نتایج جستجو برای: nanometric grafting

تعداد نتایج: 31169  

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...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1390

پلیمرها مواد با اهمیت و مهمی در جهان هستند که در وسایل و دستگاه?های مختلف کاربرد فراوان دارند و لذا بهبود بخشیدن این مواد به هر نحو ممکن مهم و ضروری می?باشد و در نتیجه پیدا کردن روش?های سنتز یا مواد افزاینده که بتواند خواص پلیمر را بهبود بخشد بسیار مهم و ضروری می?باشد. یکی از موادی که می?تواند به طور قابل ملاحظه?ای این خواص را بهبود می?بخشد اضافه نمودن مواد نانو به عنوان مواد افزاینده می?باشد ...

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...

Journal: :Macromolecular Chemistry and Physics 2023

Confining polymers to nanometric sizes often interferes with the characteristic length scales of structure formation and thus significantly alters crystallization or nucleation behavior at nanoscale. To investigate such effects in samples, past studies relied either on heavily constraining environments like block copolymer mesophases deposited droplets that exhibit significant variation size, r...

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 ...

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