title: Effective control of bioelectricity generation from a microbial fuel cell by logical combinations of pH and temperature.
abstract: In this study, a microbial fuel cell (MFC) with switchable power release is designed, which can be logically controlled by combinations of the most physiologically important parameters such as "temperature" and "pH." Changes in voltage output in response to temperature and pH changes were significant in which voltage output decreased sharply when temperature was lowered from 30°C to 10°C or pH was decreased from 7.0 to 5.0. The switchability of the MFC comes from the microbial anode whose activity is affected by the combined medium temperature and pH. Changes in temperature and pH cause reversible activation-inactivation of the bioanode, thus affecting the activity of the entire MFC. With temperature and pH as input signals, an AND logic operation is constructed for the MFC whose power density is controlled. The developed system has the potential to meet the requirement of power supplies producing electrical power on-demand for self-powered biosensors or biomedical devices.
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China ; Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China.
authors.forename: Jiahuan
authors.initials: J
authors.lastname: Tang
authors.affiliation: College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Liu
authors.affiliation: Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China.
authors.forename: Li
authors.identifier: 0000-0001-6231-322X
authors.initials: L
authors.lastname: Zhuang
mesh_terms: D001674:Bioelectric Energy Sources / Q000382:microbiology*; D004560:Electricity; D004566:Electrodes / Q000382:microbiology*; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D045302:Geobacter / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D013696:Temperature
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