Advances in Carbon-Based Resistance Strain Sensors

Abstract

Carbon materials, such as CB, CNTs, graphene and CFs, have excellent conductivity, mechanical properties and chemical stability, and have been fully developed and applied in the field of smart wearable devices, especially the resistance strain sensors prepared from carbon materials. Although various feasible configurations of carbon-based resistance strain sensors have been proposed, challenges regarding material design, preparation methods, and low practicality still exist. This paper reviews the latest research progress of carbon-based resistance strain sensors from the perspective of preparation methods, and discusses the mechanical properties, effective sensing tensile range, sensitivities, and different application scenarios, and provides suggestions and prospects for producing carbon-based resistance strain sensors. Finally, the future challenges and favorable development opportunities in the field of carbon-based resistance strain sensors are summarized.

Sandwich-Like Flexible Breathable Strain Sensor with Tunable Thermal Regulation Capability for Human Motion Monitoring

“…Until now, the primary approach to enhancing the stability of sensors has involved encapsulating the sensing layer with packaging materials such as poly­(dimethylsiloxane) and Ecoflex. − Despite significant advancements, the enhancement in comprehensive properties, including mechanical stretchability and sensing performance, remains suboptimal due to the mismatched Young’s modulus between the flexible substrate and encapsulation layer. , Additionally, most of the above-mentioned polymer packaging materials suffer from a low intrinsic thermal conductivity, making it difficult to meet the high thermal dissipation demands of flexible electronics. Over the past decade, substantial effort has been devoted to enhancing the thermal conductivity of polymers by incorporating highly thermally conductive and electric insulating fillers. − Among these fillers, boron nitride nanosheets (BNNSs) with wide band gap (∼5.9 eV), high aspect ratio, and distinguished theoretical thermal conductivity have emerged as leading candidates for fabricating thermally dissipative composites. − Particularly, the high orientation and strong van der Waals interactions between the polymer and BNNS are beneficial to constructing effective thermally conductive pathways and reducing phonon scattering among the interacting units, hence greatly enhancing the thermal conductivity at low filler percolation thresholds. − In this regard, the strategic design of both electrical and thermal conduction channels based on electrospinning polymer/MXene films and polymer/BNNS composites is expected to enhance the sensing performance and realize rapid heat dissipation in flexible strain sensors.…”

Facile Graphene Oxide Modification Method via Hydroxyl-yne Click Reaction for Ultrasensitive and Ultrawide Monitoring Pressure Sensors

“…As an alternative to developing novel materials, enhancing the robustness, durability, and functionality of existing materials offers a feasible strategy for achieving our sustainability objectives. On the other hand, significant attention has been dedicated to wearable electronics, − which play a pivotal role in advancing motion recognition and detection, , human–machine interaction, , and intelligent robotics . Exploring innovative sensitive materials and structural designs represents a time and cost-efficient approach to developing advanced wearable devices with properties of high sensitivity, wide detection range, and enhanced stability and durability. ,− Various sensitive materials have been documented, including zero-dimensional metal nanoparticles, one-dimensional conductive polymer fibers and metal nanowires, , as well as two-dimensional graphene and graphene-like materials. , …”

Ligand-assisted solvothermal precipitation synthesis of quantum-sized SnO2 nanoparticles and their application in quantum dot light emitting diodes

“…32 After that, a number of research groups have also fabricated high-performance QD-LEDs based on quantumsized SnO 2 ETLs. [33][34][35][36][37][38][39] Since the CBM position of SnO 2 nanoparticles is highly dependent on their size, and the Bohr exciton diameter of SnO 2 is only 5.4 nm, the synthesis of extremely small SnO 2 nanoparticles with a narrow size distribution is critically important. 32 In previous reports, quantum-sized SnO 2 nanoparticles were usually synthesized using a hydrothermal/solvothermal method, 40,41 a hydrolytic method, 42 a nonaqueous sol-gel approach, 43 and microwave-assisted synthesis.…”