisotropic, out-of-plane buckling that are consistent with predictions of a highly an isotropic, 2D metal.
Abstract: At the atomic-cluster scale, pure boron is markedly similar to carbon, forming simple planar molecules and cage-like fullerenes. Theoretical studies predict that two-dimensional (2D) boron sheets will adopt an atomic configuration similar to that of boron atomic clusters. We synthesized atomically thin, crystalline 2D boron sheets (i.e., borophene) on silver surfaces under ultrahigh-vacuum conditions. Atomic-scale characterization, supported by theoretical calculations, revealed structures reminiscent of fused boron clusters with multiple scales of anisotropic, out-of-plane buckling. Unlike bulk boron allotropes, borophene shows metallic characteristics that are consistent with predictions of a highly anisotropic, 2D metal.

1,873 citations

Journal ArticleDOI
TL;DR: In this paper, Boron and nitrogen-doped graphenes are prepared by the arc discharge between carbon electrodes or by the transformation of nanodiamond under appropriate atmospheres using a combination of experiment and theories based on first principles.
Abstract: Boron- and nitrogen-doped graphenes are are prepared by the arc discharge between carbon electrodes or by the transformation of nanodiamond under appropriate atmospheres. Using a combination of experiment and theories based on first principles, systematic changes in the carrier-concentration and electronic structure of the doped graphenes are demonstrated. Stiffening of the G-band mode and intensification of the defect-related D-band in the Raman spectra are also observed.

1,579 citations

Journal ArticleDOI
Glen A. Slack1
TL;DR: The diamond has the highest known thermal conductivity at 300k K at room temperature as discussed by the authors, and is the only non-metallic crystal with thermal conductivities of > 1 W/cmK at 300K.

1,523 citations

Journal ArticleDOI
23 Feb 2010-Langmuir
TL;DR: The photodegradation mechanisms for two typical dyes, rhodamine B (Rh B) and methyl orange (MO), are proposed based on comparison experiments and the electron paramagnetic resonance was used to detect the active species for the photodegrading reaction over g-C(3)N(4).
Abstract: Graphitic carbon nitride (g-C3N4) and boron-doped g-C3N4 were prepared by heating melamine and the mixture of melamine and boron oxide, respectively. X-ray diffraction, X-ray photoelectron spectroscopy, and UV−vis spectra were used to describe the properties of as-prepared samples. The electron paramagnetic resonance was used to detect the active species for the photodegradation reaction over g-C3N4. The photodegradation mechanisms for two typical dyes, rhodamine B (Rh B) and methyl orange (MO), are proposed based on our comparison experiments. In the g-C3N4 photocatalysis system, the photodegradation of Rh B and MO is attributed to the direct hole oxidation and overall reaction, respectively; however, for the MO photodegradation the reduction process initiated by photogenerated electrons is a major photocatalytic process compared with the oxidation process induced by photogenerated holes. Boron doping for g-C3N4 can promote photodegradation of Rh B because the boron doping improves the dye adsorption and...

1,495 citations

Journal ArticleDOI
TL;DR: Experimental work is presented showing that two-dimensional boron sheets can be grown epitaxially on a Ag(111) substrate and density functional theory simulations agree well with experiments, and indicate that both sheets are planar without obvious vertical undulations.
Abstract: A variety of two-dimensional materials have been reported in recent years, yet single-element systems such as graphene and black phosphorus have remained rare. Boron analogues have been predicted, as boron atoms possess a short covalent radius and the flexibility to adopt sp2 hybridization, features that favour the formation of two-dimensional allotropes, and one example of such a borophene material has been reported recently. Here, we present a parallel experimental work showing that two-dimensional boron sheets can be grown epitaxially on a Ag(111) substrate. Two types of boron sheet, a β12 sheet and a χ3 sheet, both exhibiting a triangular lattice but with different arrangements of periodic holes, are observed by scanning tunnelling microscopy. Density functional theory simulations agree well with experiments, and indicate that both sheets are planar without obvious vertical undulations. The boron sheets are quite inert to oxidization and interact only weakly with their substrate. We envisage that such boron sheets may find applications in electronic devices in the future. A variety of two-dimensional materials have been reported in the past few years, yet single-element systems—such as graphene and black phosphorus—have remained rare. 2D allotropes of boron have long been predicted and recently investigated. Two boron sheets have now been grown on a Ag(111) surface by molecule beam epitaxy that exhibit significant chemical stability against oxidation.

1,279 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231,611
20223,145
2021923
20201,065
20191,279
20181,287