• 文献标题:   Self-powered transparent flexible graphene microheaters
  • 文献类型:   Article
  • 作  者:   KHAN U, KIM TH, LEE KH, LEE JH, YOON HJ, BHATIA R, SAMEERA I, SEUNG W, RYU H, FALCONI C, KIM SW
  • 作者关键词:   graphene microheater, hexagonal boron nitride passivation, transparent, flexible, sounddriven textile based triboelectric nanogenerator
  • 出版物名称:   NANO ENERGY
  • ISSN:   2211-2855 EI 2211-3282
  • 通讯作者地址:   Univ Roma Tor Vergata
  • 被引频次:   26
  • DOI:   10.1016/j.nanoen.2015.09.007
  • 出版年:   2015

▎ 摘  要

Transparent and flexible (IF) microheaters are required in wearable devices, labs-on-chip, and micro-reactors. Nevertheless, conventional microheaters are rigid or opaque or both. Moreover, the resistances of conventional metallic microheaters are too low to be effectively powered by wearable energy harvesters. Here, we demonstrate the first TF microheaters by taking advantage of chemical vapor deposition (CVD)-grown graphene heating tracks and of a hexagonal boron nitride (h-BN) sheet for passivation; the h-BN sheet increases the maximum temperature by 80%. Our TF microheaters show excellent temperature uniformity and can reach temperatures above 200 degrees C in just 4s, with power consumption as low as 39 mW. Additionally, since the CVD-graphene sheet resistance is orders of magnitude higher than that of typical metallic heaters, our devices can be effectively powered by wearable energy harvesters. As a proof-of-concept, we demonstrate the first self-powered, wearable microheater which achieves a temperature increase of 8 C when operated by a sound driven textile-based triboelectric nanogenerator. This is a key milestone towards next generation microheaters with applications in portable/wearable personal electronics, wireless health, and remote and mobile environmental sensors. (C) 2015 Elsevier Ltd. All rights reserved.