有機及無機奈米材料之光學性質研究

Study on Optical Properties of Organic and Inorganic Nanomaterials

吳銘修(Ming-Xiu Wu)

指導教授 ： 許怡仁

中原大學/理學院/應用物理研究所/碩士(2006年)

https://doi.org/10.6840/cycu200600599

摘要

本文的目的在量測各種有機及無機奈米材料的螢光以及光的散射與吸收特性。在有機材料的部分，我們分別量測紅、綠螢光蛋白在-20℃到0℃之間的螢光光譜變化。實驗結果顯示紅螢光蛋白隨著溫度的降低會有光譜藍移(blue shift)的現象，而綠螢光蛋白則有隨溫度降低產生放射螢光強度減弱的趨勢。在無機材料的研究方面，利用米氏散射為理論基礎，於實驗上量測高分子聚合物(PMMA)的散射光強度隨著角度的變化情形，並進而求出尺寸參數以推得粒徑大小。另外，並經由改變環境的酸鹼度，即時量測奈米金粒子吸收光譜的變化情形。

關鍵字

光激螢光 ； 米氏散射 ； 螢光蛋白 ； 奈米粒子

並列摘要

The objective of this thesis is to measure the fluorescence, scattering and absorption properties of different organic and inorganic nanomaterials. In organic materials, we measured the spectra of red and green fluorescent proteins during the temperature range between -20℃and 0℃.We found that the spectra of red fluorescent proteins possess the phenomena of blue shifts when the temperature decreases, while the spectral intensity of green fluorescent protein decreases when the temperature decreases. In inorganic materials, we measured the intensities of light scattered by PMMA particles of 200 nm diameter with different angle. We estimated the particle size based on the Mie scattering theory. Furthermore, we also measured the variation of absorbed spectra of gold nanoparticals in real time as well as the pH value of the environment changed.

並列關鍵字

photoluminescence ； Mie scattering ； fluorescent protein ； nanoparticle

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