Sacrificial oxidation of a self-metal source for the rapid growth of metal oxides on quantum dots towards improving photostability

Chemical Science
Lu HuangLiang Li

Abstract

Growth of metal oxide layers on quantum dots (QDs) has been regarded as a good way to improve the photostability of QDs. However, direct growth of metal oxides on individual QD remains a great challenge. Here we report a novel approach to rapidly anchor metal oxides on QD surfaces through a sacrificial oxidation of a self-metal source strategy. As typical core/shell QDs, CdSe/CdS or aluminum doped CdSe/CdS (CdSe/CdS:Al) QDs were chosen and treated with peroxide (benzoyl peroxide). Self-metal sources (cadmium or/and aluminum) can be easily sacrificially oxidized, leading to the quick growth of cadmium oxide (CdO) or aluminum/cadmium hybrid oxides (Al2O3/CdO) on the surface of individual QD for improved photostability. Compared with CdO, Al2O3 possesses excellent barrier properties against moisture and oxygen. Therefore, CdSe/CdS QDs with the protection of an Al2O3/CdO hybrid layer show much superior photostability. Under strong illumination with blue light, the QDs coated with the Al2O3/CdO hybrid layer retained 100% of the original photoluminescence intensity after 70 h, while that of the untreated CdSe/CdS:Al, the treated CdSe/CdS and the CdSe/CdS QDs dropped to 65%, 45%, and 5%, respectively. Furthermore, we demonstrate that ...Continue Reading

References

Jan 11, 2000·Science·P MichlerA Imamoglu
Jul 8, 2005·Nature·Steven C ErwinDavid J Norris
Apr 6, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Y F GaoK Koumoto
Aug 10, 2006·Journal of the American Chemical Society·Lifang ShiZeev Rosenzweig
Sep 25, 2007·Nano Letters·Bhranti S ShahJeremy J Mao
Nov 21, 2012·Angewandte Chemie·Shinae Jun, Eunjoo Jang
May 27, 2014·Nature Materials·Chia-Hao M ChuangMoungi G Bawendi
Apr 22, 2015·ACS Applied Materials & Interfaces·Jason K CooperJin Z Zhang
May 4, 2015·Journal of Colloid and Interface Science·R SaravananA Stephen
Sep 22, 2015·Journal of the American Chemical Society·Zhichun LiLiang Li
Dec 13, 2016·Journal of the American Chemical Society·Hwea Yoon KimByeong-Soo Bae
Nov 8, 2017·Nature Nanotechnology·Pascale SenellartAndrew White

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Citations

Aug 5, 2021·Physical Chemistry Chemical Physics : PCCP·Ke XingJialong Zhao

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Methods Mentioned

BETA
X-ray

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