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Efficient mixing and pumping of liquids at the microscale is a technology that is still to be optimized. The combination of an AC electric field with a small temperature gradient leads to a strong electro-thermal flow that can be used for…

Fluid Dynamics · Physics 2024-03-18 Carlos David González Gómez , Raúl A. Rica , Emilio Ruiz-Reina

Room temperature ferromagnetic materials composed only by light elements like carbon, hydrogen and/or nitrogen, so called carbon magnet, are very attractive for creating new material categories both in science and industry. Recently several…

Mesoscale and Nanoscale Physics · Physics 2011-01-24 Norio Ota , Narjes Gorjizadeh , Yoshiyuki Kawazoe

Electron emission spectra of gold nanoparticles (AuNPs) after photon interaction were measured over the energy range between 50 eV and 9500 eV to provide reference data for Monte Carlo radiation-transport simulations. Experiments were…

Medical Physics · Physics 2023-04-19 Hans Rabus , Philine Hepperle , Christoph Schlueter , Andrei Hloskovsky , Woon Yong Baek

Nano-graphene /polymer composites can functionas pressure induced electro-switches, at concentrations around their conductivity percolation threshold. Close to the critical point, the pressure dependence of the electron tunneling through…

Materials Science · Physics 2021-03-30 E. Kolonelou , E. Loupou , P. Klonos , A. E. Sakellis , D. Valadorou , A. Kyritsis , A. N. Papathanassiou

We present a thermal device based on the near-field interaction between two substrates made of a polar and a metal-insulator-transition material. As a result of the temperature dependence of the optical properties, this device acts as a…

Applied Physics · Physics 2022-06-03 Simon Landrieux , Philippe Ben-Abdallah , Riccardo Messina

The electronic properties of graphene decorated with Ni, Co, Cu and Zn adatoms is studied with the density functional theory approach. Within the analysis the spin-orbit interaction is taken into account. We focus on the case when the…

Applied Physics · Physics 2019-03-01 Malgorzata Wawrzyniak-Adamczewska

We report the results of our first-principles investigation on the interaction of the nucleobases adenine (A), cytosine (C), guanine (G), thymine (T), and uracil (U) with graphene, carried out within the density functional theory framework,…

Materials Science · Physics 2007-07-05 S. Gowtham , Ralph H. Scheicher , Rajeev Ahuja , Ravindra Pandey , Shashi P. Karna

Pristine graphene interacts relatively weakly with Al, which is a specie of importance for novel generations of metal-ion batteries. We employ DFT calculations to explore the possibility of enhancing Al interaction with graphene. We…

Materials Science · Physics 2021-06-23 Jovana Vlahović , Ana S. Dobrota , Natalia V. Skorodumova , Igor A. Pašti

Hydrogen adatoms and other species covalently bound to graphene act as resonant scattering centers affecting the electronic transport properties and inducing Anderson localization. We show that attractive interactions between adatoms on…

Mesoscale and Nanoscale Physics · Physics 2014-12-11 Fernando Gargiulo , Gabriel Autès , Naunidh Virk , Stefan Barthel , Malte Rösner , Lisa R. M. Toller , Tim O. Wehling , Oleg V. Yazyev

The influence of GaN nanowires on the optical and electrical properties of graphene deposited on them was studied using Raman spectroscopy and microwave induced electron transport method. It was found that interaction with the nanowires…

We theoretically study the transport properties of both monolayer and bilayer graphene in the presence of electron-hole puddles induced by charged impurities which are invariably present in the graphene environment. We calculate the…

Mesoscale and Nanoscale Physics · Physics 2011-09-28 Qiuzi Li , E. H. Hwang , S. Das Sarma

Assemblies of plasmonic nanoparticles (NPs) support hybridized modes of localized surface plasmons (LSPs), which delocalize in geometrically well-ordered arrangements. Here, the hybridization behavior of LSPs in geometrically completely…

Gallium nanoparticles (Ga-NPs) exhibit promising plasmonic properties spanning ultraviolet to infrared spectral regions, making them suitable for diverse nanophotonic applications. However, the synthesis of uniform and ordered Ga-NP arrays…

An amphiphilic nature of the surfactant-like peptides is responsible for their propensity to aggregate at the nanoscale. These peptides can be readily used for a non-covalent functionalization of nanoparticles and macromolecules. This work…

Materials Science · Physics 2015-10-28 Vitaly V. Chaban , Andre Arruda , Eudes Eterno Fileti

Graphene devices require electric contacts with metals, particularly with gold. Scanning tunneling spectroscopy studies of electron local density of states performed on mono-, bi- and tri- graphene layer deposited on metallic conductive…

Materials Science · Physics 2009-01-05 Z. Klusek , P. Dabrowski , P. Kowalczyk , W. Kozlowski , P. Blake , M. Szybowicz , T. Runka , W. Olejniczak

In spite of years of intense research, graphene continues to produce surprising results. Recently, it was experimentally observed that under certain conditions graphene can self-drive its tearing and peeling from substrates. This process…

Mesoscale and Nanoscale Physics · Physics 2018-01-17 Alexandre F. Fonseca , Douglas S. Galvao

Graphyne nanotubes (GNTs) are nanostructures obtained from rolled up graphyne sheets, in the same way carbon nanotubes (CNTs) are obtained from graphene ones. Graphynes are 2D carbon-allotropes composed of atoms in sp and sp2 hybridized…

We report the synthesis of single and bi layer graphene films by low pressure chemical vapor deposition technique on Cu and Au substrates. The as grown films were characterized by transmission electron microscopy, scanning electron…

Materials Science · Physics 2021-09-06 Ch. Ravi Prakash Patel , K. Awasthi , Thaur Prasad Yadav

Nanostructuring materials at small scales enables control over their physical properties, revealing behaviors not observed at larger dimensions. This strategy is particularly effective in two-dimensional (2D) materials, where surface…

A new method based on the combination of small-anglescattering, reverse Monte Carlo simulations, and an aggregate recognition algorithm is proposed to characterize the structure of nanoparticle suspensions in solvents and polymer…