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High‐Performance Respiration‐Based Biocell Using Artificial Nanochannel Regulation
Author(s) -
Zhang Qianqian,
Li Xiulin,
Chen Yang,
Zhang Qian,
Liu Huixue,
Zhai Jin,
Yang Xiaoda
Publication year - 2017
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.201606871
Subject(s) - electron transport chain , electrolyte , materials science , electrode , proton , electron , electron transfer , electrochemical gradient , biophysics , proton transport , chemical physics , transmembrane protein , respiration , membrane , nanotechnology , chemical engineering , chemistry , photochemistry , biology , physics , biochemistry , receptor , botany , quantum mechanics , engineering
Based on electron and proton transfer events occurring in biological respiration, a mitochondria‐based biocell is constructed by combining with artificial nanochannels. In this biocell, mitochondria transfer electrons to the working electrode and pump protons into the electrolyte through the tricarboxylic acid cycle. The nanochannels provide passages for protons to transport along the transmembrane concentration gradient to consume electrons on the counter electrode, forming a continuous and stable current. Furthermore, the proton transmembrane transport behavior could be modulated by regulating the permeability area and surface charge of nanochannels. A high‐performance biocell is obtained when equipped with the optimized nanochannels, which produces a current of ≈3.1 mA cm −2 , a maximum power of ≈0.91 mW cm −2 , and a lifetime over 60 h. This respiratory‐based biocell shows great potential for the efficient utilization of bioelectricity.