啞鈴形二氧化矽/金核殼顆粒製備與其性質研究

Preparation and Properties of Dummbell SiO2/Au Core-shell Particles

羅子鈞(Zi-Jun Luo)

指導教授 ： 許克瀛

中原大學/工學院/化學工程研究所/碩士(2015年)

https://doi.org/10.6840/cycu201500523

摘要

本研究以三乙氧基乙烯基矽烷為前驅物，利用溶膠凝膠法製備出含乙烯基的二氧化矽顆粒。並以此顆粒作為粒種，利用自由基反應法，合成出啞鈴形及線形二氧化矽顆粒。再以此顆粒作為基材，以晶種生長法製備出啞鈴形二氧化矽/金核殼顆粒。在不同濃度、金鹽溶液量、反應時間、表面改質劑種類與濃度下，尋求出最佳製備條件，以獲得高產率啞鈴形二氧化矽/金核殼顆粒，並探討其光熱性質。
　　由實驗結果顯示，製備的啞鈴形二氧化矽/金核殼顆粒藉由紫外光-可見光光譜儀檢測出在近紅外光(600nm)有隆起寬廣的吸收峰，經660nm雷射照射後，溫度明顯的上升，證實此材料具有良好的光熱轉換效果。

關鍵字

溶膠凝膠法 ； 自由基聚合 ； 啞鈴形顆粒 ； 核殼顆粒

並列摘要

In this study, silica particles containing vinyl group were prepared by vinyl triethoxysilane, as precursor, by sol-gel method. Dumbbell and linear silica particles were synthesized by the above obtained aspherical particles as seeds by using free radical polymerization. Then, silica@gold core–shell particles were prepared by seed and grow method. In order to investigate the effect on particles morphology, the reaction conditions were changed, such as, gold concentration, the amount of growth solutions, reaction time, different kind of surface modification agent and surface modification agent concentration. The reaction condition of higher yield linear silica@gold core–shell particles can be found. Photothermal properties of these particles also be measured.

　From the observation of the UV-Vis spectra, there was a wide range SPR peak located at 600nm, the dumbbell silica@gold particles were irradiated by 660nm laser, it efficiently convert 660 nm laser into heat, and have stable photothermal property.

並列關鍵字

Sol-gel method ； Free radical polymerization ； Dummbell particles ； Core-shell particles

參考文獻

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