نتایج جستجو برای: force absorption

تعداد نتایج: 317725  

2014
PETRA S. Rackwitz H.-C. Wille J. A. Wolny

A combined Raman and atomic force microscope (AFM) microscope has been installed at beamline P01, PETRA III, DESY in Hamburg and is now available for all users of this beamline. With this unique setup 57 Fe nuclear resonance scattering and simultaneously performed Raman or Atomic Force Microscopy experiments are possible. Here we report on technical details of this new sample environment and on...

Journal: :The journal of physical chemistry. B 2016
Jonathan J Booth Dmitrii V Shalashilin

The results of boxed dynamics (BXD) fully atomistic simulations of protein unfolding by atomic force microscopy (AFM) in both force clamp (FC) and velocity clamp (VC) modes are reported. In AFM experiments the unfolding occurs on a time scale which is too long for standard atomistic molecular dynamics (MD) simulations, which are usually performed with the addition of forces which exceed those o...

2012
Wael Mamdouh Yingzhi Li Sherif M. Shawky Hassan M. E. Azzazy Chang-Jun Liu

In this study, we investigate the influence of glow discharge plasma (GDP) on the self-assembly, morphology and binding affinity of streptavidin coated gold nanoparticles (Au-NP-SV) and biotinylated antibody (bAb) adsorbed on a highly oriented pyrolytic graphite (HOPG) substrate. Atomic force microscope (AFM) was used to image the pre- and post-GDP treated samples. The analysis of the AFM image...

2017
Zih-Yao Shen Maw-Tien Lee

Surfactant films on solid surfaces have attracted much attention because of their scientific interest and applications, such as surface treatment agent, or for micro- or nano-scale templates for microfluidic devices. In this study, anionic surfactant sodium dodecyl sulfate (SDS) solutions with various charged inorganic salts was spread on a glass substrate and dried to form an SDS thin film. At...

Journal: :Physical review letters 2012
Sean P McBride Bruce M Law

Atomic force microscopy (AFM) imaging of isolated submicron dodecyltrichlorosilane coated silica spheres, immobilized at the liquid polystyrene- (PS-) air interface at the PS glass transition temperature, T(g), allows for determination of the contact angle θ versus particle radius R. At T(g), all θ versus R measurements are well described by the modified Young's equation for a line tension τ = ...

Journal: :Journal of molecular biology 1998
D M Czajkowsky S Sheng Z Shao

Atomic force microscopy (AFM) was used to study the structure of the staphylococcal alpha-hemolysin (alpha HL) oligomer formed in supported phospholipid bilayers. In contrast to the recent X-ray crystallographic demonstration of a heptameric stoichiometry for the oligomer formed in deoxycholate (DOC) micelles, the high-resolution unprocessed AFM images unequivocally revealed a hexamer in these ...

2000
C. Löfström

The present paper presents applications and feasibility studies of a number of laserspectroscopic techniques in a lean premixed prevaporised (LPP) combustor. Four different laser diagnostic techniques were investigated. The two more mature techniques, Planar Mie Scattering/Laser Induced Fluorescence and Planar Laser Induced Fluorescence of OH were used for fueland OHvisualisation, respectively....

Journal: :ACS applied materials & interfaces 2013
Bob C Fitzmorris Ying-Chih Pu Jason K Cooper Yi-Fang Lin Yung-Jung Hsu Yat Li Jin Z Zhang

In this study we introduce a new method for the one-pot synthesis of core/shell/shell alloyed Cd1-xZnxSe/ZnSe/ZnS QDs and examine the effect of the shell coating on the optical properties and exciton dynamics of the alloy core. The photoluminescence (PL) quantum yield is greatly enhanced after shell growth, from 9.6% to 63%. The exciton dynamics were studied by time correlated single photon cou...

Journal: :ACS nano 2016
Harry Mönig Diego R Hermoso Oscar Díaz Arado Milica Todorović Alexander Timmer Simon Schüer Gernot Langewisch Rubén Pérez Harald Fuchs

In scanning probe microscopy, the imaging characteristics in the various interaction channels crucially depend on the chemical termination of the probe tip. Here we analyze the contrast signatures of an oxygen-terminated copper tip with a tetrahedral configuration of the covalently bound terminal O atom. Supported by first-principles calculations we show how this tip termination can be identifi...

Journal: :Journal of the American Chemical Society 2003
Ilya Reviakine Dimitra K Georgiou Peter G Vekilov

During layerwise growth of crystals, capillarity governs the generation of new crystal layers. Theory predicts that the line tension of the layer edge determines, via the characteristic two-dimensional capillary length L(c), the rates of generation and initial growth of the new layers. To test the correlation between L(c) and the rate of layer generation, we used in situ Tapping Mode Atomic For...

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