Switchable photoluminescence of CdTe nanocrystals by temperature-responsive microgels

被引：76

作者：

Agrawal, M. ^{[1
]}

Rubio-Retama, J. ^{[1
]}

Zafeiropoulos, N. E. ^{[1
]}

Gaponik, N. ^{[3
]}

Gupta, S. ^{[1
]}

Cimrova, V. ^{[2
]}

Lesnyak, V. ^{[3
]}

Lopez-Cabarcos, E. ^{[4
]}

Tzavalas, S. ^{[1
]}

Rojas-Reyna, R. ^{[1
]}

Eychmueller, A. ^{[3
]}

Stamm, M. ^{[1
]}

机构：

[1] Leibniz Inst Polymerforsch Dresden eV, D-01069 Dresden, Germany

[2] Acad Sci Czech Republ, Inst Macromol Chem, CR-16206 Prague 6, Czech Republic

[3] Tech Univ Dresden, D-01062 Dresden, Germany

[4] Univ Complutense Madrid, Fac Pharm, Dept Phys Chem, E-28040 Madrid, Spain

来源：

LANGMUIR | 2008年 / 24卷 / 17期

关键词：

D O I：

10.1021/la801347d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the present study, we report a method for preparing a fluorescent thermosensitive hybrid material based on monodisperse, thermosensitive poly(N-isopropyl acrylamide) (PNIPAM) microgels covered with CdTe nanocrystals of 3.2 nm diameter. The CdTe nanocrystals were covalently immobilized on the surface of PNIPAM microgels. The chemical environment around the CdTe nanocrystals was modified by changing the temperature and inducing the microgel volume-phase transition. This change provoked a steep variation in the nanocrystal photoluminescence (PL) intensity in such a way that when the temperature was under the low critical solution temperature (LCST) of the polyrner (36 degrees C) the PL of the nanocrystals was strongly quenched, whereas above the LCST the PL intensity was restored.

引用

页码：9820 / 9824

页数：5

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