Coordinatively Induced Length Control and Photoluminescence of W18O49 Nanorods

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• 作者：Kyoungja Woo ; Jangwon Hong ; Jae-Pyoung Ahn ; Jong-Ku Park ; and Kang-Jin Kim
• 刊名：Inorganic Chemistry
• 出版年：2005
• 出版时间：October 3, 2005
• 年：2005
• 卷：44
• 期：20
• 页码：7171 - 7174
• 全文大小：253K
• 年卷期：v.44,no.20(October 3, 2005)
• ISSN：1520-510X

文摘

A coordinatively induced length control of W₁₈O₄₉ nanorods has been developed using thermal decomposition ofW(CO)₆ in octyl ether solutions of single or mixed capping agents, oleic acid (OA), oleic acid/hexadecylamine(HDA), and oleic acid/trioctylphosphine oxide (TOPO). The order of length for nanorods synthesized with differentcapping agents was OA > OA/HDA > OA/TOPO, which was the opposite of order of their coordinating power. Theorder of crystalline size (diameter × length) from the TEM image was OA/HDA > OA > OA/TOPO and matchedexactly with the order of crystallinity from the XRD pattern. The order of photoluminescence intensity was OA/HDA< OA < OA/TOPO and was the opposite of the order for the crystalline size or crystallinity. The strong coordinatingpower and steric bulkiness of TOPO is thought to interrupt the growth of the nanorods, the rearrangement of theend face atoms, and the fusion of the lateral faces and, thereby, increase the oxygen defects and thephotoluminescence intensity.