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Bulk quantities of graphene nanosheets and nanodots have been selectively fabricated by mechanical grinding exfoliation of natural graphite in a small quantity of ionic liquids. The resulting graphene sheets and dots are solvent free with…

Graphene stands as a promising material with vast potential across energy storage, electronics, etc. Here, we present a novel mechanical approach utilizing ultrasonic high-energy intercalation exfoliation to extract monolayer graphene from…

材料科学 · 物理学 2025-01-15 Kaitong Sun , Si Wu , Junchao Xia , Yinghao Zhu , Guanping Xu , Hai-Feng Li

The production of multiple types of graphene, such as free standing, epitaxial graphene on silicon carbide and metals, graphene in solution, chemically grown graphene-like molecules, various graphene nanoribbons, and graphene oxide with…

材料科学 · 物理学 2013-01-14 D. W. Boukhvalov

Graphene-based sponges doped with atomic nitrogen and boron were applied for the electrochemical degradation of persistent organic contaminants in one-pass, flow-through mode, and in a low-conductivity supporting electrolyte. The B-doped…

化学物理 · 物理学 2021-09-30 Luis Baptista-Pires , Giannis-Florjan Norra , Jelena Radjenovic

Aiming to improve fabrication protocols for boron nitride and graphene (h-BNG) lateral heterostructures, we studied the growth of h-BNG thin films on platinum and their behavior in an oxygen environment. We employed a surface science…

This work presents a comparison of the structural, chemical and electronic properties of multi-layer graphene grown on SiC(000-1) by using two different growth approaches: thermal decomposition and chemical vapor deposition (CVD). The…

材料科学 · 物理学 2018-05-03 D. Convertino , A. Rossi , V. Miseikis , V. Piazza , C. Coletti

A great efficacy of molecular quantum chemistry applied to basic graphene problems has been recently demonstrated by the authors when studying the formation of peculiar composites between carbon nanotubes and graphene as well as considering…

介观与纳米尺度物理 · 物理学 2011-02-07 Elena F Sheka , Nadezhda A Popova

Harvesting all sources of available clean energy is an essential strategy to contribute to healing current dependence on non-sustainable energy sources. Recently, triboelectric nanogenerators (TENGs) have gained visibility as new mechanical…

Patterning graphene into various mesoscopic devices such as nanoribbons, quantum dots, etc. by lithographic techniques has enabled the guiding and manipulation of graphene's Dirac-type charge carriers. Graphene, with well-defined strain…

介观与纳米尺度物理 · 物理学 2017-06-09 Péter Nemes-Incze , Gergő Kukucska , János Koltai , Jenő Kürti , Chanyong Hwang , Levente Tapasztó , László P. Biró

Here we develop a class off face centred cubic structure of metallic silver nanocrystals, to enable high ORR activity process. Silver nanoparticles deposited within different carbon supports: carboxylated-graphene, SiO2-doted reduced-…

Owing to wide variety of applications of graphene, high-quality and economical way of synthesizing graphene is highly desirable. In this study, we report a cost effective and simple approach to production of high-quality graphene. Here the…

材料科学 · 物理学 2013-10-29 Prashant Tripathi , Ch. Ravi Prakash Patel , M. A. Shaz , O. N. Srivastava

To grow precisely aligned graphene on h-BN without metal catalyst is extremely important, which allows for intriguing physical properties and devices of graphene/h-BN hetero-structure to be studied in a controllable manner. In this report,…

Graphene, a monolayer of carbon atoms packed into a two-dimensional crystal structure, attracted intense attention owing to its unique structure and optical, electronic properties. Recent advances in chemical vapor deposition (CVD) have led…

材料科学 · 物理学 2020-10-23 Yu-Hao Deng

The recent discovery of methods to isolate graphene, a one-atom-thick layer of crystalline carbon, has raised the possibility of a new class of nano-electronics devices based on the extraordinary electrical transport and unusual physical…

介观与纳米尺度物理 · 物理学 2008-10-02 Xu Du , Ivan Skachko , Anthony Barker , Eva Y. Andrei

We set up an evolutionary algorithm combined with density functional tight-binding (DFTB) calculations to investigate hydrogen adsorption on flat graphene and graphene monolayers curved over substrate steps. During the evolution, candidates…

介观与纳米尺度物理 · 物理学 2018-08-08 G. Ozbal , J. T. Falkenberg , M. Brandbyge , R. T. Senger , H. Sevincli

Various properties of water are affected by confinement as the space-filling of the water molecules is very different from bulk water. In our study, we challenged the creation of a stable system in which water molecules are permanently…

介观与纳米尺度物理 · 物理学 2026-04-28 Tim Verhagen , Jiri Klimes , Barbara Pacakova , Martin Kalbac , Jana Vejpravova

Nanopores of nanometer-size holes are very promising devices for many applications: DNA sequencing, sensory, biosensoring and molecular detectors, catalysis and water desalination. These applications require accurate control over nanopores…

材料科学 · 物理学 2018-09-11 Konstantin V. Zakharchenko , A. V. Balatsky

We demonstrate a method for synthesizing large scale single layer graphene by thermal annealing of ruthenium single crystal containing carbon. Low energy electron diffraction indicates the graphene grows to as large as millimeter dimensions…

材料科学 · 物理学 2007-09-19 Y. Pan , N. Jiang , J. T. Sun , D. X. Shi , S. X. Du , Feng Liu , H. -J. Gao

The growth process of single layer graphene with and without substrate is investigated using ab initio, finite temperature molecular dynamic calculations within density functional theory. An understanding of the epitaxial graphene growth…

材料科学 · 物理学 2012-06-27 V. Ongun Özçelik , S. Cahangirov , S. Ciraci

Graphene, due to its superior stretchability, exhibits rich structural deformation behaviors and its strain-engineering has proven useful in modifying its electronic and magnetic properties. Despite the strain-sensitivity of the Raman G and…

材料科学 · 物理学 2012-09-04 Ji Eun Lee , Gwanghyun Ahn , Jihye Shim , Young Sik Lee , Sunmin Ryu