The prospect of electronic circuits that are stretchable and bendable promises tantalizing applications such as skin-like electronics, roll-up displays, conformable sensors and actuators, and lightweight solar cells. The preparation of highly conductive and highly extensible materials remains a challenge for mass production applications, such as free-standing films or printable composite inks. Here we present a nanocomposite material consisting of carbon nanotubes, ionic liquid, silver nanoparticles, and polystyrene- polyisoprene-polystyrene having a high electrical conductivity of 3700 S cm -1 that can be stretched to 288% without permanent damage. The material is prepared as a concentrated dispersion suitable for simple processing into free-standing films. For the unstrained state, the measured thermal conductivity for the electronically conducting elastomeric nanoparticle film is relatively high and shows a non-metallic temperature dependence consistent with phonon transport, while the temperature dependence of electrical resistivity is metallic. We connect an electric fan to a DC power supply using the films to demonstrate their utility as an elastomeric electronic interconnect. The huge strain sensitivity and the very low temperature coefficient of resistivity suggest their applicability as strain sensors, including those that operate directly to control motors and other devices.
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机译：可伸展和可弯曲的电子电路的前景有望诱人的应用，例如类似皮肤的电子设备，可卷起的显示器，顺应性的传感器和致动器以及轻型太阳能电池。对于诸如独立式膜或可印刷复合油墨的大规模生产应用而言，制备高导电性和高延展性材料仍然是一个挑战。在这里，我们介绍了一种纳米复合材料，它由碳纳米管，离子液体，银纳米颗粒和具有3700 S cm -1的高电导率的聚苯乙烯-聚异戊二烯-聚苯乙烯组成，可以拉伸到288％，而不会造成永久损坏。该材料被制备为适合于简单加工成独立膜的浓缩分散体。对于未应变状态，所测量的导电弹性体纳米颗粒膜的导热率较高，并且显示出与声子传输一致的非金属温度依赖性，而电阻率的温度依赖性是金属的。我们使用薄膜将电风扇连接到DC电源，以展示其作为弹性电子互连的效用。巨大的应变敏感性和极低的电阻率温度系数表明它们适用于应变传感器，包括直接运行以控制电动机和其他设备的传感器。
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