Citation: WU Xin-Zhou, PEI Mei-Shan, WANG Lu-Yan, LI Xiao-Nan, TAO Xu-Tang. Synthesis, Formation Mechanism and Surface-Enhanced Raman Scattering Properties of Silver Tangled Nanowires and Dendritic Structures[J]. Acta Physico-Chimica Sinica, ;2010, 26(11): 3095-3100. doi: 10.3866/PKU.WHXB20101132 shu

Synthesis, Formation Mechanism and Surface-Enhanced Raman Scattering Properties of Silver Tangled Nanowires and Dendritic Structures

1.
1. Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China;
2. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China

Received Date: 21 April 2010
Available Online: 14 October 2010
Fund Project: 国家自然科学基金(50872042, 51003040) (50872042, 51003040) 晶体材料国家重点实验室(山东大学)开放课题(KF0802) (山东大学)开放课题(KF0802)山东省博士后创新项目专项资金 (200703075)资助 (200703075)

Silver tangled nanowires and dendritic structures were readily synthesized in high yield by reducing silver nitrate with different concentrations of ascorbic acid in a polyacrylamide (PAM) aqueous solution at mild conditions (normal temperature and pressure). The structures obtained all have tangled morphology, which is different from the silver nanowires reported previously. The structures of the obtained sliver structures were investigated using transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman spectroscopy, and UV-Vis spectroscopy. PAM plays a key role in the formation of these anisotropic nanostructures as the capping agent and as a soft template. During the initial stage, silver nuclei are formed and PAM molecules simultaneously adsorb on their surfaces. Then, small silver particles will collide with each other along the polymer chains leading to the formation of tangled structures. Additionally, a too high concentration of ascorbic acid is unfavorable for the growth of tangled silver nanowires, and dendritic structures are formed. The surface-enhanced Raman scattering (SERS) activity was investigated using p-aminothiophenol (PATP) as a probe molecule. The silver tangled nanowires and dendritic structures show efficient surface enhanced Raman scattering property.
- Silver,
- Tangled,
- Nanowire,
- Dendritic,
- Surface-enhanced Raman scattering
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