講演情報
[19p-A602-15]Nanoparticle Film based on Mechanoplasmonic Sensors for Wearable Strain Applications of Human-Motion Monitoring
〇Hiroaki Matsui1, Akira Momose2, Hidehiko Yoda3, Aki Fujita4 (1.The Univ. of Tokyo, 2.KISTEC, 3.Utsunomiya Univ., 4.Sci. & Technol. Inst. Co.)
キーワード：
Mechanoplasmonics、Nanoparticle film、Strain sensor
In this presentation, we report optical strain sensors using assembled films comprising Sn-doped In2O3 nanoparticle films (ITO-NP films) deposited on elastomeric substrate sheets by functionalizing the IR reflection resonances as optical sensor probes for strain measurements. The IR reflection resonances, as solar blind wavelengths, were effectively tuned by applied strains in uniaxial tensile tests for the NP films. We found that the anisotropic fragments generated in the NP film by applied strains played important roles in detecting the strain and stress states of the PDMS sheet surfaces. We demonstrated strain detection using a substrate with a circular hole that produced the anisotropic stress distributions. Finally, we demonstrated the successful detection of human motion from actions to vigorous joint-related movements such as finger flexion. The reversible changes in reflection resonances in response to the bending and stretching of the index finger were monitored by optical measurements. To the best of our knowledge, for the first time, we revealed that the NP films can be used as a flexible and wearable strain sensor, providing insights for optical strain sensing based on SPR.