Cu-Doped ZnO Nanoparticles as an Electrochemical Sensing Electrode for Cardiac Biomarker Myoglobin Detection

Haque Mazharul; Fouad H.; Seo Hyung-KeeAlothman Othman Y.Ansari Z. A.

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Cu-Doped ZnO Nanoparticles as an Electrochemical Sensing Electrode for Cardiac Biomarker Myoglobin Detection

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Cu-doped ZnO nanoparticles were used in the form of a screen-printed electrode on a prefabricated gold-plated electrode for electrochemically determining the concentration of nanomolar myoglobin (Mb), a cardiac biomarker. Initially, Cu-doped ZnO nanoparticles were synthesised through the sol gel method by using three Cu-doping concentrations (varying number of Cu atoms). Then, the synthesised material was analysed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and field emission secondary electron microscopy. Analysis revealed a mixed phase of ZnO and CuO, whereas the vibration band in the range of 650-700 cm(-1) indicated metal oxide formation. Morphological observation showed uniform-sized spherical particles of approximately 15-20 nm (as nanoparticles) that were evenly distributed, which were also confirmed based on the average particle size estimated using XRD data. The developed electrodes were tested for biomarker concentration from 3 to 15 nM based on cyclic voltammogram and impedance spectroscopic curves, where the redox potential/current/charge transfer resistance changed linearly with Mb and dopant (Cu) concentration. The sensitivity was estimated as 2.13-10.14 mu AnM(-1) cm(-2) with dopant concentration of approximately 0.46 nM as the limit of detection.

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《IEEE sensors journal》 |2020年第15期|8820-8832|共13页
作者
Haque Mazharul; Fouad H.; Seo Hyung-KeeAlothman Othman Y.Ansari Z. A.;
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作者单位

Jamia Millia Islamia, Ctr Interdisciplinary Res Basic Sci, New Delhi 110025, India;

King Saud Univ, Appl Med Sci Dept, Community Coll, Riyadh 11433, Saudi Arabia;

Jeonbuk Natl Univ, Sch Chem Engn, Jeonju 54896, South KoreaKing Saud Univ, Chem Engn Dept, Coll Engn, Riyadh 11433, Saudi Arabia;

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正文语种英语
中图分类电工技术;
关键词
Acute Myocardial Infarction; Cardiovascular Disease; Electrochemical Sensor; Myoglobin Sensor; Zinc Oxide Nanoparticle;

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Cu-Doped ZnO Nanoparticles as an Electrochemical Sensing Electrode for Cardiac Biomarker Myoglobin Detection

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