Organic Electrical Double Layer Transistors Based on Rubrene Single Crystals: Examining Transport at High Surface Charge Densities above 1013 cm–2

2011 ◽  
Vol 115 (29) ◽  
pp. 14360-14368 ◽  
Author(s):  
Wei Xie ◽  
C. Daniel Frisbie
Keyword(s):  
Surface Charge ◽  
Single Crystals ◽  
Double Layer ◽  
Electrical Double Layer ◽  
High Surface ◽  
Charge Densities

A study of the relation between electrokinetic potential and surface charge density

1960 ◽  
Vol 258 (1294) ◽  
pp. 319-328 ◽  
Keyword(s):  
Surface Charge ◽  
Double Layer ◽  
Specific Interaction ◽  
Active Agent ◽  
Dielectric Constants ◽  
Independent Evidence ◽  
Charge Densities ◽  
Surface Potentials ◽  
Zeta Potentials ◽  
Surface Active

The problem of relating electrophoretic mobilities to surface charge densities of particles in suspension has been investigated mainly experimentally. The subject has been approached by comparing the surface potentials at an oil/water interface calculated for adsorbed films of ionic surface active agents, with the zeta potentials of oil droplets in similar surface-active agent solutions. When the bulk viscosity and dielectric constant were used in calculating the zeta potentials, the surface and zeta potentials converged towards low surface charge densities. At higher charge densities the zeta potentials fell well below the surface potentials. The reasons for this discrepancy have been investigated. Misapplication of the Gibbs equation, surface hydrolysis of adsorbed ions, specific interaction of adsorbed ions with counter-ions, surface conductivity, internal circulation in the liquid droplets and double-layer dielectric constants and viscosities were considered. By elimination it has been concluded that only enhanced values of the η / D ratio in the electrical double layer can account for the experimental observations. Independent evidence for this phenomenon has been briefly examined. The circumstances under which a reliable value of surface charge may be determined from electrophoretic measurements have been discussed.

Electroosmotic Flow in Nanotubes with High Surface Charge Densities

Nano Letters ◽  
2007 ◽  
Vol 8 (1) ◽  
pp. 42-48 ◽  
Author(s):  
Yunfei Chen ◽  
Zhonghua Ni ◽  
Guiming Wang ◽  
Dongyan Xu ◽  
Deyu Li
Keyword(s):  
Surface Charge ◽  
Electroosmotic Flow ◽  
High Surface ◽  
Charge Densities
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