نتایج جستجو برای: nanometric

تعداد نتایج: 1553  

2017
Jinshi Wang Fengzhou Fang Xiaodong Zhang

Materials with specific nanometric layers are of great value in both theoretical and applied research. The nanometric layer could have a significant influence on the response to the mechanical loading. In this paper, the nanometric cutting on the layered systems of silicon has been studied by molecular dynamics. This kind of composite structure with amorphous layer and crystalline substrate is ...

2016
Albert Boretti Stefania Castelletto

This contribution highlights and compares some recent achievements in the use of k-space and real space imaging (scanning probe and wide-filed microscope techniques), when applied to a luminescent color center in diamond, known as nitrogen vacancy (NV) center. These techniques combined with the optically detected magnetic resonance of NV, provide a unique platform to achieve nanometric magnetic...

Journal: :Proceedings of the National Academy of Sciences 2009

2009
QX Pei C Lu HP Lee YW Zhang

Nanometric cutting involves materials removal and deformation evolution in the surface at nanometer scale. At this length scale, atomistic simulation is a very useful tool to study the cutting process. In this study, large-scale molecular dynamics (MD) simulations with the model size up to 10 millions atoms have been performed to study three-dimensional nanometric cutting of copper. The EAM pot...

Journal: :Biophysical journal 2007
Jérôme Wenger Fabien Conchonaud José Dintinger Laure Wawrezinieck Thomas W Ebbesen Hervé Rigneault Didier Marguet Pierre-François Lenne

We describe the development of a new methodology to probe the plasma membrane organization of living cells at the nanometric scale. Single nanometric apertures in a metallic film limit the observed membrane area below the optical diffraction barrier. The new approach performs fluorescence correlation spectroscopy with increasing aperture sizes and extracts information on the diffusion process f...

Journal: :Faraday discussions 2009
Manhee Lee Baekman Sung N Hashemi Wonho Jhe

We present a novel method for investigating a nanometric cluster of water molecules, which includes the formation and manipulation of nanometric water, and the measurement of its mechanical properties. The atomic force microscope based on the quartz tuning-fork sensor is employed to form and manipulate the nanometric water, and the theoretical tool of amplitude-modulation atomic force microscop...

2010
Reza Aboofazeli

Nanotechnology, shortened to nanotech, is the study of the controlling of matter on an atomic and molecular scale. Generally, nanotechnology deals with structures sized between 1 to 100 nanometer in at least one dimension and involves developing materials or devices within that size. The use of nanotechnology in the field of pharmaceutics and drug delivery has grown over the last few years, so ...

2016
Francisco J. Azcona Ajit Jha Carlos Yáñez Reza Atashkhooei Santiago Royo

Microcantilever motion detection is a useful tool for the characterization of the physical, chemical and biological properties of materials. In the past, different approaches have been proposed and tested to enhance the behavior, size and simplicity of microcantilever motion detectors. In this paper, a new approach to measure microcantilever motion with nanometric resolution is presented. The p...

Journal: :J. Computational Applied Mathematics 2014
Maya Lakhdara Saïda Latreche Christian Gontrand

We present, in this paper the mathematical approach for optimization nanometric thickness of the SiGeC base heterojunction bipolar transistors (HBTs), realized in BiCMOS industrial process. However, use of these components in applications microwave radio frequencies implores the use of complex structures shrinking. The base SiGeC is the active part of the transistor, the optimization of the nan...

Journal: :international journal of nano dimension 0
g.r. shahhosseini agricultural , medical and industrial research school – nuclear science and techniques research institute–karaj, iran. f. asadifard nursing and midwifery faculty, karaj islamic azad university, karaj, iran. m. enayatollahi biomedical engineering faculty, islamic azad university science and research branch, tehran, iran. m. shapourgan biomedical engineering faculty, islamic azad university science and research branch, tehran, iran. r. haghjo biomedical engineering faculty, islamic azad university science and research branch, tehran, iran. s. heidari keshel stem cell preparation unit, farabi hospital, tehran university medical science, tehran, iran.

poly n-isopropylacrylamide was successfully grafted onto a polystyrene cell culture dish by gamma ray. in this study, the effect of a radiation dose (radiation absorbed dosages of 10, 20, 30, 40 kgy) under appropriate temperature and grafting conditions was investigated. the ftir analysis showed the existence of the graft pnipaam on the substrate. the optimal value of the dose for grafting was ...

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