Effcet of Reductant on the Silver Nanoparticle

• Main Author: 林聖玉
• Other Authors: 張聰慧
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/14443250060458465088

碩士 === 明新科技大學 === 化學工程與材料科技研究所 === 100 === This study used wet chemical reduction to investigate size variation of colloid silver nanoparticle by changing reducing agent (NaBH4, glucose and sodium citrate) and modulating PVP/AgNO3 ratio, respectively. The experimental results show that the colloid silver nanoparticles with diameter of 20 nm were synthesized by adding 0.75 mM reducing agent into PVP/AgNO3=0.16 compositions. The size of AgNPs increased with increasing or decreasing concentration of reducing agent and ratio of PVP to AgNO3. Furthermore, sheet resistance of colloid AgNPs dried on glass substrate during heating 100℃ for 10 min. exhibits a sharp decrease when decreasing PVP/AgNO3. This could attribute to the insulated PVP against electronic transport. In addition, reducing agents of glucose and sodium citrate also were employed to synthesize colloid silver nanopatricles, respectively. The results show that the trend of size and conductivity is same with using NaBH4 as reducing agent. In summary, this study has demonstrated a method for manufacturing colloid silver nanoparticles without heating. It is simple and easy to control the particle diameter by modulating concentration of reducing agent and PVP/AgNO3 ratio and can be used as fillers of injet ink.