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Zinc oxide particles were synthesized by precipitation from an aqueous solution of zinc nitrate tetrahydrate, R-(+)-cysteine and hexamethylenetetramine (HMTA, urotropine). Hollow microspheres of ZnO–cysteine hybrid material with a diameter of ca. 1μm and a wall thickness ca. 50nm were obtained. After heating up to 850°C pure ZnO microspheres of roughly the same size were formed. The particles were...
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