Surfactant Adsorption at Solid−Aqueous Interfaces Containing Fixed Charges:  Experiments Revealing the Role of Surface Charge Density and Surface Charge Regulation

2004 ◽  
Vol 108 (5) ◽  
pp. 1667-1676 ◽  
Author(s):  
Aysen Tulpar ◽  
William A. Ducker
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Surface Charge Density ◽  
Surfactant Adsorption ◽  
Aqueous Interfaces ◽  
Charge Regulation ◽  
Fixed Charges

Interfacial valinomycin-K+ and antamanide-Na+ complex: Role of the surface charge density

1981 ◽  
Vol 81 (2) ◽  
pp. 410-418 ◽  
Author(s):  
J. Caspers ◽  
M. Landuyt-Caufriez ◽  
J. Ferreira ◽  
E. Goormaghtigh ◽  
J.M. Ruysschaert
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Surface Charge Density

scholarly journals Role of Surface Charge Density in Nanoparticle-Templated Assembly of Bromovirus Protein Cages

ACS Nano ◽  
2010 ◽  
Vol 4 (7) ◽  
pp. 3853-3860 ◽  
Author(s):  
Marie-Christine Daniel ◽  
Irina B. Tsvetkova ◽  
Zachary T. Quinkert ◽  
Ayaluru Murali ◽  
Mrinmoy De ◽  
...  
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Surface Charge Density ◽  
Protein Cages

Role of the capping agent in the interaction of hydrophilic Ag nanoparticles with DMPC as a model biomembrane

2016 ◽  
Vol 3 (2) ◽  
pp. 462-472 ◽  
Author(s):  
Julie V. Maya Girón ◽  
Raquel V. Vico ◽  
Bruno Maggio ◽  
Eugenia Zelaya ◽  
Aldo Rubert ◽  
...  
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Ag Nanoparticles ◽  
Surface Charge Density ◽  
Chemical Nature ◽  
Capping Agent

Citrate and 4-mercaptobenzoic acid capped AgNPs differentially interact with the DMPC model biomembrane. An explanation based on the surface charge density and on the chemical nature of the capping agent is discussed.

scholarly journals Surface Charge Density of Maghemite Nanoparticles:  Role of Electrostatics in the Proton Exchange

2007 ◽  
Vol 111 (50) ◽  
pp. 18568-18576 ◽  
Author(s):  
I. T. Lucas ◽  
S. Durand-Vidal ◽  
E. Dubois ◽  
J. Chevalet ◽  
P. Turq
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Surface Charge Density ◽  
Proton Exchange ◽  
Maghemite Nanoparticles

Nano ellipsoids at the fluid–fluid interface: effect of surface charge on adsorption, buckling and emulsification

2016 ◽  
Vol 186 ◽  
pp. 419-434 ◽  
Author(s):  
Venkateshwar Rao Dugyala ◽  
Thiriveni G. Anjali ◽  
Siliveru Upendar ◽  
Ethayaraja Mani ◽  
Madivala G. Basavaraj
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Surface Charge Density ◽  
Particle Surface ◽  
Interfacial Properties ◽  
Fluid Interfaces ◽  
Particle Interactions ◽  
Kinetics Of Adsorption ◽  
Emulsion Drops

In this contribution, we discuss the role of surface charge on the adsorption of shape anisotropic particles to fluid–fluid interfaces in the context of their application in particle-stabilized emulsions. Starting with a pendent aqueous drop containing nano-ellipsoids of known surface charge density suspended in an oil medium, we study the kinetics of adsorption of the ellipsoids to the water–decane interface using pendant drop tensiometry. The interfacial tension of the drop is recorded as a function of time by analyzing the shape of the drop. We show that the particles that are weakly charged readily adsorb to the water–decane interface and the adsorption behavior is influenced by the particle surface charge density. Furthermore, as the area available for the particles deposited at the interface is reduced, the interface populated with self-assembled ellipsoids shows wrinkles indicating buckling of the particle-laden interface under compression. However, the buckling is not observed if nano-ellipsoids are highly charged confirming that the particles do not adsorb to the interface when they are highly charged. This suggests that in several examples where the particles at interfaces concept is exploited, the repulsive energy barrier due to the particle surface charge plays a key role in the adsorption of particles to the interfaces. However, once the particles are adsorbed, the interfacial properties of the monolayer depend on the particle–particle interactions. Thus a combination of these interactions determines the concentration of particles at the interface, their microstructure and interfacial properties. The effect of these interactions on the quantity and size of the emulsion drops stabilized by ellipsoidal particles is also explored.

Role of Electric Field on Electroviscosity

2013 ◽  
Vol 803 ◽  
pp. 438-441
Author(s):  
Yun Lu Pan ◽  
Da Yong Li ◽  
Xue Zeng Zhao
Keyword(s):  
Electric Field ◽  
Charge Density ◽  
Surface Charge ◽  
Liquid Flow ◽  
Surface Charge Density ◽  
Electric Filed

The drag of liquid flow is of interest in micro/nanoscale. Electroviscosity is one of the important factors which can affect drag. By applying electric filed between liquid and surface, the surface charge density can be changed, leading to a change of electroviscosity. This paper experimentally studied the effect of applying electric field on the surface charge density, and analyzed the change of electroviscosity with applying electric field. The electroviscosity is found abated with applying electric field which will decrease the drag of liquid flow.

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