Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 21, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202202114
Keywords
Atomic Force Microscopy; Crystal Growth; Mechanophotonics; Optical Waveguide Cavity; Twisted Crystals
Categories
Funding
- SERB [CRG-2018/001551]
- UoH-IoE [RC1-003, MHRD (F11/9/2019-U3(A)]
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The research demonstrates mechanically-powered rolling locomotion of twisted microcrystals, which can rotate the output signal's polarization. These twisted crystals are formed by the self-assembly of intergrowing nanocrystalline fibres with orientation mismatch, exhibiting flexibility and specific optical properties.
We demonstrate mechanically-powered rolling locomotion of a twisted-microcrystal optical-waveguide cavity on the substrate, rotating the output signal's linear-polarization. Self-assembly of (E)-2-bromo-6-(((4-methoxyphenyl)imino)methyl)-4-nitrophenol produces naturally twisted microcrystals. The strain between several intergrowing, orientationally mismatched nanocrystalline fibres dictates the pitch lengths of the twisted crystals. The crystals are flexible, perpendicular to twisted (001) and (010) planes due to pi...pi stacking, C-H...Br, N-H...O and C-H...O interactions. The twisted crystals in their straight and bent geometries guide fluorescence along their body axes and display optical modes. Depending upon the degree of mechanical rolling locomotion, the crystal-waveguide cavity correspondingly rotates the output signal polarization. The presented twisted-crystal cavity with a combination of mechanical locomotion and photonic attributes unfolds a new dimension in mechanophotonics.
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