A Silicon Nanowire-Based Electrochemical Sensor with High Sensitivity and Electrocatalytic Activity

Authors

  • Shao Su,

    1. Key Laboratory for Organic Electronics & Information Displays (KLOEID) Institute of Advanced Materials (IAM) School of Materials Science and Engineering, Nanjing University of Posts & Telecommunications, Nanjing, China
    2. Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Jiangsu, China
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  • Xinpan Wei,

    1. Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Jiangsu, China
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  • Yuanyuan Guo,

    1. Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Jiangsu, China
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  • Yiling Zhong,

    1. Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Jiangsu, China
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  • Yuanyuan Su,

    1. Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Jiangsu, China
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  • Qing Huang,

    1. Laboratory of Physical Biology Shanghai Institute of Applied Physcis Chinese Academy of Sciences, Shanghai, China
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  • Chunhai Fan,

    Corresponding author
    1. Laboratory of Physical Biology Shanghai Institute of Applied Physcis Chinese Academy of Sciences, Shanghai, China
    • Key Laboratory for Organic Electronics & Information Displays (KLOEID) Institute of Advanced Materials (IAM) School of Materials Science and Engineering, Nanjing University of Posts & Telecommunications, Nanjing, China
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  • Yao He

    Corresponding author
    1. Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Jiangsu, China
    • Key Laboratory for Organic Electronics & Information Displays (KLOEID) Institute of Advanced Materials (IAM) School of Materials Science and Engineering, Nanjing University of Posts & Telecommunications, Nanjing, China
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E-mail: fchh@sinap.ac.cn, yaohe@suda.edu.cn

Abstract

A new kind of silicon nanowire (SiNWs)-based nanoelectrode assembly, a gold-nanoparticle-decorated silicon nanowire array (AuNPs@SiNWsAr), is employed for the construction of high-performance electrochemical sensors. Significantly, the electrochemical nanosensors are capable of sensitive detection of various electroactive molecules (e.g., dopamine (DA), ascorbic acid (AA), hydrogen peroxide (H2O2), and glucose). Further, DA molecules loaded on the surface of AuNPs@SiNWsAr preserve stable high electroactivity overnight without special protection, while free DA molecules may lose their biological activity due to severe oxidization in ambient environment. These findings may offer new opportunities for the design of high-performance electrochemical nanosensors with high sensitivity and robust stability.

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