Abstract
In this paper, we propose a control system for an atomic force microscope (AFM) based on an open-source microcontroller. The system, named J3SPM, offers a low-cost and easy-to-use alternative to existing control systems. The hardware of J3SPM is composed of a data acquisition shield, which is compatible with the Arduino mega and due board and is equipped with a 24-bit resolution analog to digital converter, 16-bit resolution digital to analog converter, function generator, deflection sensor driver, and piezo driver. The control program is implemented using the Arduino integrated development environment. A graphic user interface is developed for the control system. To demonstrate the capability of the presented system, we employ J3SPM with a home-made AFM for imaging a sample with a step height of 21 nm in AC imaging mode.
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