Fluorescent MoS2 Quantum Dots: Ultrasonic Preparation, Up-Conversion and Down-Conversion Bioimaging, and Photodynamic Therapy

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• 作者：Haifeng Dong ; Songsong Tang ; Yansong Hao ; Haizhu Yu ; Wenhao Dai ; Guifeng Zhao ; Yu Cao ; Huiting Lu ; Xueji Zhang ; Huangxian Ju
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 10, 2016
• 年：2016
• 卷：8
• 期：5
• 页码：3107-3114
• 全文大小：589K
• ISSN：1944-8252

文摘

Small size molybdenum disulfide (MoS₂) quantum dots (QDs) with desired optical properties were controllably synthesized by using tetrabutylammonium-assisted ultrasonication of multilayered MoS₂ powder via OH-mediated chain-like Mo–S bond cleavage mode. The tunable up-bottom approach of precise fabrication of MoS₂ QDs finally enables detailed experimental investigations of their optical properties. The synthesized MoS₂ QDs present good down-conversion photoluminescence behaviors and exhibit remarkable up-conversion photoluminescence for bioimaging. The mechanism of the emerging photoluminescence was investigated. Furthermore, superior ¹O₂ production ability of MoS₂ QDs to commercial photosensitizer PpIX was demonstrated, which has great potential application for photodynamic therapy. These early affording results of tunable synthesis of MoS₂ QDs with desired photo properties can lead to application in fields of biomedical and optoelectronics.