Recognition of Different Rough Surface Based Highly Sensitive Silver Nanowire-Graphene Flexible Hydrogel Skin

Abstract

Artificial flexible skin materials with high sensitivity, different roughness surface recognition, and a wide range of pressure sensing properties are urgent needs of artificial intelligence and wearable devices. Inspired by the identification ability between different rough objects of human skin, the novel flexible sensor device was developed to improve pressure sensitivity and surface roughness identification, consisting of silver nanowires, graphene, and biomineral hydrogels. Here, the prepared flexible skin has a wide range of high sensitivities including high-pressure sensitivity (0.9–5 KPa) and low-pressure sensitivity, which can detect the pressure of the rice size. Since graphene loaded with silver nanowires easily forms the sheet structure, it can undergo slight changes in pressure such as sphygmus rhythm, sound vibration, and joint bending. The flexible skin detects changes in electrical resistance caused by dynamic interaction between the sensor and the surface of the material being tested, distinguishing various fruit surfaces. The flexible skin containing silver nanowires has obvious antibacterial properties against Escherichia coli and Staphylococcus aureus. Furthermore, the prepared flexible skin can be applied to various fields such as artificial intelligence, tactile perception, and personal medical equipment, demonstrating its great potential in smart skin.

Conductive GelMA–Collagen–AgNW Blended Hydrogel for Smart Actuator

“…The silver nanowire (AgNW), showing excellent conductivity and flexibility, has been widely used as an electrode [ 20 ], conductive film [ 21 ], and energy harvesting material [ 22 ]. The hydrogel containing the AgNW was also employed for flexible skin [ 23 ], cell differentiation [ 24 , 25 ], biosensor [ 26 ], and actuator [ 27 ]. The conductive hydrogel has been previously generated by using collagen and AgNW [ 28 ].…”

Smart Hydrogels Meet Carbon Nanomaterials for New Frontiers in Medicine

“…The smart material responded to mechanical deformations by displaying changes in resistivity, which allowed the use as strain sensor [ 100 ]. Calcium ions also proved useful for the performance of a polyvinyl alcohol (PVA)-based hydrogel, where they served as cross-linkers; the material, with silver nanowires and graphene oxide (GO), was developed to create an artificial skin, with the ability to sense pressure variations [ 92 ]. Alternatively, borax was used as crosslinker for PVA which, combined with cellulose nanofibers and graphene, yielded a strain-sensing material with excellent self-healing ability ( Figure 3 ), which was also envisaged for creating artificial skin [ 87 ].…”

The Use of Megamolecular Polysaccharide Sacran in Food and Biomedical Applications

“…Sacran can be formulated as cosmetics as its larger particles have made it difficult to penetrate the skin, so it can remain on the surface of the skin [ 70 ]. Human skin can heal itself and may experience the external violent ambiance or stress changes [ 101 ]. One of the skin problems that many people experience is dry skin.…”