Temperature-insensitive conductive composites for noninterference strain sensing

An ultra-flexible temperature-insensitive strain sensor

“…Remarkably, this sensor was thin and showed good flexibility compared with previous solution-processed near-zero-TCR strain sensors (Table S1, ESI †). 27,29,30,[36][37][38]40,41 As shown in Fig. S4 (ESI †), the TCR and gauge factor of the sensor were not compromised even when the thin substrate was used.…”

“…The materials studied include carbon materials, [24][25][26][27][28][29][30][31] combinations of indium tin oxide and metals, 32,33 and nanocomposites of TaN and Cu. 34 In addition, other methods have used alloys such as coppernickel, the electrical conduction control of materials, [35][36][37][38][39] the control of the thermal expansion of a base film, 40 and the ligand design of Ag nanoparticles (NPs). 41 Such varied approaches have been used to create strain sensors that are less susceptible to environmental temperature.…”

“…However, an ultra-flexible near-zero-TCR strain sensor using a solution process has not yet been achieved (Table S1, ESI †). [27][28][29][30]32,33,[35][36][37][38]40,41 For sensors that apply strain to the sensor material through the bending of a substrate, the substrate should be thin, and a soft sensor material should be used to obtain excellent flexibility. However, soft strain-sensor materials with near-zero-TCR characteristics have not yet been fabricated using thin substrates.…”

“…However, soft strain-sensor materials with near-zero-TCR characteristics have not yet been fabricated using thin substrates. Substrates with a thickness of approximately 30 mm 28 or more 27,29,33,35,37,38,40,41 have been used. Substrates thinner than a few tens of micrometers tend to undergo deflection or wrinkling during fabrication, making them difficult to handle.…”

All-Three-Dimensionally-Printed AgPd Thick-Film Strain Gauge with a Glass–Ceramic Protective Layer for High-Temperature Applications

“…Therefore, these strain gauges have struggled to meet the demand for in situ strain monitoring of hot-end components. High-temperature thin/thick film strain gauges (TFSGs) have attracted attention recently due to their small size, fast response time, and easy integration with hot-end components. − Typical high-temperature resistant alloy materials, such as PdCr and PtRh, have been used as sensitive materials for TFSGs owing to their low temperature coefficient of resistance (TCR) and linear resistance–temperature curves . For instance, Liu et al have demonstrated a PdCr strain gauge based on the magnetron sputtering technique, with a TCR of 155.3 ppm/°C from room temperature to 800 °C .…”