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Retracted: Single layer molybdenum disulfide as an optical nanoprobe for 2 photon luminescence and second harmonic generation cell imaging
Author(s) -
Zhong Hong,
Lu Lin,
Wang Yuanhao,
Yang Hongxing
Publication year - 2018
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.201700354
Subject(s) - nanoprobe , molybdenum disulfide , materials science , luminescence , optoelectronics , photoluminescence , femtosecond , autofluorescence , graphene , laser , semiconductor , biological imaging , second harmonic generation , nanotechnology , optics , fluorescence , nanoparticle , physics , metallurgy
More recently, tremendous progress has been achieved in the development of two‐dimensional semiconductor materials applied in catalyst, energy application, sensor device and bioengineering since the birth of graphene isolated from graphite. Layered molybdenum disulfide (MoS 2 ) as an indirect gap semiconductor can efficiently emit photoluminescence (PL) excited by visible light, which shows a great potential in adaptive biological imaging. However, 1 photon PL of MoS 2 for cell imaging purposes suffers from strong autofluorescence and ion‐induced PL quenching. Herein, we report single layer small chitosan decorated MoS 2 nanosheets as a nonbleaching, nonblinking optical nanoprobe under near infrared femtosecond laser excitation and their applications for strong 2 photon luminescence (TPL) and strong second harmonic generation (SHG) bioimaging. Furthermore, the TPL can resist the ion‐induced quenching on the cellular membrane. The proposed TPL and SHG of single‐layer MoS 2 show great potential for real‐time, deep, multiphoton and three‐dimensional bioimaging under low‐power laser excitation.