期刊
NANO ENERGY
卷 17, 期 -, 页码 356-365出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2015.09.007
关键词
Graphene microheater; Hexagonal boron nitride passivation; Transparent; Flexible; Sound-driven textile based triboelectric nanogenerator
类别
资金
- Center for Advanced Soft-Electronics as Global Frontier Project [2013M3A6A5073177]
- National Research Foundation (NRF) of Korea Grant - Ministry of Science, ICT AMP
- Future Planning [2009-0083540]
- Italian Institute of Technology (Project Seed-API NANE)
- MIUR (FIRB - Futuro in Ricerca Project Nanogeneratori di ossido di zinco ad altissima efficienza per l'alimentazione di microsistemi impiantabili e di reti wireless di sensori)
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.
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