A step-by-step workflow to extract the genuine circular dichroism of thin films
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866913065886285824 |
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| author | Schölzel, Franziska Narudin, Arina Ciesielska, Aleksandra Ehm, Alexander Zahn, Dietrich R. T. van Gompel, Wouter Kahmann, Simon Salvan, Georgeta |
| author_facet | Schölzel, Franziska Narudin, Arina Ciesielska, Aleksandra Ehm, Alexander Zahn, Dietrich R. T. van Gompel, Wouter Kahmann, Simon Salvan, Georgeta |
| contents | Circular Dichroism (CD) spectroscopy has evolved from a purely solution based method towards a powerful tool in the analysis of chiral thin films. Although a straightforward technique, the genuine CD signal is often accompanied by artifacts arising from optical anisotropy and instrumental imperfections. This tutorial presents a two-step workflow that reliably isolates the orientation invariant CD response for anisotropic thin films by combining azimuthal sample rotation with sample flipping. For this purpose, a home-built sample stage was developed, which enables systematic suppression of many anisotropy-induced artifacts in commercial CD spectrophotometers. Both a detailed description of the setup itself as well as the needed python script are provided. The reliability of the workflow is demonstrated on two selected samples from different research fields: chiral molecules attached to metallic surfaces as well as metal halide perovskites incorporating chiral spacer molecules |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_24653 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A step-by-step workflow to extract the genuine circular dichroism of thin films Schölzel, Franziska Narudin, Arina Ciesielska, Aleksandra Ehm, Alexander Zahn, Dietrich R. T. van Gompel, Wouter Kahmann, Simon Salvan, Georgeta Materials Science Circular Dichroism (CD) spectroscopy has evolved from a purely solution based method towards a powerful tool in the analysis of chiral thin films. Although a straightforward technique, the genuine CD signal is often accompanied by artifacts arising from optical anisotropy and instrumental imperfections. This tutorial presents a two-step workflow that reliably isolates the orientation invariant CD response for anisotropic thin films by combining azimuthal sample rotation with sample flipping. For this purpose, a home-built sample stage was developed, which enables systematic suppression of many anisotropy-induced artifacts in commercial CD spectrophotometers. Both a detailed description of the setup itself as well as the needed python script are provided. The reliability of the workflow is demonstrated on two selected samples from different research fields: chiral molecules attached to metallic surfaces as well as metal halide perovskites incorporating chiral spacer molecules |
| title | A step-by-step workflow to extract the genuine circular dichroism of thin films |
| topic | Materials Science |
| url | https://arxiv.org/abs/2604.24653 |