Issue 18, 2019, Issue in Progress

A self-powered triboelectric nanosensor for detecting the corrosion state of magnesium treated by micro-arc oxidation

Abstract

Magnesium (Mg) is frequently used as a biocompatible implantable material in the human body, but real-time detection of its corrosion state is not well understood. Fortunately, previous studies of triboelectric nanogenerators (TENG) as self-driven sensors in many fields have proposed solutions for this problem. In this work, Mg-based TENG was prepared as a self-driven sensor to detect the corresponding corrosion state of Mg treated by micro-arc oxidation (MAO-Mg). Mg-based sheets and polydimethylsiloxane (PDMS) film were used as triboelectric materials. The output of TENG was optimal under 350 V–800 Hz micro-arc oxidation (MAO) treatment of Mg, and the Voc, Isc and Qsc were 48.5 V, 35.3 μA and 44.2 nC, which were respectively 2.42, 3.42 and 3.27 times that of the untreated devices. Moreover, a linear relationship was found in simulated body fluid (SBF) immersion tests, showing that the rates of decrease in Isc and Voc were respectively 3.48 and 2.74 times the weight reduction rates of MAO-Mg sheets, indicating that our sensors successfully detected the corrosion of MAO-Mg. This work will lay a preliminary foundation for real-time detection of Mg as an implant in the human body (as do other implantable materials), and demonstrates a potential new application for TENG in the biomedical field.

Graphical abstract: A self-powered triboelectric nanosensor for detecting the corrosion state of magnesium treated by micro-arc oxidation

Supplementary files

Article information

Article type
Paper
Submitted
19 Dec 2018
Accepted
14 Mar 2019
First published
01 Apr 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 10159-10167

A self-powered triboelectric nanosensor for detecting the corrosion state of magnesium treated by micro-arc oxidation

Y. Zhai, W. Li, M. Chen, Y. Li, Q. Wang and Y. Wang, RSC Adv., 2019, 9, 10159 DOI: 10.1039/C8RA10398D

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