Mass transport behavior of electrochemical species through plasma- polymerized thin film on platinum electrode

Atsunori Hiratsuka, Hitoshi Muguruma, Ryohei Nagata, Runa Nakamura, Kimiharu Sato, Shigeru Uchiyama, I. Karube

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)25-34
Number of pages10
JournalJournal of Membrane Science
Volume175
Issue number1
DOIs
Publication statusPublished - 2000 Aug 1
Externally publishedYes

Fingerprint

Platinum
platinum
Mass transfer
Plasmas
Thin films
Electrodes
electrodes
thin films
selectivity
Film thickness
film thickness
hexadiene
dopamine
ascorbic acid
Ascorbic acid
sensitivity
Substrates
Acetonitrile
hydrogen peroxide
Hydrogen peroxide

Keywords

  • Apparent diffusion coefficient
  • Chemically modified electrode
  • Electrochemical sensing
  • Plasma-polymerized film

ASJC Scopus subject areas

  • Filtration and Separation
  • Polymers and Plastics

Cite this

Mass transport behavior of electrochemical species through plasma- polymerized thin film on platinum electrode. / Hiratsuka, Atsunori; Muguruma, Hitoshi; Nagata, Ryohei; Nakamura, Runa; Sato, Kimiharu; Uchiyama, Shigeru; Karube, I.

In: Journal of Membrane Science, Vol. 175, No. 1, 01.08.2000, p. 25-34.

Research output: Contribution to journalArticle

Hiratsuka, Atsunori ; Muguruma, Hitoshi ; Nagata, Ryohei ; Nakamura, Runa ; Sato, Kimiharu ; Uchiyama, Shigeru ; Karube, I. / Mass transport behavior of electrochemical species through plasma- polymerized thin film on platinum electrode. In: Journal of Membrane Science. 2000 ; Vol. 175, No. 1. pp. 25-34.
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