Melamine sponge skeleton loaded organic conductors for mechanical sensors with high sensitivity and high resolution

Abstract In recent years, due to the development of flexible electronics, flexible sensors have been widely concerned and applied in intelligent robots, brain-computer interfaces and wearable electronic devices. We propose a low-cost and high-efficiency sensor component preparation method. The sensor Tetrathiafulvalene-Tetracyanoquinodimethane/ melamine sponge (TTMS) takes a melamine sponge as a flexible substrate and metallizes the sponge with the organic conducting molecule Tetrathiafulvalene-Tetracyanoquinodimethane (TTF-TCNQ) to construct a conductive pathway with chemical stability. We use a physical load approach to ensure the advantages of low cost and efficient manufacturing. TTMS has good mechanical stability and can withstand 8000 compressions. 1000 cycles of cyclic voltammetry scanning proved that it also had good electrical stability. TTMS can distinguish pressure changes of 100 Pa and respond quickly to pressure application and release. These TTMS can be assembled to form an array of sensors that can distinguish the position and intensity of pressure. Therefore, the excellent performance of the sensor is expected to promote the commercial application of the piezoresistive sensor.