Gold and silver nanorings formed at the air/water interface |
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Authors: | Hong-Guo Liu Chang-Wei Wang Jia-Pei Wu Yong-Ill Lee Jingcheng Hao |
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Institution: | 1. Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan 250100, China;2. Department of Chemistry, Changwon National University, Changwon 641-773, Republic of Korea |
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Abstract: | Gold nanorings were prepared at the air/water interface through reduction of AuCl4? ions by UV-light irradiation or formaldehyde gas treatment at room temperature templated by thin films of phthalocyanine derivatives. Silver nanorings were produced at the air/water interface via reduction of Ag+ ions by UV-light irradiation templated by poly(9-vinylcarbazole) (PVK) thin films. These nanostructures were investigated by transmission electron microscopy (TEM), selective-area electron diffractometry (SAED), and high-resolution TEM (HRTEM). It was found that the gold nanorings are composed of close-packed nanoplates whose (1 1 0) crystal planes are parallel to the air/water interface; while silver rings are composed of nanoparticles. It is demonstrated that the ring-like aggregates formed by parallel linear supramolecules of the phthalocyanine derivatives and the ring-like structure of PVK supramolecules are responsible for the formation of the gold and silver nanorings, respectively. |
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