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Ion‐exchange properties of poly(L‐lysine) coatings on pyrolytic graphite electrodes
Author(s) -
Bianco Pierre,
Haladjian Jean,
Giannhndrea Sophie
Publication year - 1994
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.1140060113
Subject(s) - pyrolytic carbon , graphite , cyclic voltammetry , counterion , polyelectrolyte , electrolyte , highly oriented pyrolytic graphite , materials science , ionic strength , electrode , electron transfer , inorganic chemistry , chemical engineering , ion , chemistry , electrochemistry , organic chemistry , polymer , composite material , pyrolysis , aqueous solution , engineering
Pyrolytic graphite electrodes are coated with films of poly(L‐lysine) (PLL). The polyelectrolyte films bind multiply charged counterions. Cyclic voltammetry is used to investigate the incorporation of Fe(CN) 6 3−anions as a function of time, concentration, pH, and ionic strength. The stability of the film is studied after transfer of the PLL coatings into an electrolyte solution. The PLL‐modified pyrolytic graphite (PG) electrode proves to be very effective in facilitating electron transfers of negatively charged proteins, such as ferredoxin and hydrogenase.