Open AccessApplication of Electrochemical Impedance for Characterising Arrays of Bi2S3 Nanowires
Author(s) -
Gunta Kunakova,
Juris Katkevics,
Artūrs Vīksna,
Zanda Gertnere,
Justin M. Varghese,
Justin D. Holmes,
Donāts Erts
Publication year - 2015
Publication title -
electrochimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 236
eISSN - 1873-3859
pISSN - 0013-4686
DOI - 10.1016/j.electacta.2015.04.021
Subject(s) - nanowire , dielectric spectroscopy , materials science , electrolyte , membrane , electrochemistry , porosity , nanotechnology , aluminium oxide , scanning electron microscope , electrical impedance , current density , anode , analytical chemistry (journal) , chemical engineering , electrode , composite material , chemistry , biochemistry , physics , engineering , quantum mechanics , chromatography , electrical engineering
Electrochemical Impedance Spectroscopy (EIS) was used to characterise the electrical properties of bismuth sulphide (Bi2S3) nanowires (NWs) templated within anodic aluminium oxide (AAO) membranes. A specially engineered cell, with a nominal electrolyte volume of 0.1–0.2 ml, was used to hold and measure the electrochemical impedance of the fragile NW/AAO samples. An equivalent circuit model was developed to determine the filling density of nanowires within the porous templates. The EIS method can be utilised to probe the nanowire filling density in porous membranes over large sample areas, which is often unobtainable using electron microscopy and conductive atomic force microscopy techniques
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