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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhengbo Sun
  • Hanhan Xie
  • Siying Tang
  • Xue-Feng Yu
  • Zhinan Guo
  • Jundong Shao
  • Han Zhang
  • Hao Huang
  • Huaiyu Wang

Detail(s)

Original languageEnglish
Pages (from-to)11526-11530
Journal / PublicationAngewandte Chemie - International Edition
Volume54
Issue number39
Online published21 Aug 2015
Publication statusPublished - 21 Sep 2015

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 2.6nm and a thickness of about 1.5nm, the ultrasmall BPQDs exhibited an excellent NIR photothermal performance with a large extinction coefficient of 14.8 Lg-1cm-1 at 808nm, 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. A liquid exfoliation method based on a combination of probe sonication and bath sonication was adopted to synthesize black phosphorus quantum dots (BPQDs). These displayed a high extinction coefficient of 14.8Lg-1 cm-1, a photothermal conversion efficiency of 28.4 %, and good biocompatibility, and can thus be used as highly effective photothermal agents .

Research Area(s)

  • black phosphorus, nanocrystals, photothermal agents, photothermal therapy, quantum dots

Citation Format(s)

Ultrasmall Black Phosphorus Quantum Dots : Synthesis and Use as Photothermal Agents. / Sun, Zhengbo; Xie, Hanhan; Tang, Siying; Yu, Xue-Feng; Guo, Zhinan; Shao, Jundong; Zhang, Han; Huang, Hao; Wang, Huaiyu; Chu, Paul K.

In: Angewandte Chemie - International Edition, Vol. 54, No. 39, 21.09.2015, p. 11526-11530.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review