Premium
Preparation of Tip‐Protected Poly(oxyphenylene) Coated Carbon‐Fiber Ultramicroelectrodes
Author(s) -
ElGiar Emad ElDeen M.,
Wipf David O.
Publication year - 2006
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.200603637
Subject(s) - scanning electrochemical microscopy , materials science , electrode , amperometry , electrochemistry , deposition (geology) , ultramicroelectrode , fiber , polymer , inert , chemical engineering , matrix (chemical analysis) , analytical chemistry (journal) , nanotechnology , composite material , cyclic voltammetry , chemistry , chromatography , organic chemistry , paleontology , sediment , engineering , biology
A high‐yield, reliable, and reproducible method has been successfully developed to fabricate poly(oxyphenylene)‐coated carbon fiber ultramicroelectrodes (POCF UMEs) with tip radii r <2 μm. During the insulation process, the tip of the electrochemically etched electrode is protected by inserting it into an inert polymer while the remainder of the electrode is insulated by electrochemical deposition of a 1–3 μm thick poly(oxyphenylene) film. Optimum conditions for poly(oxyphenylene) deposition are developed and the resulting carbon fiber UMEs showed good cyclic voltammetric behavior even after storage for more than one year. These UMEs were tested for use as amperometric scanning electrochemical microscopy (SECM) tips and successfully imaged Au/Kel‐F and Al/SiC p metal matrix composites.