Fundamentals of the Laser-Induced Temperature Jump Method

Fundamentals of the Laser-Induced Temperature Jump Method 

The experimental response towards the laser pulse, imder cou-lostatic conditions, is a displacement of the electrode potential from its initial value AE = E-Ei, where E is the electrode potential and Ei is the initial electrode potential (i.e., at t = 0). This potential change is essentially given by the response of the interphase. Another contribution is due to the existence of a thermodiffusion potential, between the heated solution at the surface of the electrode and the cold solution near the reference electrode, but this contribution is small trader the present experimental conditions, and will be corrected on the bases of the estimation of the thermodiffusion potential described in Appendix 1. 

The interfacial response towards the laser heating involves two main contributions  

The response of the double-layer, associated to the temperature coefficient of the double-layer potential. 

Noteworthy, the double-layer response is, in general, virtually instantaneous within the time scale of the laser-pulsed measurements. Accordingly, imder conditions where the contribution from charge-transfer processes is negligible, the laser-induced potential transients, AE, would be given by  

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