电子皮肤(e-skin)由于其多样化的潜在应用而引起了人们的极大兴趣,包括在生理信号检测中,健康监测,和人造喉咙。然而,传统电子皮肤的主要缺点是基材的附着力弱,灵敏度和拉伸性之间的不相容性,和它的单一功能。这些缺点限制了电子皮肤的应用,增加了其多功能集成的复杂性。在这里,将多层石墨烯层内和之间的交联SWCNT的协同网络直接滴涂到具有自粘附性的PU薄膜上以制造多功能电子皮肤。制备的电子皮肤的优异机械性能源于SWCNT在各种应变下以小和大变形保证的足够的导电路径。制备的电子皮肤表现出低的检测限,小至0.5%应变,以及在应变为0-30%时具有964的应变系数(GF)的灵敏度和拉伸性之间的相容性,和2743在30-60%的应变。在生理信号检测中的应用,电子皮肤展示了对微妙运动的检测,比如动脉脉搏和眨眼,以及大的身体运动,如膝关节弯曲,肘部运动,颈部运动。在人工咽喉应用中,电子皮肤集成了声音识别和声音发出,并显示不同的喉咙肌肉运动和声音信号采集和识别的不同单词之间的清晰和不同的反应,结合具有71dB(f=12.5kHz)的声谱响应的优越的声音发射性能。总的来说,对新型材料的综合研究,结构,属性,和机制在生理信号检测和人工咽喉应用中提供了有前途的潜力。
Electronic skin (e-skin) has attracted tremendous interest due to its diverse potential applications, including in physiological signal detection, health monitoring, and artificial throats. However, the major drawbacks of traditional e-skin are the weak adhesion of substrates, incompatibility between sensitivity and stretchability, and its single function. These shortcomings limit the application of e-skin and increase the complexity of its multifunctional integration. Herein, the synergistic network of crosslinked SWCNTs within and between multilayered graphene layers was directly drip coated onto the PU thin film with self-adhesion to fabricate versatile e-skin. The excellent mechanical properties of prepared e-skin arise from the sufficient conductive paths guaranteed by SWCNTs in small and large deformation under various strains. The prepared e-skin exhibits a low detection limit, as small as 0.5% strain, and compatibility between sensitivity and stretchability with a gauge factor (GF) of 964 at a strain of 0-30%, and 2743 at a strain of 30-60%. In physiological signals detection application, the e-skin demonstrates the detection of subtle motions, such as artery pulse and blinking, as well as large body motions, such as knee joint bending, elbow movement, and neck movement. In artificial throat application, the e-skin integrates sound recognition and sound emitting and shows clear and distinct responses between different throat muscle movements and different words for sound signal acquisition and recognition, in conjunction with superior sound emission performance with a sound spectrum response of 71 dB (f = 12.5 kHz). Overall, the presented comprehensive study of novel materials, structures, properties, and mechanisms offers promising potential in physiological signals detection and artificial throat applications.