Electric-field-induced aggregation of polymeric micelles to construct secondary assembly films

2012 ◽  
Vol 127 (4) ◽  
pp. 2816-2822 ◽  
Author(s):  
Ren Liu ◽  
Jing Luo ◽  
Youhua Tao ◽  
Ye Zhu ◽  
Mingqing Chen ◽  
...  
Keyword(s):  
Electric Field ◽  
Polymeric Micelles ◽  
Induced Aggregation ◽  
Secondary Assembly

PHASE SEPARATION AND TURBIDITY OF ELECTRORHEOLOGICAL FLUIDS

1996 ◽  
Vol 10 (23n24) ◽  
pp. 3093-3101 ◽  
Author(s):  
S. CUTILLAS ◽  
A. MEUNIER ◽  
E. LEMAIRE ◽  
G. BOSSIS ◽  
J. PERSELLO
Keyword(s):  
Electric Field ◽  
Silicone Oil ◽  
Average Length ◽  
Coupling Parameter ◽  
Electrorheological Fluids ◽  
Electrostatic Energy ◽  
Theoretical Interpretation ◽  
Debye Theory ◽  
Induced Aggregation ◽  
Kinetics Of

The turbidity of a suspension of silica particles in a silicone oil is studied in the presence of an electric field. We present experimental results which show a very strong attenuation of a laser beam when the electric field is switched on. We give a theoretical interpretation of these results with the help of a Rayleigh Gans Debye theory applied to cylinders. This model allows us to obtain the average length of the aggregates as a function of the coupling parameter λ, which is me ratio of the electrostatic energy to kT. These results agree with a theoretical prediction and also with the results of Monte-Carlo simulations. The kinetics of the beginning of field induced aggregation can be obtained from the change of the turbidity with time after the application of a voltage step.

pH-Responsive Microrods Produced by Electric-Field-Induced Aggregation of Colloidal Particles

2007 ◽  
Vol 19 (11) ◽  
pp. 1523-1527 ◽  
Author(s):  
D. R. E. Snoswell ◽  
R. K. Brill ◽  
B. Vincent
Keyword(s):  
Electric Field ◽  
Colloidal Particles ◽  
Ph Responsive ◽  
Induced Aggregation

Resolution in photoelectron microscopy

1991 ◽  
Vol 49 ◽  
pp. 458-459
Author(s):  
G. F. Rempfer
Keyword(s):  
Electron Microscopy ◽  
Electric Field ◽  
Ultraviolet Light ◽  
Uniform Field ◽  
Virtual Image ◽  
Lens System ◽  
Photoemission Electron Microscopy ◽  
Planar Electrode ◽  
Electron Lens ◽  
Photoemission Electron

In photoelectron microscopy (PEM), also called photoemission electron microscopy (PEEM), the image is formed by electrons which have been liberated from the specimen by ultraviolet light. The electrons are accelerated by an electric field before being imaged by an electron lens system. The specimen is supported on a planar electrode (or the electrode itself may be the specimen), and the accelerating field is applied between the specimen, which serves as the cathode, and an anode. The accelerating field is essentially uniform except for microfields near the surface of the specimen and a diverging field near the anode aperture. The uniform field forms a virtual image of the specimen (virtual specimen) at unit lateral magnification, approximately twice as far from the anode as is the specimen. The diverging field at the anode aperture in turn forms a virtual image of the virtual specimen at magnification 2/3, at a distance from the anode of 4/3 the specimen distance. This demagnified virtual image is the object for the objective stage of the lens system.

Sign in / Sign up

Export Citation Format

Share Document