In-situ synthesis of silver nanoparticles on porous silicon nanostructure through galvanic displacement reaction and its application in construction of glucose screen printed sensor

Micro & nano letters

article

Farzad Allahnouri¹  Khalil Farhadi¹  Habibollah Eskandari²  Rahim Molaei¹  Mehdi Mokhtari Abarghoui³  Mehrdad Forough¹ 

[1] Department of Analytical Chemistry, Faculty of Chemistry, Urmia University;Department of Chemistry, University of Mohaghegh Ardabili;Department of Chemistry, Isfahan University of Technology

关键词: catalysis;    scanning electron microscopy;    silicon;    X-ray photoelectron spectra;    nanoparticles;    amperometric sensors;    X-ray chemical analysis;    sugar;    nanocomposites;    nanofabrication;    X-ray diffraction;    nanosensors;    voltammetry (chemical analysis);    electrochemical electrodes;    silver;    oxidation;    Fourier transform infrared spectra;    field emission scanning electron microscopy;    X-ray photoelectron spectroscopy;    electrochemical methods;    Ag-Si;    nanocomposites;    galvanic displacement reaction;    electrocatalytic activity;    energy dispersive X-ray spectroscopy;    Fourier transform infrared spectroscopy;    X-ray diffraction;    field emission scanning electron microscopy;    hydrofluoric acid;    silver ions;    porous silicon nanostructure;    silver nanoparticles;    ascorbic acid;    enzymatic free glucose sensor;    amperometric glucose screen-printed carbon electrode;    PSi flour;    glucose oxidation;    nanocomposite;   

DOI  :  10.1049/mnl.2018.5242

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this work, a new nanocomposite as silver nanoparticles (AgNPs)@ porous silicon (PSi) was synthesised through a simple galvanic displacement reaction between silver ions and silicon in the presence of hydrofluoric acid. The as-prepared nanocomposites were characterised via field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy and electrochemical methods. Since the nanocomposite showed a greatly enhanced electrocatalytic activity towards the glucose oxidation in alkaline solution, Ag nanoparticles supported on PSi flour were used as a performance modifier in the construction of a new amperometric glucose screen-printed carbon electrode. The enzymatic free glucose sensor based on AgNPs@PSi exhibited a wide linear dynamic range of 1 × 10−6 –45.7 × 10−3 M, with a detection limit of 6 × 10−7 M at a signal-to-noise ratio of 3, and fast response (<3 s). Also, the response of the proposed sensor was selective towards glucose in the presence of common species such as ascorbic acid, dopamine, uric acid and Cl− ions. Finally, the sensor was successfully applied to determine glucose in human serum samples.

【 授权许可】

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