Nanotextured surfaces, applications

Applications of Nanotextured Surfaces Three-dimensional Aspects of Nanofabrication... 

This chapter provides an overview of the latest achievements in research fields that are relevant to the fast expanding field of nanotextured surfaces and discusses possible applications of these surfaces.This chapter provides a better understanding of the mechanisms and mode of operation of nanotextured surfaces in various applications rather than thoroughly reviewing the expanding array of research in this area. 

In this chapter, several applications of nanotextured surfaces, many of which can exhibit superhydrophobic properties, were reviewed. 

For reasons clear from the introduction, enhancement of phosphorescence is a particularly attractive application of plasmonics to OLED technology. Since carriers are injected into an OLED from separate contracts, their spins are uncorrelated and spin statistics dictate preferential formation of triplet excited states. Since these are generally poor emitters at ambient temperature, metallic enhancement of the phosphorescent rate would be desirable. Moreover, triplet states are typically long-lived and prone to oxidation reactions so that reduction of the triplet lifetime could potentially improve stability of the phosphors. PtOEP is a model phosphor and its application to electroluminescence was pioneered by the groups of Forrest and Thomson (46-47). We have investigated plasmonic enhancement of the PtOEP phosphorescence on silver surfaces prepared using the Tollens reaction. Dilute PtOEP in a polymer binder was spin cast onto substrates with various densities of nanotextured silver and assumed to deposit conformally, the spin speed being used to control the approximate thickness of the overlayer. 

In this chapter, the electrochemical applications of various carbon materials in energy conversion, mainly lithium storage and supercapacitors, will be critically discussed taking into account their structure/nanotexture and surface functionality, with some attention for future perspectives. 

Such a well defined nanotexture is interesting for a fundamental study of the double layer capadtance behavior. For a serf of template carbons prepared from different template materials and carbon precursors it has been shown that the cE iacitance, either in aqueous or cnganic medium, increases with the total surface area [66]. As for previous works with activated carbons, the capacitance does not correlate with the BET specific surface area. By contrast, in Fig. 14 a quite linear relationship is observed with the micropore volume determined by CO2 adsorption (micropore size smaller than 0.7 nm [76]). This result confirms that the double layer formed in ultramicropores mainly contributes to tire value of capacitance. Considering the case of flie organic electrolyte, it is obvious that such a pore size is smaller than the diameter of the solvated ions. Hence, it can be concluded that under the application of an electrical polarizaticm, the solvated ions easily diffuse in the mesopores and in the larger micropores for being finally trapped as non-solvated in the small micropores. 

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