All-graphene strain sensor on soft substrate. (May 2017)

• Record Type: Journal Article
• Authors: Chun, Sungwoo; Choi, Yeonhoi; Park, Wanjun
• Is Part Of: Carbon. Volume 116(2017)
• Page Start: 753
• Page End: 759
• Publication Date: 2017-05
• Subjects: Graphene sensors -- Graphene strain sensors -- Graphene electrodes -- Single-layer graphene -- Graphene flakes; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2017.02.058
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: We propose a transparent and stretchable all-graphene strain sensor that can detect various types of strain induced via stretching, bending, and torsion. The sensor is fabricated by introducing single-layer graphene as a force sensing material with a conductive film composed of graphene flake for the electrode. With the exclusive use of flexible materials, the completed strain sensor is fully flexible. Using a serpentine-shaped pattern for the single-layer graphene, the sensor is capable of stretching up to 20% with a high gauge factor (42.2). In addition, the sensor provides functional extension to bi-directional responses. This sensor can detect infinitesimal strain as low as 0.1% with a relative resistance change (ΔR/R0 ) of ∼0.005. Finally, sensitive detection of strains induced via bending and torsion are successfully demonstrated. Graphical abstract: All-graphene strain sensor on soft substrate for the sensor that provides functional extension to bi-directional responses.