Starfruit-Shaped Gold Nanorods and Nanowires: Synthesis and SERS Characterization

被引：92
作者：
Vigderman, Leonid [1 ]
Zubarev, Eugene R. [1 ]
机构：
[1] Rice Univ, Dept Chem, Houston, TX 77005 USA
来源：
LANGMUIR | 2012年 / 28卷 / 24期
基金：
美国国家科学基金会;
关键词：
ENHANCED RAMAN-SCATTERING; SEED-MEDIATED SYNTHESIS; HIGH-YIELD SYNTHESIS; SURFACE; NANOPARTICLES; SPECTROSCOPY; GROWTH; NANOCRYSTALS; EVOLUTION; SILVER;
D O I：
10.1021/la300218z
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Recently, branched and star-shaped gold nanopartides have received significant attention for their unique optical and electronic properties, but most examples of such nanoparticles have a zero-dimensional shape with varying numbers of branches coming from a quasi-spherical core. This report details the first examples of higher-order penta-branched gold particles including rod-, wire-, and platelike particles which contain a uniquely periodic starfruitlike morphology. These nanoparticles are synthesized in the presence of silver ions by a seed-mediated approach based on utilizing highly purified pentahedrally twinned gold nanorods and nanowires as seed particles. The extent of the growth can be varied, leading to shifts in the plasmon resonances of the particles. In addition, the application of the starfruit rods for surface-enhanced Raman spectroscopy (SERS) is demonstrated.
引用
收藏
页码：9034 / 9040
页数：7
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