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Signal Output of Triboelectric Nanogenerator at Oil–Water–Solid Multiphase Interfaces and its Application for Dual‐Signal Chemical Sensing
Author(s) -
Jiang Peng,
Zhang Lei,
Guo Hengyu,
Chen Chaoyu,
Wu Changsheng,
Zhang Steven,
Wang Zhong Lin
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201902793
Subject(s) - triboelectric effect , contact electrification , materials science , nanogenerator , electrostatic induction , signal (programming language) , electrode , coating , composite material , optoelectronics , nanotechnology , piezoelectricity , chemistry , computer science , programming language
A liquid–solid contact triboelectric nanogenerator (TENG) based on poly(tetrafluoroethylene) (PTFE) film, a copper electrode, and a glass substrate for harvesting energy in oil/water multiphases is reported. There are two distinctive signals being generated, one is from the contact electrification and electrostatic induction between the liquid (water/oil) and the PTFE film ( V TENG and I TENG ); and the other is from the electrostatic induction in the copper electrode by the oil/water interfacial charges (Δ V interface and I interface ), which is generated only when the liquid–solid contact TENG is inserted across the oil/water interface. The two signals show interesting opposite changing trends that the V TENG and I TENG decrease while the oil/water interfacial signals of Δ V interface and I interface increase after coating a layer of polydopamine on the surfaces of PTFE and glass via self‐polymerization. As an application of the observed phenomena, both the values of I TENG and I interface have a good linear relationship versus the natural logarithm of the concentration of the dopamine. Based on this, the first self‐powered dual‐signal detection of dopamine using TENG is demonstrated.