Lowering Internal Friction of 0D–1D–2D Ternary Nanocomposite‐Based Strain Sensor by Fullerene to Boost the Sensing Performance

Abstract

The development of strain sensors with both large strain range (>50%) and high gauge factor (>100) is a grand challenge. High sensitivity requires material to perform considerable structural deformation under tiny strain, whereas high stretchability demands structural connection or morphological integrity for materials upon large deformation, yet both features are hard to be achieved in one thin film. A new 0D–1D–2D ternary nanocomposite–based strain sensor is developed that possesses high sensitivity in broad working strain range (gauge factor 2392.9 at 62%), low hysteresis, good linearity, and long‐term durability. The skin‐mountable strain sensor, fabricated through one‐step screen‐printing process, is made of 1D silver nanowire offering high electrical conductivity, 2D graphene oxide offering brittle layered structure, and 0D fullerene offering lubricity. The fullerene constitutes a critical component that lowers the friction between graphene oxide–based layers and facilitates the sliding between adjacent layers without hurting the brittle nature of the nanocomposite film. When stretching, layer slippage induced by fullerene can accommodate partial applied stress and boost the strain, while cracks originating and propagating in the brittle nanocomposite film ensure large resistance change over the whole working strain range. Such high comprehensive performance renders the strain sensor applicable to full‐spectrum human motion detection.

Hydrous RuO2‐Decorated MXene Coordinating with Silver Nanowire Inks Enabling Fully Printed Micro‐Supercapacitors with Extraordinary Volumetric Performance

“…This deposition process was enabled by the presence of hydrophilic oxygencontaining functional groups on the MXene surface which serve as a surfactant to ruthenium chloride, allowing the positively charged Ru 3+ to adsorb onto the negatively charged MXene surface through electrostatic interactions. [33,34] The mass ratio between RuO 2 ·xH 2 O@MXene and AgNWs was optimized to be 0.75:1 (as detailed in the Experimental Section and the Supporting Information) and is subsequently denoted as R@M-A 0.75:1 . These RuO 2 nanoparticles were anchored in situ onto the surface of the MXene via strong chemical interactions between the residual oxygen-containing functional groups on the MXene and hydrous RuO 2 or through van der Waals interactions between the MXene and the nanoparticles.…”

“…[33,34] In detail, the RuO 2 ·xH 2 O@MXene and AgNW aqueous dispersions were mixed and uniformly dispersed through www.advenergymat.de www.advancedsciencenews.com intermittent strong agitation and ultrasonic treatment for 5 min. [33,34] In detail, the RuO 2 ·xH 2 O@MXene and AgNW aqueous dispersions were mixed and uniformly dispersed through www.advenergymat.de www.advancedsciencenews.com intermittent strong agitation and ultrasonic treatment for 5 min.…”

Multifunctional Ultrastretchable Printed Soft Electronic Devices for Wearable Applications

“…It can be observed from Figure 4a 38 wt% increases more and more sharply with the applied strain increases, attributing to the result of the synergistic effect of slip mechanism and microcrack propagation mechanism. [4,17] In the small strain range, the slip mechanism dominates, and the resistance increases slowly. As the strain increases, the microcracks appear and continue to diffuse, making the resistance increases rapidly.…”

“…With the rapid development of the Internet of Things (IoT), flexible wearable electronics have attracted widespread attention, including conductors, [1][2][3] sensors, [4][5][6] and heater devices. [7][8][9] As the key and primary component of wearable electronics, flexible and stretchable conductors are widely used in soft light-emitting devices, [10] sensors, [11,12] and energy devices, [13][14][15] which can be developed to fabricate the flexible strain sensors and heaters.…”

“…[9,23] Recently, www.advelectronicmat.de structure mainly consisting of functional conductive layer, and substrate layer, which can be prepared by depositing conductive materials on the surface of the substrate or embedding it in the substrate. [2,4,22,35] The preparation methods mainly include coating (spin coating, spray coating, dip coating, etc. ), [7,36,37] spinning (wet spinning, electrospinning, etc.…”