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We revisited the phase diagram of the second layer of 4He on top of graphite using quantum Monte Carlo methods. Our aim was to explore the existence of the novel phases suggested recently in experimental works, and determine their…

其他凝聚态物理 · 物理学 2020-06-24 M. C. Gordillo , J. Boronat

Graphite is one of the most chemically inert materials. Its elementary constituent, monolayer graphene, is generally expected to inherit most of the parent material's properties including chemical inertness. Here we show that, unlike…

Advanced composites are used in a variety of industrial applications and therefore attract much scientific interest. Here we describe the formation of novel carbon-based nanocomposites via incorporation of graphene oxide into the crystal…

Time kinetics of interaction of natural graphite (GR) to colloidal graphene (G) collagen (C) nanocomposites was studied at ambient conditions, and observed that just one day at ambient conditions is enough to form colloidal graphene…

生物大分子 · 定量生物学 2015-12-01 Soumya Bhattacharya , Purbarun Dhar , Sarit K Das , Ranjan Ganguly , Thomas Webster , Suprabha Nayar

Intrinsic layered structure of graphite is the source of ongoing and expanding search of ways of obtaining low-cost and promising graphite thin layers. We report on a novel method of obtaining and separating rubbed graphite sheets by using…

材料科学 · 物理学 2015-06-23 Manuel R. Mailian , Aram R. Mailian

Surfactants are often used to stabilise two-dimensional (2D) materials in environmentally friendly solvents such as water. Aqueous-surfactant solutions prevent agglomeration of nanosheets through steric and electrostatic repulsion,…

材料科学 · 物理学 2021-11-05 Diego Tomohisa Pérez-Álvarez , Philip Davies , Jason Stafford

Solution-processed few-layers graphene flakes, dispensed to rotating and sliding contacts via liquid dispersions, are gaining increasing attention as friction modifiers to achieve low friction and wear at technologically-relevant…

介观与纳米尺度物理 · 物理学 2023-07-28 Renato Buzio , Andrea Gerbi , Cristina Bernini , Luca Repetto , Andrea Silva , Andrea Vanossi

Electron diffraction, imaging, and energy loss provide evidence for unlayered graphene sheets in the core of certain interstellar graphite onions (from the meteorite Murchison) whose isotopes indicate formation in the atmosphere of…

材料科学 · 物理学 2007-05-23 Eric Mandell , Nathaniel Hunton , P. Fraundorf

Graphene flakes were produced by nanosecond plasma discharge at atmospheric pressure between an electrode and the surface of distilled water, in which were placed graphite flakes. The discharge ionizes the gas and forms free radicals on the…

Colloidal probe Atomic Force Microscopy allows to explore sliding states of vanishing friction, i.e. superlubricity, in mesoscopic graphite contacts. Superlubricity is known to appear upon formation of a triboinduced transfer layer,…

介观与纳米尺度物理 · 物理学 2023-09-07 Renato Buzio , Andrea Gerbi , Cristina Bernini , Luca Repetto , Andrea Vanossi

High surface area graphene sheets were obtained by electrochemical exfoliation of graphite in an acid media under constant potential conditions. Filtration and centrifugation processes played an important role in order to obtain stable…

材料科学 · 物理学 2016-06-22 M. Hurtado-Morales , M. Ortiz , C. Acuna , H. C. Nerl , V. Nicolosi , Y. Hernandez

We study the possibility of excitonic pairing in layered degenerate semimetals such as graphite, where the electron density of states almost vanishes at the Fermi level and, therefore, the Coulomb interactions remain essentially unscreened.…

凝聚态物理 · 物理学 2009-11-10 H. Leal , D. V. Khveshchenko

We report the exfoliation of graphite in aqueous solutions under high shear rate [$\sim10^8s^{-1}$] turbulent flow conditions, with a 100\% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L…

Moir\'e superlattices in graphene supported on various substrates have opened a new avenue to engineer graphene's electronic properties. Yet, the exact crystallographic structure on which their band structure depends remains highly debated.…

In this work a representative nickel superalloy, Ni70W20Nb10, was investigated in the presence of chlorine to quantify its early-stage dissolution behavior. Surface structures were generated from a bulk configuration sampled in equilibrium…

材料科学 · 物理学 2025-07-29 Tyler D. Doležal , Adib J. Samin

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

Herein, we report an easy, straight forward, and versatile approach to build 0D/2D hybrid nanoparticle/graphene architectures by means of non-covalent chemistry and a modified Layer-by-Layer assembly. Three water soluble perylene diimides…

Electronic correlations in two-dimensional materials play a crucial role in stabilising emergent phases of matter. The realisation of correlation-driven phenomena in graphene has remained a longstanding goal, primarily due to the absence of…

介观与纳米尺度物理 · 物理学 2023-09-19 Saisab Bhowmik , Arindam Ghosh , U. Chandni

Results based on {\em ab initio} density functional calculations indicate a general graphitization tendency in ultrathin slabs of cubic diamond, boron nitride, and many other cubic structures including rocksalt. Whereas such compounds often…

材料科学 · 物理学 2015-06-22 Pavel B. Sorokin , Alexander G. Kvashnin , Zhen Zhu , David Tománek

When polyelectrolyte-neutral block copolymers are mixed in solutions to oppositely charged species (e.g. surfactant micelles, macromolecules, proteins etc), there is the formation of stable supermicellar aggregates combining both…

软凝聚态物质 · 物理学 2007-05-23 J. -F. Berret , K. Yokota , M. Morvan
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