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In situ synthesis of silver nanowire gel and its super-elastic composite foams.
Nanoscale ( IF 5.8 ) Pub Date : 2020-09-01 , DOI: 10.1039/d0nr03958f Shu Huang 1 , Chuang Feng 1 , Edwin L H Mayes 1 , Bicheng Yao 2 , Zijun He 3 , Sajjad Asadi 3 , Tuncay Alan 3 , Jie Yang 1
Nanoscale ( IF 5.8 ) Pub Date : 2020-09-01 , DOI: 10.1039/d0nr03958f Shu Huang 1 , Chuang Feng 1 , Edwin L H Mayes 1 , Bicheng Yao 2 , Zijun He 3 , Sajjad Asadi 3 , Tuncay Alan 3 , Jie Yang 1
Affiliation
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Noble-metal aerogels (NMAs) including silver aerogels have drawn increasing attention because of their highly conductive networks, large surface areas, and abundant optically/catalytically active sites. However, the current approaches of fabricating silver aerogels are tedious and time-consuming. In this regard, it is highly desirable to develop a simple and effective method for preparing silver aerogels. Herein, we report a facile strategy to fabricate silver gels via the in situ synthesis of silver nanowires (AgNWs). The obtained AgNW aerogels show superior electrical conductivity, ultralow density, and good mechanical robustness. AgNW aerogels with a density of 24.3 mg cm−3 display a conductivity of 2.1 × 105 S m−1 and a Young's modulus of 38.7 kPa. Furthermore, using an infiltration-air-drying-crosslinking technique, polydimethylsiloxane (PDMS) was introduced into 3 dimensional (3D) AgNW networks for preparing silver aerogel/elastomer composite materials. The obtained AgNW/PDMS aerogel composite exhibits outstanding elasticity while retaining excellent electrical conductivity. The fast piezoresistive response proves that the aerogel composite has a potential application for vibration sensors.
中文翻译：
银纳米线凝胶及其超弹性复合泡沫的原位合成
包括银气凝胶在内的贵金属气凝胶（NMA）因其高导电网络、大表面积和丰富的光学/催化活性位点而受到越来越多的关注。然而，目前制造银气凝胶的方法既繁琐又耗时。在这方面，非常需要开发一种简单有效的制备银气凝胶的方法。在此，我们报告了一种通过原位合成银纳米线（AgNW）来制造银凝胶的简便策略。获得的 AgNW 气凝胶具有优异的导电性、超低密度和良好的机械鲁棒性。密度为24.3 mg cm -3的AgNW气凝胶显示出2.1×10 5 S m -1的电导率和38.7 kPa的杨氏模量。此外，采用渗透-空气干燥-交联技术，将聚二甲基硅氧烷（PDMS）引入三维（3D）AgNW网络中，制备银气凝胶/弹性体复合材料。所得AgNW/PDMS气凝胶复合材料表现出优异的弹性，同时保留了优异的导电性。快速的压阻响应证明了气凝胶复合材料在振动传感器方面具有潜在的应用前景。
更新日期：2020-10-08
中文翻译：
银纳米线凝胶及其超弹性复合泡沫的原位合成
包括银气凝胶在内的贵金属气凝胶（NMA）因其高导电网络、大表面积和丰富的光学/催化活性位点而受到越来越多的关注。然而，目前制造银气凝胶的方法既繁琐又耗时。在这方面，非常需要开发一种简单有效的制备银气凝胶的方法。在此，我们报告了一种通过原位合成银纳米线（AgNW）来制造银凝胶的简便策略。获得的 AgNW 气凝胶具有优异的导电性、超低密度和良好的机械鲁棒性。密度为24.3 mg cm -3的AgNW气凝胶显示出2.1×10 5 S m -1的电导率和38.7 kPa的杨氏模量。此外，采用渗透-空气干燥-交联技术，将聚二甲基硅氧烷（PDMS）引入三维（3D）AgNW网络中，制备银气凝胶/弹性体复合材料。所得AgNW/PDMS气凝胶复合材料表现出优异的弹性，同时保留了优异的导电性。快速的压阻响应证明了气凝胶复合材料在振动传感器方面具有潜在的应用前景。
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