https://scholars.lib.ntu.edu.tw/handle/123456789/147753
標題: | 奈米粒子為基礎之光增強表面電漿共振感測器 Optical Enhanced Nanoparticle-Based Surface Plasmon Resonance Sensor |
作者: | 羅雅鈴 Lo, Ya-Ling |
關鍵字: | 金奈米粒子;表面電漿共振;surface plasmon resonance;gold nanoparticle;nanoro | 公開日期: | 2004 | 摘要: | Nanotechnology is the most attractive term in science literature. And the noble metal nanoparticles which has size- and shape-dependent properties has promoted a great deal of excitement during the last decades. These nanostructure materials have potential in many areas such as biological detection, drug delivery system, low threshold lasers, sensors and optical filters. In this thesis, we utilize the Kretschmann configuration surface plasmon resonance to investigate the optical properties of two types of nanoparticles, the rod- and sphere-shaped nanoparticles with four different sizes of nanosphere and four different absorption wavelengths of nanorods. The nanoparticles are deposited on the gold substrate with self-assembly technique. The ellipsometry method is utilized for the measurements of the optical constants of the nanosphere layer. Furthermore, the nanorods are employed for the testing of bio-sensitivity with ALV virus and IgG antibody. The nanosphere layer exhibits the size-dependent FWHM and reflectance of the surface plasmon resonance dip. The nanorods display a narrower SPR dip than the nanosphere. These are partly related to the nanoparticle behaviors of scattering spectra. The depositions of nanoparticle enhance the optical field in the vicinity of the particle and form a strong perturbation of the electromagnetic filed. Thus this phenomenon greatly influences the variation of the refractive index. We utilize the mechanism to amplify the SPR signal and can detect the concentration of antigen down to 6x10^-13 g/mL so far. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/53081 | 其他識別: | en-US |
顯示於: | 電機工程學系 |
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ntu-93-R91921094-1.pdf | 23.31 kB | Adobe PDF | 檢視/開啟 |
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