Jang, Hyeyoung Yoon, Hyungsuk Ko, Youngpyo Choi, Jaeyoo Lee, Sang-Soo Jeon, Insu Kim, Jong-Ho Kim, Heesuk 2024-01-20T05:00:42Z 2024-01-20T05:00:42Z 2021-09-03 2016-03 2040-3364 https://pubs.kist.re.kr/handle/201004/124365 Force sensors have attracted tremendous attention owing to their applications in various fields such as touch screens, robots, smart scales, and wearable devices. The force sensors reported so far have been mainly focused on high sensitivity based on delicate microstructured materials, resulting in low reproducibility and high fabrication cost that are limitations for wide applications. As an alternative, we demonstrate a novel capacitive-type force sensor with enhanced performance owing to the increased dielectric properties of elastomers and simple sensor structure. We rationally design dielectric elastomers based on alkylamine modified-multi-walled carbon nanotube (MWCNT)/polydimethylsiloxane (PDMS) composites, which have a higher dielectric constant than pure PDMS. The alkylamine-MWCNTs show excellent dispersion in a PDMS matrix, thus leading to enhanced and reliable dielectric properties of the composites. A force sensor array fabricated with alkylamine-MWCNT/PDMS composites presents an enhanced response due to the higher dielectric constant of the composites than that of pure PDMS. This study is the first to report enhanced performance of capacitive force sensors by modulating the dielectric properties of elastomers. We believe that the disclosed strategy to improve the sensor performance by increasing the dielectric properties of elastomers has great potential in the development of capacitive force sensor arrays that respond to various input forces. English ROYAL SOC CHEMISTRY STRAIN SENSORS PRESSURE SENSOR COMPOSITES NANOTUBES Enhanced performance in capacitive force sensors using carbon nanotube/polydimethylsiloxane nanocomposites with high dielectric properties Article 10.1039/c5nr07958f 1 NANOSCALE, v.8, no.10, pp.5667 - 5675 NANOSCALE 8 10 5667 5675 scie scopus 000371665400033 2-s2.0-84960419572 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article STRAIN SENSORS PRESSURE SENSOR COMPOSITES NANOTUBES