Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1524376 | Materials Chemistry and Physics | 2011 | 4 Pages |
Abstract
In this work, we report a new pathway to prepare clean gold nanoparticles in neutral solutions with aid of natural chitosan. First, an Au substrate was cycled in a deoxygenated aqueous solution containing 0.1N NaCl and 1 g Lâ1 chitosan from â0.28 to +1.22 V vs. Ag/AgCl at 500 mV sâ1 for 200 scans. The durations at the cathodic and anodic vertices are 10 and 5 s, respectively. After this process, positively charged Au- and chitosan-containing complexes were produced in the solution. Then the solution was heated from room temperature to boiling at a heating rate of 6 °C minâ1 to prepare Au nanoparticles. The particle sizes of prepared Au (1 1 1) nanoparticles are ca. 10 nm. Moreover, the prepared Au nanoparticles in solutions are capable for anti-oxidation and stable in an ambient atmosphere for at least three months.
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Authors
Chung-Chin Yu, Yu-Chuan Liu, Kuang-Hsuan Yang, Chia-Ching Li, Cheng-Cai Wang,