articleAnalytical ChemistryNov 25, 2019Closed access

ZIF-8-Assisted NaYF4:Yb,Tm@ZnO Converter with Exonuclease III-Powered DNA Walker for Near-Infrared Light Responsive Biosensor

SLShuzhen LvKZKangyao ZhangLZLing ZhuDTDianping Tang

Fuzhou University

PubMed
Indexed incrossrefpubmed

Abstract

This work reports a ZIF-8 (ZIF: Zeolitic Imidazolate Framework)-assisted NaYF4:Yb,Tm@ZnO upconverter for the photoelectrochemical (PEC) biosensing of carcinoembryonic antigen (CEA) under near-infrared (NIR) irradiation on a homemade 3D-printed device with DNA walker-based amplification strategy. The composite photosensitive material NaYF4:Yb,Tm@ZnO, as converter to transfer NIR import to photocurrent output, was driven from annealed NaYF4:Yb,Tm@ZIF-8. Yb3+ and Tm3+-codoped NaYF4 (NaYF4:Yb,Tm) converted NIR excitation into UV emission, matching with the absorption of ZnO for in situ excitation to generate the photocurrent. Upon target CEA introduction, the swing arm of DNA walker including the sequence of CEA…

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476
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100%
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36
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Authors

4

Topics & keywords

Topics
Keywords
  • Exonuclease III
  • Photocurrent
  • Biosensor
  • Chemistry
  • Aptamer
  • Exonuclease
  • Guanine
  • Nanotechnology
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