Contact resistance based tactile sensor using covalently cross-linked graphene aerogels

0553414 - FZÚ 2023 RIV GB eng J - Journal Article
Kumar, Prabhat - Šilhavík, Martin - Zafar, Zahid Ali - Červenka, Jiří
Contact resistance based tactile sensor using covalently cross-linked graphene aerogels.
Nanoscale. Roč. 14, č. 4 (2022), s. 1440-1451. ISSN 2040-3364. E-ISSN 2040-3372
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA19-23986S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : contact resistance * tactile sensor * graphene aerogel
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.7, year: 2022
Method of publishing: Limited access
https://doi.org/10.1039/d1nr06893h

Variable contact resistance between a highly elastic graphene aerogel and a rigid metal electrode is used for the analysis of non-binary pushing and pulling mechanical forces acting on the contact, enabling superior strain and pressure measurements. The variable contact resistance based electromechanical sensors demonstrate superfast, ultrasensitive and quantitative measurements of compressive and tensile stress from −1.18 MPa to 0.55 MPa. The sensors can operate over the temperature range of −60 to 100 °C, cover the whole skin and human motion range, and determine the weight of a grasped object. The measurement of such high forces has only been possible due to the high-temperature induced covalent cross-linking of graphene in the aerogel that provides high strength, durability, and fast response (<0.5 ms) to the sensing element. The study demonstrates the great potential of contact resistance-controlled sensing.
Permanent Link: http://hdl.handle.net/11104/0330526