title: Direct electrochemistry of Shewanella loihica PV-4 on gold nanoparticles-modified boron-doped diamond electrodes fabricated by layer-by-layer technique.
abstract: Microbial Fuel Cells (MFCs) are robust devices capable of taping biological energy, converting pollutants into electricity through renewable biomass. The fabrication of nanostructured electrodes with good bio- and electrochemical activity, play a profound role in promoting power generation of MFCs. Au nanoparticles (AuNPs)-modified Boron-Doped Diamond (BDD) electrodes are fabricated by layer-by-layer (LBL) self-assembly technique and used for the direct electrochemistry of Shewanella loihica PV-4 in an electrochemical cell. Experimental results show that the peak current densities generated on the Au/PAH multilayer-modified BDD electrodes increased from 1.25 to 2.93 microA/cm(-2) as the layer increased from 0 to 6. Different cell morphologies of S. loihica PV-4 were also observed on the electrodes and the highest density of cells was attached on the (Au/PAH)6/BDD electrode with well-formed three-dimensional nanostructure. The electrochemistry of S. loihica PV-4 was enhanced on the (Au/PAH)4/BDD electrode due to the appropriate amount of AuNPsand thickness of PAH layer.
authors.affiliation: State Key Laboratory of Bioelectronics, Biological Science and Medical Engineering Department, Southeast University, Nanjing 210096, P. R. China.
authors.forename: Wenguo
authors.initials: W
authors.lastname: Wu
authors.forename: Ronggang
authors.initials: R
authors.lastname: Xie
authors.forename: Linling
authors.initials: L
authors.lastname: Bai
authors.forename: Zuming
authors.initials: Z
authors.lastname: Tang
authors.forename: Zhongze
authors.initials: Z
authors.lastname: Gu
mesh_terms: D001674:Bioelectric Energy Sources; D001895:Boron / Q000737:chemistry*; D018130:Diamond / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D020592:Shewanella / Q000737:chemistry*
chemical_list: D006046:Gold; D018130:Diamond; D001895:Boron