Galvanic replacement mediated growth of dendritic gold nanostructures with a three-fold symmetry and their applications to SERS

被引：28
作者：
Bai, Xiangtao [1 ]
Gao, Yanan [1 ]
Zheng, Liqiang [1 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China
来源：
CRYSTENGCOMM | 2011年 / 13卷 / 10期
基金：
中国国家自然科学基金;
关键词：
NANOPARTICLES; AG; NANOCRYSTALS; SURFACTANT; HOLLOW; AU; TRANSFORMATION; ENHANCEMENT; FABRICATION; MORPHOLOGY;
D O I：
10.1039/c1ce05084b
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Hierarchical, three-fold symmetrical, single-crystalline gold dendrites are synthesized on different metal substrates including Al, Zn, and Ni in a mixture of ethanol and water with the assistance of an ionic liquid. Structural characterizations suggest that the obtained gold dendrites are grown along the < 211 > directions. Such < 211 >-oriented gold dendrites are seldom reported. Both the metal substrate and the volume ratio of ethanol and water have demonstrated a significant effect on the dendrite morphologies. The obtained gold dendrites are found to yield large SERS enhancement factors for rhodamine 6G (R6G) and the morphology of the branches is a key for the enhancement.
引用
收藏
页码：3562 / 3568
页数：7
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