| Abstract
| - The new electrical and optical properties of nanomaterials depend sensitively on both size and shape, whichare of both fundamental and technological interest. This paper introduces a simple chemical method to producecopper particles, which has the ability to shape the particle without using any capping agent or template. Inour synthetic procedure, the reactant concentration and temperature exerted a strong influence on the shapeof the copper particles. At low reactant concentrations, the particles were cubic; at high reactant concentrations,obtained particles were spherical. The number of hollow particles greatly increased when the synthesis wasperformed at low temperature. We also synthesized a copper cubic ring at lower temperature, and it has beenrarely reported. The absorption spectrum of hollow particles showed obvious red shifts, which suggests thepossible assembly of novel optical materials.
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