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Preparation and characterization of band nanoelectrodes made of carbonized polyacrylonitrile films
Author(s) -
Wang Joseph,
Brennsteiner Albert,
Sylwester Alan P.,
Renschler Clifford L.
Publication year - 1991
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140030610
Subject(s) - polyacrylonitrile , carbonization , materials science , electrolyte , characterization (materials science) , electrode , fabrication , conductivity , carbon fibers , chemical engineering , nanotechnology , horizontal scan rate , cyclic voltammetry , composite material , polymer , chemistry , electrochemistry , scanning electron microscope , medicine , alternative medicine , pathology , composite number , engineering
We describe the fabrication and characterization of new nanoband electrodes, based on ultrathin carbon films produced by carbonization of deposited polyacrylonitrile. Because of their controlled thickness (down to molecular dimensions) and high electrical conductivity, such electrodes show great promise for electroanalytical work. Sigmoidal voltammograms, characteristic of nonlinear diffusion, are obtained. Direct measurements in electrolyte‐free organic media are illustrated. Effects of band thickness, scan rate, solute and electrolyte concentrations, and other variables are explored. These films and other forms of carbon from polyacrylonitrile present opportunities for a wide range of electrode materials.