基于金属-介电-碳纳米管纳线的表面增强拉曼光谱法用于飞摩尔级化学检测。
Metal-dielectric-CNT nanowires for femtomolar chemical detection by surface enhanced Raman spectroscopy.
机构信息
Institute of Energy Technology, Department of Mechanical and Process Engineering, ETH Zürich, Zürich, Switzerland.
出版信息
Adv Mater. 2013 Aug 27;25(32):4431-6. doi: 10.1002/adma.201300571. Epub 2013 May 21.
PMID:23696098
Abstract
A highly sensitive substrate for surface enhanced Raman spectroscopy (SERS) is formed by arrays of gold-coated metallic carbon nanotubes having a nanoinsert of high-k dielectric (hafnia) as an energy coupling barrier. Repeated femtomolar detection of 1,2 bis-(4-pyridyl)-ethylene in solution demonstrates the critical contribution of this plasmonic energy coupling barrier to the enhanced chemical sensitivity.
摘要
一种用于表面增强拉曼光谱（SERS）的高灵敏度衬底是由具有高介电常数（氧化铪）纳米插入物的金涂覆金属碳纳米管阵列形成的，作为能量耦合势垒。在溶液中对 1,2-双（4-吡啶基）乙烯的重复皮摩尔检测证明了这种等离子体能量耦合势垒对增强化学灵敏度的关键贡献。
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