Manufacture of high sensitive Ag-Fe3O4-PDMS nanocomposite pressure sensor through morphology control of conductive filler
| Autor: | Kun-Jae Lee, Namhun Kwon, Keunhyuk Ryu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Nanocomposite Polydimethylsiloxane General Chemical Engineering Contact resistance 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Thermal conductivity chemistry Mechanics of Materials Etching (microfabrication) Composite material 0210 nano-technology Contact area Electrical conductor |
| Zdroj: | Advanced Powder Technology. 32:2441-2448 |
| ISSN: | 0921-8831 |
| Popis: | Silver nanowire (AgNW) has been proposed as a promising conductive filler candidate based on its excellent electrical and thermal conductivity properties. However, residual PVP (polyvinylpyrrolidone) exists on the surface of AgNW synthesized through the polyol process. As a result, there is a problem in that the contact resistance (RC) is increased. This problem can be solved by improving the contact area between AgNWs. Therefore, in this study, the electrical conductivity characteristics of AgNW were to be improved by etching which can increase the contact area of AgNW. The concentration of etchant was adopted as the main parameter, and ideal etching parameter was derived by analyzing the microstructure and electrical conductivity characteristics of the etched AgNW. The etched AgNW showed a minimum resistance of 0.034 kΩ/□, and the etched AgNW showed about 23% improved surface area compared to the as-prepared AgNW. In addition, by controlling the ultrasonic milling parameters, it was intended to produce Fe3O4 nanoparticles (Fe3O4 NP) that make the conductive structure less dense and prevent stacking between AgNWs by acting as a nano-spacer. The prepared Fe3O4 NP showed an average particle size distribution of 150 nm or less. Ag-Fe3O4-PDMS (Polydimethylsiloxane) nanocomposite was prepared through such a conductive filler. As a result of analyzing the response characteristics of Ag-Fe3O4-PDMS nanocomposite, the resistance decreased linearly as the applied pressure increased, and the root-mean-square was 0.99 or higher. |
| Databáze: | OpenAIRE |
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