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Deng Zejun

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Groupe Electrochimie et Couches Minces

Contact :

+33 (0)1 69 33 46 65

Education :

2017 - Now : PhD studies in Electrochemistry and Thin Films at PMC
2014 - 2017 : Master degree of Materials Science at Central South University
2010 - 2014 : Bachelor’s degree of Materials Science and Engineering at Central South University

Research Topic :

My PhD topic focuses on single nano-object electrochemistry. I am currently studying electrochemical collisions of single insulating and conducting objects. In terms of insulating particles, these particles can block an electrochemical reaction of a solution redox species by landing on an electrode and decreasing its effective area. For conducting particles landing on an electrode, they can be divided into two parts, catalytic and non-catalytic ones. In above approaches, the size of the electrode compared to that of single particles is clearly important. Meanwhile in many cases the geometry of the electrode is also needed considered because of ‘edge effect’ of disk microelectrodes. We proposed a simple and robust method to obtain a hemispherical microelectrode to eliminate ‘edge effect’ of disk microelectrodes [ref. 1]. Besides, the analysis of the behavior is based on measuring the frequency of the collisions, the magnitude, and the shape of the response, etc.
Selected publications :

1. Zejun Deng, Ridha Elattar, Fouad Maroun, and Christophe Renault*. In Situ Measurement of the Size Distribution and Concentration of Insulating Particles by Electrochemical Collision on Hemispherical Ultramicroelectrodes, Anal. Chem., 2018, 90 (21), pp 12923–12929.

2. Yunlu Jiang, Zejun Deng, Bo Zhou, et al. Nickel-induced transformation of diamond into graphite and carbon nanotubes and the electron field emission properties of resulting composite films, Appl. Surf. Sci., 2018 (428) 264-271.

3. Xueru Mei, Qiuping Wei, Hangyu Long, Zhiming Yu, Zejun Deng, et al. Long-term stability of Au nanoparticle-anchored porous boron-doped diamond hybrid electrode for enhanced dopamine detection, Electrochimi. Acta., 2018 (271) 84-91.

4. Zejun Deng, Hnagyu Long, Qiuping Wei, et al. High-performance non-enzymatic glucose sensor based on nickel-microcrystalline graphite-boron doped diamond complex electrode, Sens. Actuat. B-Chem., 2017 (242) 825-834.