量子點電激發化學發光研究

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题名:	量子點電激發化學發光研究
其它题名:	Studies on Quantum Dots-Based Electrochemiluminescence
作者:	黃承文
贡献者:	行政院國家科學委員會東海大學化學系
关键词:	量子點；電激發化學發光；導電高分子；碳奈米管；複合式電極 quantum dots ；electrochemiluminescence；conductive polymer；carbon nanotubes ；
日期:	2010
上传时间:	2012-04-27T03:03:04Z (UTC)
摘要:	無機半導體奈米晶體，即一般通稱的量子點（quantum dots; QDs），是近年來一個熱門的研究主題，特別是在光電顯示及生物標示領域。QDs 屬於膠體微粒，具有特殊的光吸收與放射特性，包括：寬廣的激發（或吸收）頻寬，高莫爾吸光係數，狹窄對稱的螢光放射頻寬，且放射波長位置可藉控制膠體顆粒大小自紫外光至近紅外光範圍內隨意調整。QDs 的光放射除了可利用光子激發外，也可以藉電化學激發方式在QDs 上產生電子-電洞對而放光（electrochemiluminescence; ECL）。水溶液中QDs 的ECL 研究近年開始受到重視，陰極（cathodic）與陽極（anodic）ECL 現象均有文獻報導。本計畫擬探討固定於導電高分子薄膜中QDs 的電化學與ECL 行為，將分三年執行：第一年合成表面正電性的CdSe/CdS QDs，固定於負電性Nafion 高分子內製成薄膜電極，再探討其電化學與ECL 表現；第二年合成表面負電性的CdTe/CdS QDs，固定於正電性poly(4-vinylpyridinium) 高分子內製成薄膜電極，再探討其電化學與ECL 表現；第三年則擬製作並探討碳奈米管/QDs/polymer 複合電極的電化學與ECL 行為。 In recent years, semiconductor nanocrystals, or quantum dots (QDs), with excellent luminescent properties have attracted increased attention, particularly in the fields of optical imaging and biolabeling. QDs are colloidal particles which have very unique photoluminescence characteristics, such as broad excitation bandwidth, high molar absorptivity, narrow Gaussion emission peak, and tunable emission positions from UV to NIR by changing the colloidal particle size. Luminescence of QDs can be generated not only by photonic excitation, but also by electrochemical methods. Recently, electrochemiluminescence (ECL) of QDs in aqueous solution has initiated considerable interests. Both cathodic and anodic ECL of QDs has been reported in the literature. In this three-year research, we intend to study the electrochemical and ECL behavior of QDs immobilized in various conductive polymers. In the first year, CdSe/CdS QDs modified with a cationic ligand will be immobilized in a thin layer of an anionic Nafion polymer, and the electrochemistry and ECL of this QDs/polymer electrode will be investigated. In the second year, CdTe/CdS QDs modified with an anionic ligand will be immobilized in a thin layer of a cationic poly(4-vinylpyridinium) polymer, and the electrochemistry and ECL of this QDs/polymer electrode will be examined. In the third year, carbon nanotubes will be mixed with QDs/polymer to form a composite electrode, and the influence of carbon nanotubes on the electrochemistry and ECL of QDs/polymer electrode will be studied.
關聯:	研究編號：NSC97-2113-M029-007-MY3 研究期間：2010-08~ 2011-07
显示于类别:	[化學系所] 國科會研究報告

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