Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1996-12-09
1999-02-02
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204413, 204415, 204416, 204434, G01N 2726
Patent
active
058659722
ABSTRACT:
A microsensor for electrochemical measurements allowing the determination of concentration or concentration profile of at least one chemical compound with small size or molecular weight, under organic, inorganic, neutral or ionic form in an aqueous environment. The microsensor comprises an array (15) of microelectrodes (16), assembled on a chip (10) supported by an isolating substrate (7), and linked with at least one conductor protected by an insulating layer to a contact allowing the connection to a measuring apparatus. The said microsensor is totally coated with an hydrophilic gel (25) which is chemically inert with respect to the chemical compound, is hydrated at a level of at least 70 %, and has a thickness superior to 10 times the size of the microelectrodes (16). And an integrated electrochemical microsystem including the microsensor.
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Analytical Chemistry vol. 66, No. 3, 1 Feb. 1994, pp. 418-423.
S.P. Kounaves: "Iridium-based Ultramicroelectrode Array Fabricated by Microlithography" Patent Abstracts of Japan vol. 12, No. 278 (P-738), 1 Aug. 1988 & JP-A-63 058149.
(Matsushita Electric Ind. Co.), 12 Mar. 1988.
Sensors and Actuators, B. Chemical, vol. B21, No. 1, Jul. 1994, Lausanne, CH pp. 33-37, XP000479669.
Belmont Cecile
Buffle Jacques
Fiaccabrino Giovanni Carlo
Koudelka-Hep Milena
Tercier Mary-Lou
Tung T.
Universite de Geneve
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