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- W1975923100 abstract "Le bruit électrique d'une membrane épaisse au collodion a été étudié à l'équilibre thermodynamique, en absence de champ électrique imposé et de grandient ionique. Une méthode de détermination de la résistance et de la capacité de l'ensemble membrane-electrolyte-électrodes est exposée. D'autre part, une exploration systématique (à temperature constante de 25°C) en fonction de la concentration en électrolyte NaCl et de la fréquence de bruit, nous a amenés à la mise en évidence d'un bruit en 1/v d'interface prédominant. Ce bruit ayant pour origine les interfaces membrane/électrolyte est analysé égard à sa densité spectrale et aux composantes R et C du circuit paralléle équivalent. L'un des points essentiels de ce travail consiste en la mise en relief du rǒle joué par la résistance d'interface membrane/électrolyte dont le bruit émis varie en v−α; ce bruit est modulé par la capacité d'interface. Ainsi, il apparaǐt que la membrane elle-měme posséde un caractére passif lorsque l'on se trouve dans les conditions d'équilibre thermodynamique citées. The voltage noise spectrum of a thick collodion membrane has been studied at thermodynamical equilibrium, in absence of any external applied electric field, from 0.3 kHz to 20 kHz. A new method for the equivalent resistance and capacity of the membrane-electrolyte-electrode system is proposed. At constant temperature (25°C) for several NaCl concentrations, we have observed a v−1 behaviour for the noise, mainly due to an interface effect. Therefore, the noise spectral density and the R and C equivalents deduced. This work essentially shows the large effect of the membrane/electrolyte interface whose noise resistance is characterized by a v−α behaviour and is modulated by an interface capacity. It therefore occurs that, in these thermodynamical equilibrium condition, the membrane is in a passive form." @default.
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- W1975923100 date "1979-09-01" @default.
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- W1975923100 title "Bruit electrique d'une membrane au collodion—effets d'interface" @default.
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- W1975923100 doi "https://doi.org/10.1016/0013-4686(79)87090-5" @default.
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