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Titolo:
Properties of thin polystyrene-poly(2-cinnamoylethyl methacrylate) (PS-PCEMA) copolymeric coatings on gold electrodes
Autore:
Xia, SJ; Liu, G; Birss, VI;
Indirizzi:
Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada Univ Calgary CalgaryAB Canada T2N 1N4 Chem, Calgary, AB T2N 1N4, Canada
Titolo Testata:
ELECTROCHIMICA ACTA
fascicolo: 4, volume: 46, anno: 2000,
pagine: 475 - 485
SICI:
0013-4686(200012)46:4<475:POTPM(>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDE-FILMS; MONOLAYER; PALLADIUM; BEHAVIOR; KINETICS;
Keywords:
polystyrene-poly(2-cinnamoylethyl methacrylate) (PSn-PCEMA(m)) copolymer film; gold; cyclic voltammetry; transmission electron microscopy; ellipsometry; QCMB; dip-coating; coverage;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Birss, VI Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada Univ Calgary Calgary AB Canada T2N 1N4 gary, AB T2N 1N4, Canada
Citazione:
S.J. Xia et al., "Properties of thin polystyrene-poly(2-cinnamoylethyl methacrylate) (PS-PCEMA) copolymeric coatings on gold electrodes", ELECTR ACT, 46(4), 2000, pp. 475-485

Abstract

The characteristics of dip-coated polystyrene-poly(2-cinnamoylethyl methacrylate) (PSn-PCEMA(m)) copolymeric coatings on Au wire and sputtered Au (onquartz crystals) electrodes have been investigated using TEM, cyclic voltammetry, mass measurements and ellipsometry. TEM studies of PS800-PCEMA(600)films, formed from an 86% cyclopentane (CP)/14% THF solvent, without subsequent rinsing, are 70-85 nm thick and are in the form of micelles, ca. 40 nm in diameter. The coverage of Au by the PSn-PCEMA(m) micellar coating, established using cyclic voltammetry in pH 7 solutions, increases with deposition time and with the concentration of PSn-PCEMA(m) in the deposition solution. Also, the coverage is higher on smooth sputtered Au versus Au wires and for copolymers containing the greatest number of styrene units, independent of the ratio of the number of PS to PCEMA units. Rinsing the PSn-PCEMA(m) coating with the block selective solvent after coating deposition rapidlydecreases the coating density, thickness and surface coverage. An interesting feature of these coatings is that the copolymer (likely the PCEMA block) promotes the formation of a hydrous Au P-oxide film at anomolously low potentials. (C) 2000 Elsevier Science Ltd. All rights reserved.

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Documento generato il 21/10/20 alle ore 10:45:05