Highly Sensitive Stretchable Electronic Skin with Isotropic Wrinkled Conductive Network
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Soft-pressure sensors have numerous applications in soft robotics, biomedical devices, and wearable smart devices. Herein, we presenta highly sensitive electronic skin device with an isotropic wrinkled pressure sensor. A conductive ink for soft pressure sensors isproduced by a solution process using polydimethylsiloxane (PDMS), poly 3-hexylthiophene (P3HT), carbon black, and chloroform asthe solvents. P3HT provides high reproducibility and conductivity by improving the ink dispersibility. The conductivity of the ink is optimizedby adjusting the composition of the carbon black and PDMS. Soft lithography is used to fabricate a conductive elastic structurewith an isotropic wrinkled structure. Two conductive elastic structures with an isotropic wrinkle structure is stacked to develop a pressuresensor, and it is confirmed that the isotropic wrinkle structure is more sensitive to pressure than when two elastic structures with an anisotropicwrinkle structure are overlapped. Specifically, the pressure sensor fabricated with an isotropic wrinkled structure can detectextremely low pressures (1.25 Pa). Additionally, the sensor has a high sensitivity of 15.547kpa-1 from 1.25 to 2500 Pa and a linear sensitivity of 5.15 kPa-1 from 2500 Pa to 25 kPa.
Abstract
Soft-pressure sensors have numerous applications in soft robotics, biomedical devices, and wearable smart devices. Herein, we presenta highly sensitive electronic skin device with an isotropic wrinkled pressure sensor. A conductive ink for soft pressure sensors isproduced by a solution process using polydimethylsiloxane (PDMS), poly 3-hexylthiophene (P3HT), carbon black, and chloroform asthe solvents. P3HT provides high reproducibility and conductivity by improving the ink dispersibility. The conductivity of the ink is optimizedby adjusting the composition of the carbon black and PDMS. Soft lithography is used to fabricate a conductive elastic structurewith an isotropic wrinkled structure. Two conductive elastic structures with an isotropic wrinkle structure is stacked to develop a pressuresensor, and it is confirmed that the isotropic wrinkle structure is more sensitive to pressure than when two elastic structures with an anisotropicwrinkle structure are overlapped. Specifically, the pressure sensor fabricated with an isotropic wrinkled structure can detectextremely low pressures (1.25 Pa). Additionally, the sensor has a high sensitivity of 15.547kpa-1 from 1.25 to 2500 Pa and a linear sensitivity of 5.15 kPa-1 from 2500 Pa to 25 kPa.
참고문헌 (19)
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