高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 208.

• Chemistry in Materials Sciences • 上一篇    下一篇

Preparation of Gold Nanorods by Electrolysis:Electrochemical Reduction or Chemical Reduction?

QI Hang, ZHENG Jie-Ru, ZHU Tao, LIU Zhong-Fan   

  1. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871
  • 出版日期:2000-12-31 发布日期:2000-12-31
  • 基金资助:

    This work is supported by the National Natural Science Foundation of China (No. 29803002)

Preparation of Gold Nanorods by Electrolysis:Electrochemical Reduction or Chemical Reduction?

QI Hang, ZHENG Jie-Ru, ZHU Tao, LIU Zhong-Fan   

  1. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871
  • Online:2000-12-31 Published:2000-12-31
  • Supported by:

    This work is supported by the National Natural Science Foundation of China (No. 29803002)

摘要:

In the synthesis of nanosized materials, to control the particle shape is as important as to control its size, because the properties of the nanoparticles strongly depend on both size and shape. The properties of Au nanorods are different from its spherical counterparts in some ways due to the geometric anisotropy. For example, there are two surface plasmon resonance (SP) peaks in the UV-Vis region for Au nanorods, namely, the transverse (SPt) peak and the longitudinal (SP1) peak, respectively, while only one for spherical nanoparticles. Recently, Wang et al.[1,2] proposed an electrolysis-based method to produce Au nanorods with high throughput for the first time, and it was successfully adopted by El-Sayed et al.[3,4] in their studies on the optical properties and the thermal/laser induced shape transition of gold nanorods. However, the detailed growth mechanism of Au nanorods in such an approach remains untouched at present stage. To this point, only an ambiguous statement is available in Wang's paper[1,2] as that "the gold nanorods were converted from the bulk anode most likely at the interfacial region of the cathodic surface and within the electrolytic solution",it is still unclear whether the gold nanorods are formed electrochemically or chemically.

Abstract:

In the synthesis of nanosized materials, to control the particle shape is as important as to control its size, because the properties of the nanoparticles strongly depend on both size and shape. The properties of Au nanorods are different from its spherical counterparts in some ways due to the geometric anisotropy. For example, there are two surface plasmon resonance (SP) peaks in the UV-Vis region for Au nanorods, namely, the transverse (SPt) peak and the longitudinal (SP1) peak, respectively, while only one for spherical nanoparticles. Recently, Wang et al.[1,2] proposed an electrolysis-based method to produce Au nanorods with high throughput for the first time, and it was successfully adopted by El-Sayed et al.[3,4] in their studies on the optical properties and the thermal/laser induced shape transition of gold nanorods. However, the detailed growth mechanism of Au nanorods in such an approach remains untouched at present stage. To this point, only an ambiguous statement is available in Wang's paper[1,2] as that "the gold nanorods were converted from the bulk anode most likely at the interfacial region of the cathodic surface and within the electrolytic solution",it is still unclear whether the gold nanorods are formed electrochemically or chemically.

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