Wearable strain sensors are attracting great attention owing to their remarkable applications in physiologicalmonitoring and motion-sensing. However, there are two limitations for the fabrication of wearable strain sensors because additional material synthesis process and additional adhesive material are necessary. In this presentation, we introduce the method for the fabrication of wearable and attachable strain sensors without additional process and material. By controlling laser parameters, we successfully fabricated wearable and attachable sensors consisting of silver nanowires and polymer having diverse mechanical and adhesive properties. Our work helps guide fabricating nanowire-based resistive wearable strain sensors using the laser- based 3D printing.
In this research, we present selective and rapid growth method of MnO2 nanostructures by laser. MnO2 nanostructures directly grow on metal layered substrate under ambient conditions. The MnO2 nanostructures grow through micro temperature field which is photothermally generated by continuous wave laser. Hemi-urchin shaped nanowire array grows about 5μm length and show 12.5 times faster than conventional hydrothermal method. We characterize analytically the growth mechanism of MnO2 nanostructures according to the laser irradiation time. In addition, MnO2 nanostructure shows different morphologies by adjusting laser powers and precursor concentrations.
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