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Nano-p–n junction heterostructures enhanced TiO2 nanobelts biosensing electrode

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An Erratum to this article was published on 24 June 2015

Abstract

6-Phosphate aminopurine (6PA), a purine analog, is usually used in clinical anticancer treatment and biochemical research. Up to now, to the best of our knowledge, no literature about the electrochemical behaviors of 6PA has been reported. In this study, nano-p–n junction heterostructures based on TiO2 nanobelts were produced by the assembly of p-type semiconducting NiO nanoparticles onto the n-type surface-coarsened TiO2 nanobelts. The electrochemical behaviors of 6PA were investigated by different voltammetric techniques in a phosphate buffer solution of pH 7.4 using the heterostructures as the sensing electrode. Compared with single-phase TiO2 nanobelt electrodes, the resulting chemically modified electrodes exhibited higher surface accumulation ability and enhanced electrocatalytic activities in the oxidation for 6PA, with an irreversible oxidation peak at +0.91 V. It is proposed that the nano-p–n junction heterostructures played an important role in the enhancement of charge transport in the sensing electrodes. The results suggest that the nanoengineered TiO2 nanobelts might be a promising candidate for biosensing applications of nucleic acid drugs that will be of significance to diagnostic medicine and molecular biology research.

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Acknowledgments

This research was supported by NSFC (grant nos. 51102152, 50925205, and 51172132), Young Academic Leaders’ Climbing Program of Zhejiang Province (GK130204217002/001), China Science Foundation for Postdoctor (10000071311003), and Independent Innovation Foundation of Hangzhou Dianzi University (KYS195612009).

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Authors and Affiliations

  1. College of Life Information Science & Instrument Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China

    Jingjie Cui

  2. State Key Laboratory of Crystal Materials, Center of Bio & Micro/Nano Functional Materials, Shandong University, 27 Shandanan Road, Jinan, 250100, People’s Republic of China

    Jingjie Cui & Hong Liu

  3. Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA, 95064, USA

    Shaowei Chen

  4. Department of Chemistry, Georgia State University, Atlanta, GA, 30302, USA

    Zhen Huang

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  1. Jingjie Cui
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  2. Shaowei Chen
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  3. Hong Liu
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  4. Zhen Huang
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Correspondence to Jingjie Cui or Hong Liu.

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Cui, J., Chen, S., Liu, H. et al. Nano-p–n junction heterostructures enhanced TiO2 nanobelts biosensing electrode. J Solid State Electrochem 18, 2693–2699 (2014). https://doi.org/10.1007/s10008-014-2524-x

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  • DOI: https://doi.org/10.1007/s10008-014-2524-x

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