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PassStat, a simple but fast, precise and versatile open source potentiostat

Abstract : This work presents 4 open source potentiostat solutions for performing accurate measurements in cyclic voltammetry and square wave voltammetry at a low price. A very simple and easy to reproduce analogic board (c.a. 10 €) was driven either by a Teensy card from the company PJRC under an Arduino/Python software solution (39 €) or by an Analog Discovery 2 device from Digilent (less than 300 €). A smartphone Bluetooth Android interface was also created to circumvent the use of a computer. We demonstrated that our scheme is suitable for measurements in classical electrochemical conditions but also to carry out experiments with ultramicroelectrodes. We could thus reach a noise resolution of less than 1 pA. Scan rates of 8000 Vs-1 with ohmic drop compensation were also achieved. The device is suitable for teaching purposes but also for experiments in a participative science context on the ground, or countries with lower financial possibilities.
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https://hal.archives-ouvertes.fr/hal-03605561
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Submitted on : Friday, March 11, 2022 - 10:32:56 AM
Last modification on : Wednesday, June 1, 2022 - 3:52:25 AM

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Mélicia Caux, Anis Achit, Kethsovann Var, Gabriel Boitel-Aullen, Daniel Rose, et al.. PassStat, a simple but fast, precise and versatile open source potentiostat. HardwareX, Elsevier, 2022, pp.e00290. ⟨10.1016/j.ohx.2022.e00290⟩. ⟨hal-03605561⟩

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