Premium
Diamond ultramicroelectrodes
Author(s) -
Foord John S.,
Hu Jingping,
Holt Katherine B.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200776329
Subject(s) - ultramicroelectrode , diamond , materials science , cyclic voltammetry , chemical vapor deposition , microcrystalline , microelectrode , electrode , ferrocene , nanotechnology , fabrication , nanocrystalline material , electrical conductor , chemical engineering , electrochemistry , composite material , chemistry , crystallography , medicine , alternative medicine , pathology , engineering
Ultramicroelectrode (UME) tips from conductive diamond were fabricated by hot filament chemical vapour deposition. By changing growth conditions, it was possible to fabricate tips with very smooth nanocrystalline coatings, or relatively rough microcrystalline deposits. Cyclic voltammetry data in ferrocene methanol solution was recorded to characterise the two types of diamond. Nanocrystalline diamond displayed inferior behaviour, both in terms of the potential window, and the background current. Two types of insulation method were studied to complete the microelectrode fabrication process. Nail varnish was found to be easiest to apply and produce the best results. Fast set epoxy produced electrodes with inferior voltammetric characteristics. Electrochemical approach curves were measured under differing conditions for the electrodes studied. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)