(102b) Synthesis of Gold Nanokites by Temperature Controlling Method

Wang, C. - Presenter, School of Food Science and Engineering, Jiangxi Agricultural University
Lai, J., School of Food Science and Engineering
Fang, Y., Jiangnan University

This article describes a simple approach to gold nanokites prepared by the reduction of HAuCl4 in the solution of β-cyclodextrin (β-CD) through controlling reaction temperature. In this approch, β-CD served as both a mild reducing agent and protective agent. However, the reacted temperature was the more important factor that controlled the anisotropic gold nanostructures with various shapes. With a fixed concentration of 0.2 mM HAuCl4 and 0.4% β-CD, as the reaction temperature was 90oC, there were some gold nanotadpoles (about 50 nm long) formed; as 80oC, some branched gold nanostructures with equivalent diameter around 150 nm; as 70 oC, gold nanowires as long as 1μm; as 60 oC, gold nanokites (more than 1μm). Electron diffraction pattern (ED) suggested that these nanokites were single crystalline. UV-Vis absorption spectrum of gold nanoparticles indicated that there were anisotropic nanostures formed in the reacted solutions. The preferred noble metal nanokites may be obtained easily by this simple method.
See more of this Session: Nanofabrication and Nanoscale Processing

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