Kim, Hanul Choi, Seongdae Lee, Byeongmoon Seo, Jiseok Lee, Seunghwan Yoon, Jinsu Hong, Yongtaek 2024-01-19T10:32:34Z 2024-01-19T10:32:34Z 2023-01-03 2022-12 1944-8244 https://pubs.kist.re.kr/handle/201004/114219 Soft pressure sensors play key roles as input devices of electronic skin (E-skin) to imitate real human skin. For efficient data acquisition according to stimulus types such as detailed pressure images or macroscopic strength of stimuli, soft pressure sensors can have variable spatial resolution, just like the uneven spatial distribution of pressure-sensing receptors on the human body. However, previous methods on soft pressure sensors cannot achieve such tunability of spatial resolution because their sensor materials and read-out electrodes need to be elaborately patterned for a specific sensor density. Here, we report a universal soft pressure-sensitive platform based on anisotropically self-assembled ferromagnetic particles embedded in elastomer matrices whose spatial resolution can be facilely tuned. Various spatial densities of pressure-sensing receptors of human body parts can be implemented by simply sandwiching the film between soft electrodes with different pitches. Since the anisotropically aligned nickel particles form independent filamentous conductive paths, the pressure sensors show spatial sensing ability without crosstalk, whose spatial resolution up to 100 dpi can be achieved from a single platform. The sensor array shows a wide dynamic range capable of detecting various pressure levels, such as liquid drops (similar to 30 Pa) and plantar (similar to 300 kPa) pressures. Our universal soft pressure -sensing platform would be a key enabling technology for actually imitating the receptor systems of human skin in robot and biomedical applications. English American Chemical Society Nonpatterned Soft Piezoresistive Films with Filamentous Conduction Paths for Mimicking Multiple-Resolution Receptors of Human Skin Article 10.1021/acsami.2c16929 1 ACS Applied Materials & Interfaces, v.14, no.49, pp.55088 - 55097 ACS Applied Materials & Interfaces 14 49 55088 55097 N scie scopus 000898063400001 2-s2.0-85143549193 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article ELECTRONIC SKIN HUMAN HAND SENSORS TACTILE COMPOSITE PRESSURE DISCRIMINATION FRAGMENTATION POLYETHYLENE DENSITIES pressure sensor electronic skin sensor matrix nonpatterned multiple resolution piezoresistive