Abstract
In this work, a convenient method combining physical and chemical templates is presented to obtain a regular arrangement of CdS nanocrystallites. Poly (ethylene oxide) (PEO) is used to control the crystallite sizes as a chemical template and Si-based anodic aluminum oxide (AAO) act as a physical template to form an ordered arrangement of nanocrystallites. TEM images and SEAD patterns reveal that the CdS/PEO composite deposited into the nanopores of the Si-based AAO films is in a tube shape. In UV/Vis spectra, the absorption onsets of the CdS nanocrystallites shift to a shorter wavelength with decreasing Cd 2+ concentration in PEO. The corresponding photoluminescence (PL) peaks are all located at about 630 nm due to the sulfur vacancies, while their intensities increase with the increasing mol ratio of Cd 2+/PEO. This method will provide more choices to prepare optoelectronic materials.
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