Precisely Controlled Fabrication of a Highly Sensitive Au Sensor Film for Surface Enhanced Spectroscopy
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概要
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We propose a new method of infrared (IR) monitored two-step wet-chemical preparation of plasmonic Au nanostructures with a high degree of surface enhanced infrared absorption (SEIRA) activity. Au nanoparticles (AuNP) are deposited on SiO2/Si substrate and grown to form a network of densely packed islands very close to the two-dimensional percolation threshold. Monitoring the growth process with IR spectroscopy enables the termination of growth at a well defined state of the film morphology and is a great advantage compared to the previous methods. An octadecanethiol (ODT) monolayer adsorbed on the SEIRA optimized film gives a huge absorption intensity of 16.5% for the antisymmetric CH2 stretching vibration.
- 2007-12-25
著者
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Nagao Tadaaki
Nano System Functionality Center National Institute For Materials Science:icorp Japan Science And Te
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Nakayama Tomonobu
Nano System Functionality Center National Institute For Materials Science:nanoscale Quantum Conducto
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Aono Masakazu
Nano System Functionality Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Enders Dominik
Nano System Functionality Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Nagao Tadaaki
Nano System Functionality Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Nakayama Tomonobu
Nano System Functionality Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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