Aligned silver nanorod arrays produce high sensitivity surface-enhanced Raman spectroscopy substrates
Aligned silver nanorod arrays produce high sensitivity surface-enhanced Raman spectroscopy substrates
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DOI：
10.1063/1.1988980
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发表时间：
2005-07-18
影响因子：
4
通讯作者：
Zhao, YP
中科院分区：
文献类型：
--
作者：
Chaney, SB;Shanmukh, S;Zhao, YP
由具有不规则表面晶格的银纳米棒阵列（即，随机的成核位置）并且具有变化的棒长度。这些阵列被评估为潜在的表面增强拉曼光谱（Sers）基板使用反式-1，2-双（4-吡啶基）乙烯作为报告的分子。Sers活性被证明取决于纳米棒的长度。平均长度为508.29 +/-44.86 nm，纵横比为5.69 +/-1.49的Ag纳米棒表现出大于10（8）的最大Sers增强因子。理论计算表明，这种大的Sers增强可以部分解释的形状，密度，和横向排列的银纳米棒阵列。(c)2005年美国物理学会。
Substrates consisting of silver nanorod arrays with an irregular surface lattice (i.e., random nucleation sites) and with varying rod lengths were fabricated by an oblique angle vapor deposition method. These arrays were evaluated as potential surface-enhanced Raman spectroscopy (SERS) substrates using trans-1,2-bis(4-pyridyl) ethene as a reported molecule. SERS activity was shown to depend upon the length of the nanorods. The Ag nanorods with average lengths of 508.29 +/- 44.86 nm, and having aspect ratios of 5.69 +/- 1.49 exhibited the maximum SERS enhancement factors of greater than 10(8). Theoretical calculations indicate that this large SERS enhancement may be partially explained by the shape, density, and lateral arrangement of the Ag nanorod arrays. (c) 2005 American Institute of Physics.