Characterizing Optical Properties of Self-Assembled Gold Nanoparticles for Surface Plasmon Resonance Device Applications
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概要
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In this study, the optical constants of gold nanoparticles are evaluated for surface plasmon-based sensor applications. Using an effective medium approximation (EMA) and ellipsometry, approaches to monitor the self-assembly of gold nanoparticles are also demonstrated. Spectroscopic ellipsometric parameters measured $(\tan\Psi, \cos\Delta)$ before and after adding gold nanoparticles to a substrate are used to calculate the optical constants of gold nanoparticles. The film thickness is measured by grazing incidence X-ray reflectivity (XRR). The optical constants (refractive index, extinction coefficient) of gold nanoparticles can be obtained from the measured ellipsometric parameters and thickness. We also show that particles density can be well predicted and detected nondestructively by this method.
- 2006-09-15
著者
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Chu Tien-chi
Yuanpei Institute Of Science And Technology
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CHENG Hsu-Chun
National Nano Device Lab.
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Ko Tsung-shine
National Nano Device Laboratry
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CHUANG Shang-Yu
Department of Materials Science and Engineering, National Taiwan University
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Chen Hsuen-Li
Department of Electronics Engineering and Institute of Electronics, National Chiao-Tung University
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Chu Tien-Chi
Yuanpei Institute of Science and Technology, Hsinchu, Taiwan, R.O.C.
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Chuang Shang-Yu
Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.
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Cheng Hsu-Chun
National Nano Device Laboratry, Hsinchu, Taiwan, R.O.C.
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Ko Tsung-Shine
National Nano Device Laboratry, Hsinchu, Taiwan, R.O.C.
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