TY - JOUR
T1 - Mass transport behavior of electrochemical species through plasma- polymerized thin film on platinum electrode
AU - Hiratsuka, Atsunori
AU - Muguruma, Hitoshi
AU - Nagata, Ryohei
AU - Nakamura, Runa
AU - Sato, Kimiharu
AU - Uchiyama, Shigeru
AU - Karube, I.
N1 - Funding Information:
The authors would like to thank Dr. Henrik Pedersen for his help with the editing of the manuscript. This work was partly supported by research project of Kochi University of Technology.
PY - 2000/8/1
Y1 - 2000/8/1
N2 - We propose a novel method for generating thin film coating for use on a platinum (Pt) electrode. This is accomplished by a plasma-polymerized film (PPF), which is deposited directly onto the substrate under dry condition. The resulting films are extremely thin (< 100 nm), have good adherence to the substrate (electrode), and have a highly-cross-linked network structure. The PPF-deposited Pt electrode shows a high selectivity towards targeted species without decreasing the sensitivity (i.e. maintaining a high electrical signal). This property is partly attributed to size discrimination from a highly-cross-linked network structure in the film. Moreover, an acetonitrile PPF-deposited Pt electrode showed accumulation ability for hydrogen peroxide detection; the sensitivity of the PPF-deposited electrode (30-59 nm of film thickness) is one and half times larger than that of bare electrode. Chronocoulometric data support this effect. A hexadiene PPF-deposited Pt electrode also showed high selectivity between dopamine and ascorbic acid compared with a bare Pt electrode; the selectivity ratio for PPF-deposited electrode (37 nm of film thickness) is 12, whereas that of the bare electrode is 4.6. We demonstrate and discuss mass transport behavior of electrochemical species through plasma-polymerized thin film on platinum electrode. (C) 2000 Elsevier Science B.V.
AB - We propose a novel method for generating thin film coating for use on a platinum (Pt) electrode. This is accomplished by a plasma-polymerized film (PPF), which is deposited directly onto the substrate under dry condition. The resulting films are extremely thin (< 100 nm), have good adherence to the substrate (electrode), and have a highly-cross-linked network structure. The PPF-deposited Pt electrode shows a high selectivity towards targeted species without decreasing the sensitivity (i.e. maintaining a high electrical signal). This property is partly attributed to size discrimination from a highly-cross-linked network structure in the film. Moreover, an acetonitrile PPF-deposited Pt electrode showed accumulation ability for hydrogen peroxide detection; the sensitivity of the PPF-deposited electrode (30-59 nm of film thickness) is one and half times larger than that of bare electrode. Chronocoulometric data support this effect. A hexadiene PPF-deposited Pt electrode also showed high selectivity between dopamine and ascorbic acid compared with a bare Pt electrode; the selectivity ratio for PPF-deposited electrode (37 nm of film thickness) is 12, whereas that of the bare electrode is 4.6. We demonstrate and discuss mass transport behavior of electrochemical species through plasma-polymerized thin film on platinum electrode. (C) 2000 Elsevier Science B.V.
KW - Apparent diffusion coefficient
KW - Chemically modified electrode
KW - Electrochemical sensing
KW - Plasma-polymerized film
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U2 - 10.1016/S0376-7388(00)00403-8
DO - 10.1016/S0376-7388(00)00403-8
M3 - Article
AN - SCOPUS:0034257095
SN - 0376-7388
VL - 175
SP - 25
EP - 34
JO - Jornal of Membrane Science
JF - Jornal of Membrane Science
IS - 1
ER -