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yetaieva

铁杆木虫 (著名写手)

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专业: 光谱分析

[交流] 【求助】油相量子点包裹二氧化硅已有1人参与

在油相中合成了CdSe/ZnS量子点，由于氯仿太毒，实验室的离心机转速只有4000
采用了曲拉通X-100和环己烷条件下将量子点原液直接加入，然后加入TEOS和氨水催化，结果得到的物质荧光基本上没有了，，，请问这个是什么原因？
难道是因为量子点没有纯化或者没有使用氯仿的原因么？做了好几次了都没成功，麻烦高人指点谢谢

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1楼2010-08-20 12:57:44

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fxwjg

木虫 (正式写手)

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yetaieva(金币+1):谢谢参与

看看下面的文献是否有帮助？
Highly Fluorescent CdTe@SiO2 Particles Prepared via Reverse Microemulsion Method
Lihong Jing, Chunhui Yang, Ruirui Qiao, Mu Niu, Meihong Du, Dayang Wang and Mingyuan Gao
Chem. Mater., 2010, 22 (2), pp 420–427

Coating Aqueous Quantum Dots with Silica via Reverse Microemulsion Method: Toward Size-Controllable and Robust Fluorescent Nanoparticles
Yunhua Yang, Lihong Jing, Xiaolan Yu, Dadong Yan, and Mingyuan Gao
Chem. Mater., 2007, 19 (17), pp 4123–4128

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2楼2010-08-20 13:16:24

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yetaieva

铁杆木虫 (著名写手)

应助: 66 (初中生)
金币: 7564
散金: 1638
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注册: 2009-05-10
专业: 光谱分析

引用回帖:

Originally posted by fxwjg at 2010-08-20 13:16:24:
看看下面的文献是否有帮助？
Highly Fluorescent CdTe@SiO2 Particles Prepared via Reverse Microemulsion Method
Lihong Jing, Chunhui Yang, Ruirui Qiao, Mu Niu, Meihong Du, Dayang Wang and Mingyuan Ga ...

这两篇文献我都有，他们都是水相量子点包裹的，我这个是油相得这会造成影响么？

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3楼2010-08-20 13:32:14

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zbbqds

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★
yetaieva(金币+1):谢谢参与
yetaieva(金币+3):非常感谢贵课题组的工作，给了我很大的提示。另外文中的NP-40我可以用曲拉通X-100或者吐温20替代么？谢谢 2010-08-20 20:07:40

楼主的经历我有，我对这个问题做了详细工作，请看我们发表的工作：
http://iopscience.iop.org/0957-4484/19/46/465604

In this paper, based on selecting the appropriate type of quantum dots (QDs), a novel method is developed to enhance the quantum yield (QY) of silica-coated QD nanoparticles (SQDNPs). The effect of varying types of QDs on the QY after silica encapsulation is systematically studied. The results show that QDs with appropriate structure and composition of shells can much better retain the initial QY after silanization. The seven-layered shell/core QDs with QY of 47.8% nearly completely retain the original QY and is the best type among six types of QDs for silica modification. In the aspect of shell composition, the CdS plays an important role for QY retention since the lattice mismatch between CdSe and CdS is lower than that of CdSe and ZnS. After the appropriate type of QDs is chosen for silica coating, the highly fluorescent SQDNPs are chemically modified with amine, thiol and carboxyl groups, and then labeled by antibodies for particle-based immunofluorescence assay. The results indicate that the SQDNPs–antibody bioconjugates are alternative fluorescent probes useful for biodetection.

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4楼2010-08-20 19:35:33

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