Facile Preparation of MnO2 Quantum Dots with Enhanced Fluorescence via the Micro-environment Engineering with the Assistance of Some Reductive Biomolecules

ACS Applied Materials & Interfaces
Zhangyan MaShouzhuo Yao

Abstract

MnO2 nanomaterials have been aroused wide attention because of their nano-enzyme activity, redox property, good biocompatibility and therapy-related activities. However, not any report about self-luminescent MnO2 materials are concerned to date, which greatly hampered their further development in various fields. In this paper, luminescent MnO2 quantum dots (MnO2 QDs) has been firstly prepared via a facile one-step ultrasonic method. With the assistant of bovine serum albumin (BSA) or cysteine (Cys), the synthesized MnO2 QDs (BSA-MnO2 QDs or Cys-MnO2 QDs) display strongly enhanced fluorescence (FL). The prepared BSA-MnO2 QDs with the particles size of about 1-2 nm show the maximum excitation and emission peaks at 320 and 410 nm with excellent salt stability, anti-photo bleaching ability and time stability. It is confirmed that BSA play the dual function as the exfoliating agent to promote the exfoliation of bulk MnO2 nanosheets and as the capping agent to provide a friendly micro-environment for MnO2 QDs. Ag ions can destroy the micro-environment of BSA-MnO2 QDs owing to the in-situ formation of Ag nanoparticles (Ag NPs) mediated by the BSA on the surface of the QDs. Then these Ag NPs can quench the FL intensity of the QDs by fl...Continue Reading

References

Aug 30, 2011·Analytical Chemistry·Carolina Carrillo-CarriónMiguel Valcárcel
May 6, 2015·Journal of the American Chemical Society·Guijian GuanMing-Yong Han
Jul 15, 2015·Chemical Communications : Chem Comm·Yuhui WangHengwei Lin
Jun 24, 2017·Advanced Materials·Guijian GuanMing-Yong Han
Oct 26, 2018·ACS Applied Materials & Interfaces·Henan JiaWeidong Fei
Apr 2, 2019·Nanoscale·Guangfu LiaoBaizeng Fang
Dec 14, 2019·Advanced Science·Guijian Guan, Ming-Yong Han

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Citations

Jun 5, 2020·Chemical Communications : Chem Comm·Jia WenShiguo Sun
Aug 31, 2020·Mikrochimica Acta·Xiaotong Liu, Xingguang Su
Apr 29, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Ying ZhuYuxiang Bu
Jun 11, 2021·Mikrochimica Acta·Jiabao ZhangXingguang Su
Jul 18, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Chunyu JiangFei Ye

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