Enhanced Strain Sensitivity and Thermal Stability of Metal-Graphene Bilayer Structure via Incorporation of Sputtered Metallic Glass Thin Film
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Metallic glass (MG) thin film has been considered for a key component for various flexible electronics which attributed to its high mechanical robustness and chemical inertness. MG consists of atoms arranged in amoprhous structure in solid state, which allows high resistivity toward crack formation and chemical oxidation due to its absence of grain boundary. However, fabricating strain sensor based MG thin film has not been thoroughly investigated due to its intrinsically low elastic limit, as found in metallic and ceramic materials. In order to compensate the issue, in this research, layer-by-layer assembly coating of graphene nanoplatelets is adopted to achieve wide operation range over 10% strain. Furthermore, MG is found to be more environmentally stable compared to its crystalline counterparts, which approves its reliability and applicability for strain sensing under various conditions.