Matter
ReviewCellular Graphene: Fabrication, Mechanical Properties, and Strain-Sensing Applications
Progress and Potential
Excellent strain- and pressure-sensing performances, such as large dynamic range and ultrahigh sensitivity, have been demonstrated by sensors made of cellular graphene, attributed to various fabrication techniques and derived mechanical properties. However, major challenges remain in the development of cellular graphene-based strain and pressure sensors, which include precise control on cellular structure, durability and stability, and differentiating multideformation modes. In this review, the fabrication of cellular graphene is first summarized, with emphasis on the engineering of their mechanical properties. Recent advances in the design of cellular graphene-based strain and pressure sensors are then presented, with their advantages and problems critically analyzed. Future research efforts should focus on in-depth understanding of structure-property-function correlations of cellular graphene-based sensors and generalization of the design principles to the fabrication of other two-dimensional materials-based sensors.