Ultrasmall Black Phosphorus Quantum Dots: Synthesis and Use as Photothermal Agents

Angewandte Chemie - International Edition - Tập 54 Số 39 - Trang 11526-11530 - 2015
Zhengbo Sun1,2,3, Hanhan Xie1,3, Siying Tang1, Xue‐Feng Yu4,1,5,6, Zhinan Guo2, Jundong Shao2, Han Zhang4,5,2,6, Hao Huang7,1, Huaiyu Wang1, Paul K. Chu7,4,5,6
1Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 P. R. China
2SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060 (P. R. China)
3these authors contributed equally to this work
4Han Zhang, SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060 (P. R. China)
5Paul K. Chu, Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (P. R. China)
6Xue-Feng Yu, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055 (P. R. China)
7Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China

Tóm tắt

Abstract

Black phosphorus quantum dots (BPQDs) were synthesized using a liquid exfoliation method that combined probe sonication and bath sonication. With a lateral size of approximately 2.6 nm and a thickness of about 1.5 nm, the ultrasmall BPQDs exhibited an excellent NIR photothermal performance with a large extinction coefficient of 14.8 Lg−1 cm−1 at 808 nm, a photothermal conversion efficiency of 28.4 %, as well as good photostability. After PEG conjugation, the BPQDs showed enhanced stability in physiological medium, and there was no observable toxicity to different types of cells. NIR photoexcitation of the BPQDs in the presence of C6 and MCF7 cancer cells led to significant cell death, suggesting that the nanoparticles have large potential as photothermal agents.

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Angewandte Chemie - International Edition

Tập 54 Số 39

11526-11530

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