volume | PIER Journals

Abstract

Layered molybdenum disulphide (MoS₂) can efficiently emit photoluminescence (PL) excited by visible light. However, one-photon PL of MoS₂ for bioimaging purposes suffers from strong autofluorescence and ion-induced PL quenching. Herein, we report single layer chitosan decorated MoS₂ nanosheets as nonbleaching and nonblinking optical nanoprobes under near infrared femtosecond laser excitation and their applications for two photon luminescence (TPL) and second harmonic generation (SHG) bioimaging. The TPL can resist the ion-induced quenching by the cellular membrane. The proposed TPL and SHG of singlelayer MoS₂ show great potential for real-time, deep and multiphoton bioimaging.

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Dr. Qiuqiang Zhan

Dr. Xin Zhang

Dr. Baoju Wang

Dr. Nana Li

Prof. Sailing He