Gu, Ji-Woo Bae, Jae-Young LI GUANGZHE Hwang, Hae Won Lee, So-Hyeon Choi, Sung-Geun Kim, Ju-Young Ok, Myoung Ryul Kim, Yu-Chan Kang, Seung-Kyun 2024-01-12T06:34:04Z 2024-01-12T06:34:04Z 2023-11-17 2023-09 https://pubs.kist.re.kr/handle/201004/79828 Biodegradable metals as electrodes, interconnectors, and device conductors are essential components in the emergence of transient electronics, either for passive implants or active electronic devices, especially in the fields of biomedical electronics. Magnesium and its alloys are strong candidates for biodegradable and implantable conducting materials because of their high conductivity and biocompatibility, in addition to their well-understood dissolution behavior. One critical drawback of Mg and its alloys is their considerably high dissolution rates originating from their low anodic potential, which disturbs the compatibility to biomedical applications. Herein, we introduce a single-phase thin film of a Mg？Zn binary alloy formed by sputtering, which enhances the corrosion resistance of the device electrode, and verify its applicability in biodegradable electronics. The formation of a homogeneous solid solution of single-phase Mg？3Zn was confirmed through X-ray diffraction and transmission electron microscopy. In addition, the dissolution behavior and chemistry was also investigated in various biological fluids by considering the effect of different ion species. Micro-tensile tests showed that the Mg？3Zn alloy electrode exhibited an enhanced yield strain and elongation in relation to a pure Mg electrode. Cell viability test revealed the high biocompatibility rate of the Mg？3Zn binary alloy thin film. Finally, the fabrication of a wireless heater demonstrated the integrability of biodegradable electrodes and highlighted the ability to prolong the lifecycle of thermotherapy-relevant electronics by enhancing the dissolution resistance of the Mg alloy. English National Engineering Research Center for Magnesium Alloys of China, Chongqing University Corrosion characteristics of single-phase Mg-3Zn alloy thin film for biodegradable electronics Article 10.1016/j.jma.2023.06.016 1 Journal of Magnesium and Alloys, v.11, no.9, pp.3241 - 3254 Journal of Magnesium and Alloys 11 9 3241 3254 Y scie scopus 001107356800001 Metallurgy & Metallurgical Engineering Metallurgy & Metallurgical Engineering Article MG-ZN TRANSIENT ELECTRONICS MECHANICAL-PROPERTIES GRAIN-SIZE CA ALLOYS MAGNESIUM BEHAVIOR MICROSTRUCTURE ZINC CONDUCTIVITY Biodegradable alloy Mg-3Zn binary alloy Solid-solution thin film electrode Biodegradable conductor Transient electronics