Abstract
Single crystalline planner gold nanostructures, including nanogears, nanobelts and nanoplates, are synthesised in hexagonal lyotropic liquid crystals made of P123/HAuCl4 aqueous solution. The effects of reaction temperature as well as capping agent on the growth of nanoproducts are studied in detail. When cetyltrimethyl ammonium bromide is used as the capping agent, gold nanobelts appear in the products at 45°C, while gold nanogears can be obtained with a large scale at room temperature when poly(N-vinyl-2-pyrrolidone) is the capping agent. Results show that temperature is an important factor that may influence the growth of gold nanoproducts through changing the lyotropic liquid crystal structure and the adsorption process of capping agent on nanocrystal surfaces. The growth mechanism of nanostructures is further certified by the products from the microwave assistant method.
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