Issue 21, 2015

A hemin binding G-quadruplex/Pb2+ complex to construct a visible light activated photoelectrochemical sensor on a ZnO/BiOI heterostructure

Abstract

This study reported the development of a p–n heterojunction photoelectrochemical biosensor using a G-quadruplex as the recognition system. The n-type ZnO nanorods and p-type BiOI nanoflakes were combined to form the heterostructure by in situ growth of BiOI attributed to a simple impregnating-hydroxylation method. This simple p–n heterojunction fabrication method could facilitate the development of rapid and sensitive visible light activated PEC sensors. In this study, the ZnO/BiOI photoelectrode showed a rapid photocurrent decrease in the presence of Pb2+ due to the electron withdrawing effect of hemin which bound with the G-quadruplex/Pb2+ complex. This PEC biosensor exhibited a good response following the concentration of Pb2+ in the range from 10 to 100 μM.

Graphical abstract: A hemin binding G-quadruplex/Pb2+ complex to construct a visible light activated photoelectrochemical sensor on a ZnO/BiOI heterostructure

Supplementary files

Article information

Article type
Paper
Submitted
21 Aug 2015
Accepted
29 Sep 2015
First published
30 Sep 2015

Anal. Methods, 2015,7, 9340-9346

A hemin binding G-quadruplex/Pb2+ complex to construct a visible light activated photoelectrochemical sensor on a ZnO/BiOI heterostructure

K. Wang, N. Sun, X. Li, R. Zhang, G. Zu, J. Wang and R. Pei, Anal. Methods, 2015, 7, 9340 DOI: 10.1039/C5AY02197A

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