Electrochemical DNA detection of hepatitis E virus genotype 3 using PbS quantum dot labelling


The aim of this study was to develop a highly specific electrochemical DNA sensor using functionalized lead sulphide (PbS) quantum dots for hepatitis E virus genotype 3 (HEV3) DNA target detection. Functionalized-PbS quantum dots (QDs) were used as an electrochemical label for the detection of HEV3-DNA target by the technique of square wave anodic stripping voltammetry (SWASV). The functionalized-PbS quantum dots were characterized by UV-vis, FTIR, XRD, TEM and zeta potential techniques. As-prepared, functionalized-PbS quantum dots have an average size of 4.15 ± 1.35 nm. The detection platform exhibited LOD and LOQ values of 1.23 fM and 2.11 fM, respectively. HEV3-DNA target spiked serum is also reported.

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This study was financially suported by the Petchra Pra Jom Klao Doctoral, KMUTT; the Thailand Research Fund (Grant number: RSA6080050); and the KMUTT 55th Anniversary Commemorative Fund.

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Correspondence to Benchaporn Lertanantawong or Werasak Surareungchai.

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Ngo, D.B., Chaibun, T., Yin, L.S. et al. Electrochemical DNA detection of hepatitis E virus genotype 3 using PbS quantum dot labelling. Anal Bioanal Chem 413, 1027–1037 (2021). https://doi.org/10.1007/s00216-020-03061-1

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  • PbS quantum dots
  • Functionalization
  • Electrochemical DNA sensor
  • HEV3