• 文献标题:   Graphene oxide-based biosensor for sensitive fluorescence detection of DNA based on exonuclease III-aided signal amplification
  • 文献类型:   Article
  • 作  者:   ZHAO XH, MA QJ, WU XX, ZHU X
  • 作者关键词:   graphene oxide, exonuclease iii, signal amplification, fluorescence, dna detection, biosensor
  • 出版物名称:   ANALYTICA CHIMICA ACTA
  • ISSN:   0003-2670 EI 1873-4324
  • 通讯作者地址:   Henan Univ Tradit Chinese Med
  • 被引频次:   67
  • DOI:   10.1016/j.aca.2012.03.044
  • 出版年:   2012

▎ 摘  要

Based on the super fluorescence quenching efficiency of graphene oxide and exonuclease ill aided signal amplification, we develop a facile, sensitive, rapid and cost-effective method for DNA detection. In the presence of target DNA, the target-probe hybridization forms a double-stranded structure and exonuclease III catalyzes the stepwise removal of mononucleotides from the blunt 3' termini of probe, resulting in the recycling of the target DNA and signal amplification. Therefore, our proposed sensor exhibits a high sensitivity towards target DNA with a detection limit of 20 pM, which was even lower than previously reported GO-based DNA sensors without enzymatic amplification, and provides a universal sensing platform for sensitive detection of DNA. (C) 2012 Elsevier B.V. All rights reserved.