[1]邱琦,李迎建,吕维忠,等.表面处理对反相微乳液中II-VI族量子点的影响[J].深圳大学学报理工版,2011,28(No.1(001-095)):41-46.
 QIU Qi,LI Yin-jian,LU Wei-zhong,et al.Impact of surface passivation and modification on II-VI QDs recovered from reverse micelle template[J].Journal of Shenzhen University Science and Engineering,2011,28(No.1(001-095)):41-46.
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表面处理对反相微乳液中II-VI族量子点的影响()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第28卷
期数:
2011年No.1(001-095)
页码:
41-46
栏目:
化学与化工
出版日期:
2011-01-10

文章信息/Info

Title:
Impact of surface passivation and modification on II-VI QDs recovered from reverse micelle template
文章编号:
1000-2618(2011)01-0041-06
作者:
邱琦12李迎建1吕维忠1罗仲宽1
1) 深圳大学化学与化工学院,深圳 518060
2) 浙江大学硅材料国家重点实验室,杭州 310027
Author(s):
QIU Qi12LI Yin-jian1LU Wei-zhong1and LUO Zhong-kuan1
1)College of Chemistry and Chemical Engineering,Shenzhen University,Shenzhen 518060,P.R.China
2)State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou 310027,P.R.China
关键词:
分离与提纯量子点光致发光反相微乳液嵌段聚合物过渡金属掺杂表面修饰表面钝化
Keywords:
isolation and purificationquantum dots photoluminescence reverse micelle template block copolymers transition metal doping surface modification surface passivation
分类号:
O 6-332
文献标志码:
A
摘要:
以对二甲苯为连续相,水为分散相,聚(氧乙烯)-聚(氧丙烯)-聚(氧乙烯)嵌段聚合物为表面活性剂,制备ZnSe和ZnMnSe量子点.在量子点表面覆盖一层Zn(OH)2使其发生钝化,再加水引起相分离,选择合适的有机溶剂可从反相微乳液中成功分离出上述量子点,分离后的量子点保持荧光特性且量子点荧光有显著增强.经11-巯基十一烷酸表面修饰,分离的量子点可分散在水中形成透明溶液.采用X-射线衍射、透射电镜、动态激光光散射和荧光光度计表征晶体结构、形貌、尺寸分布和荧光特性,讨论了使量子点稳定的表面保护机理.研究结果表明,嵌段聚合物分子吸附在量子点表面,阻碍了其氧化进程,表面钝化可修补晶体部分缺陷,使分离的量子点荧光增强,稳定期达数月之久.
Abstract:
The successful extractions of ZnMnSe as well as ZnSe quantum dots (QDs) from a reverse micelle template were reported.The recovered QDs kept their functionality with distinct enhancement in photoluminescence.After being coated with a possible layer of Zn(OH)2 within the template,the QDs were extracted from the template by adding water to induce phase transition and employing specific organic solvent.Thereafter,the extracted QDs were capped with mercapto-undecanoic acid for dispersion in water to render crystal clear solution.Analytical techniques such as X-ray diffraction,transmission electron microscopy,dynamic light scattering,and fluorometer were employed to characterize the crystal structure,morphology,average particle size,and photoluminescence of the samples.The mechanism of the surface protection towards QDs was investigated and discussed.A mechanism was proposed as block copolymer molecular being adsorbed to the QDs surface that retards the oxidation process of QDs during the extraction.Consequently,the extracted QDs demonstrated invariable photoluminescence and consistent stability for months.

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备注/Memo

备注/Memo:
收稿日期:2010-03-24;修回日期:2010-09-19
基金项目:广东省自然科学基金资助项目(2008227);浙江大学硅材料国家重点实验室访问学者基金资助项目(SKL2010-17)
作者简介:邱琦(1976-),女(汉族),江苏省宜兴市人,深圳大学讲师、博士.E-mail:chwchi@gmail.com
通讯作者:罗仲宽(1962-),男(汉族),深圳大学教授.E-mail:luozhongkuan@126.com
更新日期/Last Update: 2011-01-13