Preparation and Application of Metal Nanoparticles

• Main Authors: Sen-Fu Sheu, 許森富
• Other Authors: Yu-Chuan Liu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/58751931967833002557

碩士 === 萬能科技大學 === 工程科技研究所 === 96 === In this work, silver-containing nanoparticles on silver substrates and gold-containing nanocomplexes in solutions were prepared by electrochemical methods based on three-electrode system. The prepared gold-containing nanocomplexes were further reduced by sonoelectrochemical to synthesize gold nanoparticles. Then different concentrations of the synthesized gold nanoparticles were added in alcohol solutions to decompose aldehyde. After test for several days the effects of concentrations of gold nanoparticles on the decomposition of aldehyde were determined via instrumental analyses. The results indicate that the decomposition of aldehyde is increased with the increase of the addition of gold nanoparticles. In preparing silver-containing nanoparticles deposited on silver substrates, we tried to change the experimental conditions, including scan rates and cycles, electrolytes and anodic vertexes, used in the electrochemical triangular-wave oxidation-reduction cycles (ORC) to find out the optimum roughening conditions for obtaining strongest SERS. Based on this prepared substrate, the SERS of Rhodamine 6G (R6G) exhibits a higher intensity by one order of magnitude, as compared with that of R6G adsorbed on a generally prepared roughened Ag substrate. Moreover, the practical limit of detection (LOD) can be reduced by 6 orders of magnitude from 2 × 10-9 to 2 × 10-15 M.