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篇目详细内容 |
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【篇名】 |
A facile synthesis of branched silver nanowire structures and its applications in surface-enhanced Raman scattering |
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【刊名】 |
Frontiers of Physics |
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【刊名缩写】 |
Front. Phys |
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【ISSN】 |
2095-0462 |
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【EISSN】 |
2095-0470 |
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【DOI】 |
10.1007/s11467-012-0255-y |
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【出版社】 |
Higher Education Press and Springer-Verlag BerlinHeidelberg |
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【出版年】 |
2012 |
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【卷期】 |
7
卷5期 |
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【页码】 |
521-526
页,共
6
页 |
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【作者】 |
Feng-Zi Cong;
Hong Wei;
Xiao-Rui Tian;
Hong-Xing Xu;
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【关键词】 |
branched silver nanowire; surface-enhanced Raman scattering (SERS) |
【摘要】 |
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We report a facile method of preparing novel branched silvernanowire structures such as Y-shaped, K-shaped and other multi-branchednanowires. These branched nanostructures are synthesized by reducingsilver nitrate (AgNO3) in polyethylene glycol(PEG) with polyvinglpyrrolidone (PVP) as capping agent. Statisticaldata indicate that for the “y” typed branched nanowire,the branches grow out from the side of the trunk nanowire in a preferentialorientation with an angle of 55？ between the branch and the trunk.Transmission electron microscopy (TEM) studies indicate that the defectson silver nanowires could support the growth of branched nanowires.Conditions such as the molar ratio of PVP/AgNO3, the reaction temperature, and the degree of polymerization of reducingagent and PVP play important roles in determining the yield of thesilver branches. Due to the rough surface, these branched nanostructurescan be used as efficient substrates for surface-enhanced Raman scatteringapplications. |
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