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Novel hybrid materials of cellulose fibres and doped ZnS nanocrystals
Aaron C. Small,James. H. Johnston 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
During the past decade semiconductor nanocrystals have been studied extensively, in particular ZnS nanocrystals doped with opti-cally active luminescent centres. Such materials have created new opportunities in the areas of photo-voltaic solar cells and light-emittingdiodes. In this study, photoluminescent cellulose bres were prepared by coating bleached Kraft bres (Pinus radiata) with ZnS nano-crystals doped with Mn2+ and Cu2+ ions. In doing so, the inherent properties of the bre (such as tensile strength and exibility) havebeen preserved, but imparted to it are the photoluminescent properties of the coating. A wet chemical synthesis method was used infrom 0.1 to 2 wt%. After successive washings and sonication, the particles remained bonded to the surface of the bre, and the bres wereable to be formed into a paper sheet. Samples were characterized by photoluminescence spectroscopy, scanning electron microscopy, X-ray diraction, energy dispersive spectroscopy and X-ray photoelectron spectroscopy.