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Titolo:
SURFACE MODIFICATION OF PLATINUM THIN-FILM ELECTRODES TOWARDS A DEFINED ROUGHNESS AND MICROPOROSITY
Autore:
ASCHAUER E; FASCHING R; VARAHRAM M; JOBST G; URBAN G; NICOLUSSI G; HUSINSKY W; FRIEDBACHER G; GRASSERBAUER M;
Indirizzi:
VIENNA TECH UNIV,INST ALLGEMEINE ELEKTROTECH & ELEKTRON,GUSSHAUSSTR 27-29 A-1040 VIENNA AUSTRIA VIENNA TECH UNIV,INST ALLGEMEINE ELEKTROTECH & ELEKTRON A-1040 VIENNAAUSTRIA VIENNA TECH UNIV,LUDWIG BOLTZMANN INST BIOMED MIKROTECH & HIRNKREI A-1040 VIENNA AUSTRIA VIENNA TECH UNIV,INST ALLGEMEINE PHYS A-1040 VIENNA AUSTRIA VIENNA TECH UNIV,INST ANALYT CHEM A-1060 VIENNA AUSTRIA
Titolo Testata:
Journal of electroanalytical chemistry [1992]
fascicolo: 1-2, volume: 426, anno: 1997,
pagine: 157 - 165
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATOMIC-FORCE MICROSCOPY; BIOSENSORS; INTERFACES;
Keywords:
PLATINUM THIN FILM ELECTRODES; SURFACE MODIFICATION; ROUGHNESS; BIOSENSORS; CYCLIC VOLTAMMETRY; LASER-SECONDARY-NEUTRAL-MASS-SPECTROSCOPY; ATOMIC FORCE MICROSCOPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
E. Aschauer et al., "SURFACE MODIFICATION OF PLATINUM THIN-FILM ELECTRODES TOWARDS A DEFINED ROUGHNESS AND MICROPOROSITY", Journal of electroanalytical chemistry [1992], 426(1-2), 1997, pp. 157-165

Abstract

The roughness and microporosity of platinum thin-film electrodes, which act as transducers in electrochemical biosensors, have been varied by evaporating titanium or aluminum as top layers and subsequent annealing and etching of these metal films. This defined structural variation is very important in the field of chemo- and biosensors. The electrochemical characteristics of the electrode surface were investigated by cyclic voltammetry in 0.5 M H2SO4. From this the real electrode areawas determined by calculating the charge density in the hydrogen adsorption and desorption regions, and the roughness factor, defined as the ratio between the calculated charge density and the theoretical value of smooth polycrystalline platinum, covered a range from 1.1 to 8.85. The platinum surface was studied by cyclic voltammetry, laser-secondary-neutral-mass-spectroscopy and atomic force microscopy. (C) 1997 Elsevier Science S.A.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 22:36:11