Photothermal tuning of microparticle diffusion anisotropy in nematic lyotropic chromonic liquid crystal

[2507.10147] Photothermal tuning of microparticle diffusion anisotropy in nematic lyotropic chromonic liquid crystal Skip to main content Search Submit Donate Log in Condensed Matter > Soft Condensed Matter arXiv:2507.10147 (cond-mat) [Submitted on 14 Jul 2025 ( v1 ), last revised 26 Aug 2026 (this version, v2)] Title: Photothermal tuning of microparticle diffusion anisotropy in nematic lyotropic chromonic liquid crystal Authors: Patrycja Kadzialka , Lech Sznitko , Pawel Karpinski View PDF Abstract: We report a photothermal approach to dynamically tuning the anisotropic diffusion of microparticles suspended in a lyotropic chromonic liquid crystal (LCLC) consisting of a 30 % aqueous solution of Sunset Yellow (SSY). By switching the illumination spectrum between non-absorbing (red) and strongly absorbing (blue) regimes matching the H-aggregate absorption bands of SSY, we demonstrate a significant enhancement in both overall particle mobility and directional diffusion anisotropy (Dx/Dy). While off-resonance illumination yields a standard anisotropy ratio of 3.0, resonant blue-light exposure drives a preferential unbinding along the molecular stacks, elevating the anisotropy ratio to 5.5. This light-dependent diffusion anisotropy offers a straightforward framework for optically controlled microfluidic sorting and active soft matter assembly. Subjects: Soft Condensed Matter (cond-mat.soft) Cite as: arXiv:2507.10147 [cond-mat.soft] (or arXiv:2507.10147v2 [cond-mat.soft] for this version) https://doi.org/10.48550/arXiv.2507.10147 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Pawel Karpinski [ view email ] [v1] Mon, 14 Jul 2025 10:50:13 UTC (813 KB) [v2] Wed, 26 Aug 2026 11:07:37 UTC (644 KB) Full-text links: Access Paper: View PDF view license Current browse context: cond-mat.soft < prev | next > new | recent | 2025-07 Change to browse by: cond-mat References & Citations SciX Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) IArxiv recommender toggle IArxiv Recommender ( What is IArxiv? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab)

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