Chiral Plasmonic Response of 2D Ti3C2Tx Flakes: Realization and Applications |
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| Authors: | A Olshtrem I Panov S Chertopalov K Zaruba B Vokata P Sajdl J Lancok J Storch V Církva V Svorcik M Kartau A S Karimullah J Vana O Lyutakov |
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| Affiliation: | 1. Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic;2. Group of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals, Czech Academy of Sciences, 165 02 Prague, Czech Republic;3. Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic;4. Department of Analytical Chemistry, University of Chemistry and Technology, 16628 Prague, Czech Republic;5. Department of Biochemistry and Microbiology, University of Chemistry and Technology, 16628 Prague, Czech Republic;6. Department of Power Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic;7. School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ UK;8. Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic |
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| Abstract: | The circularly polarized light sensitive materials response can be reached at plasmon wavelengths through the coupling of intrinsically non-chiral plasmonic nanostructure with chiral organic molecules. As a plasmonic background, the different types of metal nanoparticles of various shapes and sizes are successfully tested and an apparent circular dichroism (CD) signal is measured in both, nanoparticles suspensions and after nanoparticle immobilization in substrate. In this work, the creation of plasmon-active 2D flakes of MXenes (Ti3C2Tx) is proposed, with the apparent CD response at plasmon wavelength, through the coupling of intrinsically non-chiral flakes with helically shaped helicene enantiomers. This work provides the first demonstration of chiral and plasmon-active 2D material, which shows the absorption sensitive to light intrinsic circular polarization even in plasmon wavelengths range. The appearance of the induced CD signal is additionally confirmed by several theoretical calculations. After the experimental and theoretical confirmation of the optical chirality at plasmon wavelengths, the flakes are utilized for the polarization sensitive conversion of light to heat, as well as for polarization dependent triggering of plasmon-assisted chemical transformation. |
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| Keywords: | helicene light-to-heat conversion MXene photocatalysis plasmon chirality |
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