Inorganic surface enhancer

In thick samples, a boron oxide/boron carbide crust has been detected on the surface of the polymer. This inorganic surface layer has a shielding effect on the inner polymer layers, further enhancing the thermal stability of the material. Poly(m-carborane-siloxane)s have therefore been considered as surface coatings for organic materials, providing protection from erosion effects. 

Advanced functional inorganic nanoparticles (NPs) have been studied intensively in the last couple of decades due to their unusual chemical and physical properties compared with their bulk materials, which enable them to be promising in applications as diverse as electronics,1 optics,2 optoelectronics,3 nanosensors,4 information storage,5 fuel cells,6 biomedicine,7 biological labeling,8 gene delivery,9 electrocatalysis,10 and surface enhanced Raman scattering (SERS).11,12 For instance, metal NPs with... 

Inorganic Hot spots in surface-enhanced Raman scattering 115... 

In the acidic route (with pH < 2), both kinetic and thermodynamic controlling factors need to be considered. First, the acid catalysis speeds up the hydrolysis of silicon alkoxides. Second, the silica species in solution are positively charged as =SiOH2 (denoted as I+). Finally, the siloxane bond condensation rate is kinetically promoted near the micelle surface. The surfactant (S+)-silica interaction in S+X 11 is mediated by the counterion X-. The micelle-counterion interaction is in thermodynamic equilibrium. Thus the factors involved in determining the total rate of nanostructure formation are the counterion adsorption equilibrium of X on the micellar surface, surface-enhanced concentration of I+, and proton-catalysed silica condensation near the micellar surface. From consideration of the surfactant, the surfactants first form micelles as a combination of the S+X assemblies, which then form a liquid crystal with molecular silicate species, and finally the mesoporous material is formed through inorganic polymerization and condensation of the silicate species. In the S+X I+ model, the surfactant-to-counteranion... 

T. Solid surface enhancement effects on chemiluminescence diaryloxalate as chemiluminescent reagent and inorganic materials as media solids. Bull Chem Soc Jpn 2001 74 1507-16. 

As a final comment, the self-passivation response is not only advantageous for enhancing durability in service, but also provides unique opportunities for post-processing modification of nanocomposites. For example, pretreatment of the nanocomposite in oxygen plasma may enhance the materials resistance to thermal-oxidative or UV-electron environments. Alternatively, self-generation of the inorganic surface on commercial nanocomposites films may enhanced barrier properties before introduction to service. 

Polymer honeycomb films can be also used as templates to produce micropattemed inorganic/organic structures by external deposition of NPs or chemical vacuum deposition CVD. The selective assembly of the Si02 NPs into the pores is strongly impacted by the wettability and thus the Cassie-Baxter/ Wenzel transition was demonstrated as the key factor of such an approach [182]. Cadmium tellurium quantum dots were deposited onto polystyrene honeycomb film leading to red emitting films [183]. Recently, surface-enhanced Raman Scattering SERS substrates were also prepared by Ag NPs adsorption onto poly (AW-dimethylaminoethyl methacrylate) PDMAEMA surface [184]. 

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