Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 58, Issue -, Pages 730-736Publisher
ELSEVIER
DOI: 10.1016/j.msec.2015.09.066
Keywords
Carbon dots; Novel synthesis method; Photoluminescent mechanism; Biological imaging
Categories
Funding
- National High-Tech Research and Development Plan of China (863 plan) [2011AA06A107]
- National Nature Science Foundation of China [21473055, 21273073]
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A simple and green approach was developed to synthesize highly fluorescent carbon dots (CDs) using albumin as a carbon source in aqueous solution at room temperature. The CDs were characterized by excellent monodispersion, superior photostability, pH-independent emission, long fluorescence lifetime and high quantum yield (QY). The photoluminescent (PL) mechanism of CDs was explored by means of time-resolved PL decay, and the results revealed that PL originated from the emission of both defect state and intrinsic state. In addition, biological imaging with the application of CDs was carried out in human breast cancer Bcap-37 cell, which demonstrated that CDs were provided with an excellent biocompatiblity, low cytotoxicity and good transmembrane ability. Besides, CDs could be considered as a potential substitute for organic dyes or semiconductor quantum dots (SQDs) in biological imaging. (C) 2015 Elsevier B.V. All rights reserved.
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