Organic surface reactivity, effect

Effect of organic coatings and microbial biofilms on metal oxide surface reactivity - X-ray standing wave studies of metal ion partitioning between coating and surface... 

The comparison of the depth profiles for Ag diffusion in DIP and TMC-PC indicated a similar diffusion mechanism for polymers and organic crystalline materials. For TMCPC, it was shown that a submonolayer of Cr can effectively block the diffusion of Ag into the polymer [13]. Since Cr is a transition metal, it is very reactive. The Cr atoms immediately react with the polymer and do not diffuse into the bulk. On the surface they act as nucleation centres for Ag atoms impinging onto and diffusing across the organic surface. As more Ag atoms are trapped on the surface, diffusion into the material is reduced. If... 

The surface reactivities of ultrathin organic and macromolecular films and assemblies are of central importance to the targeted immobihzation reactions of biomolecules. Compared to reactions that occur rapidly in solution, steric effects and locally altered environments may adversely affect reactivity in substrate-supported architectures [36,37]. Hence the relationship of layer structure to reactivity, highly localized in situ analysis of surface chemical reaction kinetics, and the maximization of surface coverage (molecular loading) by extending the dimensionality of the reactive platform from 2D to quasi-3D will be elaborated on in the following sections. 

Silicone polymers that exhibit good surface modification effects are classified as surfactants. Silicone polymers are derived from a polysiloxane backbone, wherein the reactive sites could be attached to this backbone. The reactive sites are typically reacted to organic moieties forming organomodified siloxane polymers. Such derivatives form a different class of surfactants providing unique properties and applications that differ significantly from traditional surfactants. A Surfactant Science Series volume was published in 1999 that covers a wide spectrum of topics related to the chemistry. 

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