Zi² an open source software for coupling AFM and lock-in from Zurich Instruments
The Swiss company Zurich Instruments (ZI) develops specialised electronics for research laboratories. Our INL laboratory has two HF2LI “super lock-in amplifier” from ZI. These electronics are equipped with several oscillators, demodulators, PID and PLL control systems . This electronics can therefore be used for a wide range of applications in various fields .
At INL, the HF2LI are coupled to our near-field microscopes (NTMDT, Bruker and Omicron). Its LabOne interface (web interface with a USB connection) can be queried by applications (called APIs) such as Python (there are also Labview and Matlab).
In June 2020, I have conceived , proposed and supervised an IUT GEii internship to interface the data acquisition module of LabOne and a Bruker Dimension 3100 near-field microscope with Nanoscope V control electronics. The software had to be written in Python and would allow to acquire images of all internal channels without any analog/digital conversion. The result of this project is a software called Zi² written by Adrianos Sidiras Galante. This software is Open Source and published under CeCiLL-C licence. Its source code is available from the hosting company Github. It allows to image and capture all the channels of the electronics as AFM images  and synchronized with our Bruker microscope electronics. It was featured in Zurich Instruments global newsletter “Q4” in 2020 .
Since then, the software continues to evolve and will offer acquisition coupled with other types of microscopes (NTMDT / Omicron / …).
Contact: David ALBERTINI
 proportional–integral–derivative PID controller and phase lock loop PLL
 The AFM images created are in gwyddion format (open source software). (http://gwyddion.net/)