PassStat, a simple but fast, precise and versatile open source potentiostat. (April 2022)

• Record Type: Journal Article
• Authors: Caux, Mélicia; Achit, Anis; Var, Kethsovann; Boitel-Aullen, Gabriel; Rose, Daniel; Aubouy, Agnès; Argentieri, Sylvain; Campagnolo, Raymond; Maisonhaute, Emmanuel
• Is Part Of: HardwareX. Volume 11(2022)
• Publication Date: 2022-04
• Subjects: Potentiostat -- Cyclic voltammetry -- Square wave voltammetry -- Ultramicroelectrodes -- Open hardware -- Analytical chemistry; Scientific apparatus and instruments -- Periodicals; Laboratories -- Equipment and supplies -- Periodicals; Laboratories -- Equipment and supplies; Scientific apparatus and instruments; Periodicals; Electronic journals; 681
• DOI: 10.1016/j.ohx.2022.e00290
• Languages: English
• ISSNs: 2468-0672

Abstract

Graphical abstract: 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.