利用濕式環境穿透式電子顯微鏡臨場觀測二氧化鈦負載白金之光催化反應

本研究論文欲發展臨場光誘發分析技術於電子顯微鏡中，因其顯微術光源為高能電子束，腔體需保持一高真空之環境下，因此造成欲分析樣品受到限制，故此研究中利用本實驗室所發展的微型化濕室環境腔體，將液體樣品封裝於微型環境腔體內，進而能於穿透式電子顯微鏡中觀測液態樣品之反應過程。再搭載光纖導入光束系統裝置於JEM-2010穿透式電子顯微鏡腔體中，進行奈米尺度下臨場光誘發反應之觀測，並使用自行設計之光強度偵測器，分析在特定光強度值下光誘發反應之機制。本論文研究已成功發展臨場觀測光誘發反應之系統，並且能夠隨時更換不同波長之光源，以便應用於不同的光誘發反應中。此外，在欲觀測之光誘發沉積反應部分，已於光學顯微鏡與電子顯微鏡中，觀察到反應前後影像的變化與差異，並搭配Ｘ光微區分析與元素分析圖譜進行定性分析。在光誘發產氣反映部分，除在光學顯微鏡下臨場觀測到反應，也已成功應用所開發之光源系統搭載電子顯微術，得到其臨場反應之影像。

關鍵字

穿透式電子顯微鏡；臨場光誘發分析；微型化濕室環境腔體；光纖導入光束系統

並列摘要

In this study, we design a “fiber-based system” which is using a UV light source with optical fiber to induce UV light through the EDS pole for JEM-2010. Because the TEM chamber must maintain at ultra-high vacuum environment, the sample can only in solid state. In order to observe wet sample in TEM, we use the wet-cell which is designed by our laboratory to prepare samples. Combine the fiber-based system with wet-cell technology let us having the chance to in-situ observes the photo-induced catalysis reaction in EM under nano-scale. We can confirm that the light-induced reaction is actually occurred under OM and TEM by the in-situ movies, difference in the images and the EDS analysis. The result makes sure that our home-make light induced system for TEM is workable.

並列關鍵字

electron microscope ； in situ light-induced analysis ； wet cell ； fiber-based system

參考文獻

[1] D. F. Parsons et al., “Structure of Wet Specimens in Electron Microscopy”, Science, 186,1974, 407.

[2] R T K Baker and P. S .Harris, “Controlled atmosphere electron microscopy Scientific Instruments”, 8, 1972, 793.

[3] Fujiyoshi et al., “Specimen-holding device for electron microscope”, U.S. Patent 5406087,1995.

[4] Danilatos GD and PL Gai, ed. ,“Environmental Scanning Electron Microscopy. In-Situ Microscopy in Materials Research”, Kluwer Academic Publishers, Dordrecht, 1997, 14–44.

[5] Matthew H. Ervin et al., “A Simple Low-Vacuum Environmental Cell.”, Microscopy and Microanalysis, 9, 2003, 18–28.

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利用濕式環境穿透式電子顯微鏡臨場觀測二氧化鈦負載白金之光催化反應

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