Zinc oxide surface texture

A textured metallocene polyethylene foam sheet suitable for use in a floor covering is made using a highly coactivated azodicarbonamide package which blows the metallocene polyethylene effectively. The preferred coactivators are zinc oxide and urea. The textured surface of metallocene polyethylene foam is formed by a chemical embossing process which utilises a liquid triazole having an alkyl moiety as a foam-expansion inhibitor. The triazole is dissolved in a non-polar solvent to form the foam inhibitor. The preferred inhibitor is a hydrocarbon which may be halogenated. 

A promising alternative is surface textured doped zinc oxide films. ZnO films can offer excellent transparency and are highly resistant to hydrogen plasmas [78]. Textured ZnO films have been prepared by several deposition techniques. Examples are boron doped zinc oxide (ZnO B) prepared by low-pressure chemical vapor deposition (LPCVD) ([79,80], see also Chap. 6) or ZnO films deposited by expanding thermal plasma CVD [81], Quite recently, ZnO films for back contacts of solar modules have been developed using chemical bath deposition [82]. 

The combined importance of the chemical nature and the porous texture of a carbonaceous adsorbent was emphasized in the study of Petrov et al. [189], who examined the uptakes of copper, zinc, cadmium, and lead on as-received and oxidized anthracite. A subsequent study by the same group 1190, using the same adsorbates but different adsorbents, ignores the porous texture effects, reemphasizes the great significance of the chemical nature of the carbon surface, and also highlights the different effects observed for different metals by switching from one adsorbent to another. 

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