https://scholars.lib.ntu.edu.tw/handle/123456789/64960
標題: | 由嵌段共聚物製備CdS奈米粒子/高孔隙度倍半聚矽氧烷複合膜,及其微結構和光學特性探討(3/3) Synthesis of CdS Nanoparticle/ Porous Poly (Silsesquioxane) Composition Films via Block Copolymers, Their Characteristics of Microstructures and Optoelectronic Properties (3/3) |
作者: | 陳文章 | 關鍵字: | 原子轉移自由基聚合法;雙親性嵌 段共聚物;PS-b-PMSMA;PS-b-PMSMA/CdS 複合膜;ATRP;Amphiphilic block copolymer;Polystyrene-b-3-(trimethoxysilyl)- propyl methacrylate;CdS;Composite film | 公開日期: | 15-十一月-2005 | 出版社: | 臺北市:國立臺灣大學化學工程學系暨研究所 | 摘要: | 本研究中利用原子轉移自由基聚合法製 備不同分子量及鏈段長度之PS-b-PMSMA 嵌 段共聚物。GPC 結果顯示在適當的操作條件 下製備所得之PS-b-PMSMA 其分子量在 30,000 以下,其分子量分布可控制在1.3 以 下。另外,此雙親性之PS-b-PMSMA 嵌段共 聚物的化學結構亦由FTIR 及NMR 的分析結 果證實。SEM 圖可看出PS-b-PMSMA 嵌段共 聚物在油相溶劑中之微胞大小隨PS 及 PMSMA 鏈鍛大小而不同。XPS 、DES 及SCMS 分析亦證實CdS 粒子已成功被製備在 PS-b-PMSMA 的複合膜中。由TEM 及SEM 圖分析得知所製備複合膜結構為數百nm 之 compound micelle 中包含許多大小在4~6 nm 的小微胞(single micelle)。UV-Vis 及PL 的分 析結果則顯示本實驗中所得到的懸浮CdS 粒 子其最大吸收及發射波長隨CdS 粒徑大小增 加而有紅移的現象產生,且CdS 的顆粒大小 約為4-5 nm 。由本研究可知由雙親性嵌段共 聚物PS-b- PMSMA 可控制CdS 之成長粒徑並 形成compound micelle 中有single micelle 之 結構,並具發光特性,這將於多層結構之光 電複合薄膜將極具應用潛力。 In this study, block copolymers of PS-b-PMSMA with various molecular weight and block length were synthesized by atom transfer radical polymerization (ATRP). The GPC analysis showed that the molecular weight distribution of the prepared PS-b-PMSMA could be controlled to be lower than 1.3 for the molecular weight less than 30,000. The chemical structures of the amphiphilic block copolymers of PS-b-PMSMA were well identified by FTIR and NMR. The TEM and SEM images showed that the lengths of PS and PMSMA segments could control the size of micelles in solution or film. The morphology of the composite films exhibited as several hundred nm compound micelles contained a few 4-6 nm single micelles. The results of XPS 、 DES and SCMS analysis indicated that the nano-size CdS particles have been successfully prepared in the PS-b-PMSMA composite films. The UV-Vis and PL analysis also revealed that the λ max of prepared CdS particles were red-shift as the CdS particle size increased. Besides, the diameter of CdS particles estimated from Brus formula was about 4-5 nm. Our study demonstrated the successful preparation of CdS/polymer composite films with controllable structure within structure morphology, which would be potential used for multifunctional optoelectronic composite films. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/9432 | 其他識別: | 932218E002064 | Rights: | 國立臺灣大學化學工程學系暨研究所 |
顯示於: | 化學工程學系 |
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932218E002064.pdf | 10.01 MB | Adobe PDF | 檢視/開啟 |
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