CW-laser-induced spherulitic recrystallization in Sb-Se thin layer system

1998 ◽  
Author(s):  
N. Starbov ◽  
V. Mankov ◽  
K. Starbova ◽  
Konstantin Kolev ◽  
Alain Jadin ◽  
...  
Keyword(s):  
Thin Layer ◽  
Layer System ◽  
Cw Laser

ADHESION BETWEEN AN AFM PROBE AND AN INCOMPRESSIBLE ELASTIC FILM

2004 ◽  
Vol 03 (04n05) ◽  
pp. 599-608 ◽  
Author(s):  
Z. W. ZHENG ◽  
I. SRIDHAR ◽  
K. L. JOHNSON ◽  
W. T. ANG
Keyword(s):  
Thin Layer ◽  
Empirical Equation ◽  
Surface Force ◽  
Contact Radius ◽  
Layer System ◽  
Atomic Force ◽  
Elastic Film ◽  
Afm Probe ◽  
Range Of Values ◽  
Contact Size

The Johnson–Kendal–Roberts (JKR) adhesion theory is frequently applied to extract the surface energy of the contacting thin coating systems in micro or nanoprobe instruments such as Surface Force Apparatus (SFA) and Atomic Force Microscope (AFM). For thin-layer systems, the JKR theory may give rise to erroneous predictions as it is based on the elastic contact between a sphere and a half-space. Adhesion between the thin-layer surfaces has been analyzed by Sridhar et al. using a numerical SJF (Sridhar–Johnson–Fleck) model. In this paper, the adhesion between a spherical tip of an AFM and an incompressible thin elastic film is investigated. When the substrate is rigid, the normalised pull-off force may differ from the JKR value of -0.5 by as much as 90%. Computations of the contact size and pull-off force are presented for a range of values of adhesion energy. Finally, an empirical equation for the adhesive load was developed by curve fitting the compliance of the layer system as a function of contact radius.

scholarly journals Mass transport in water waves over a thin layer of soft viscoelastic mud

2007 ◽  
Vol 573 ◽  
pp. 105-130 ◽  
Author(s):  
CHIU-ON NG ◽  
XUEYAN ZHANG
Keyword(s):  
Mass Transport ◽  
Thin Layer ◽  
Water Waves ◽  
Stokes Equations ◽  
Steady Motion ◽  
Single Layer ◽  
Viscoelastic Layer ◽  
Layer System ◽  
Overlying Water ◽  
Viscoelastic Parameter

A theory is presented for the mass transport induced by a small-amplitude progressive wave propagating in water over a thin layer of viscoelastic mud modelled as a Voigt medium. Based on a sharp contrast in length scales near the bed, the boundary-layer approximation is applied to the Navier–Stokes equations in Lagrangian form, which are then solved for the first-order oscillatory motions in the mud and the near-bed water layers. On extending the analysis to second order for the mass transport, it is pointed out that it is inappropriate, as was done in previous studies, to apply the complex viscoelastic parameter to a higher-order analysis, and also to suppose that a Voigt body can undergo continuous steady motion. In fact, the time-mean motion of a Voigt body is only transient, and will stop after a time scale given by the ratio of the viscosity to the shear modulus. Once the mud has attained its steady deformation, the mass transport in the overlying water column can be found as if it were a single-layer system. It is found that the near-bed mass transport has non-trivial dependence on the mud depth and elasticity, which control the occurrence of resonance. Even when the resonance is considerably damped by viscosity, the mass transport in water over a viscoelastic layer can be dramatically different, in terms of magnitude and direction, from that over a rigid bed.

The photocapacitance effect in the thin layer system CdSe/As2Se3Tlx

1981 ◽  
Vol 76 (2) ◽  
pp. 157-162 ◽  
Author(s):  
I. Chudaček ◽  
P. Mačkus ◽  
A. Smilga
Keyword(s):  
Thin Layer ◽  
Layer System

Comparison of conventional Papanicolaou smears and a fluid-based, thin-layer system for cervical cancer screening

1997 ◽  
Vol 90 (2) ◽  
pp. 278-284 ◽  
Author(s):  
K LEE ◽  
R ASHFAQ ◽  
G BIRDSONG ◽  
M CORKILL ◽  
K MCINTOSH ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Cancer Screening ◽  
Thin Layer ◽  
Cervical Cancer Screening ◽  
Layer System ◽  
Papanicolaou Smears
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