Chiral templating of self-assembling nanostructures by circularly polarized light [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2014.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 66-72 : digital, PDF file
- Additional Creators:
- United States. Department of Energy. Office of Basic Energy Sciences and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Chemical reactions affected by spin angular momenta of circularly polarized photons are rare and display low enantiomeric excess. High optical and chemical activity of nanoparticles (NPs) should facilitate the transfer of spin angular momenta of photons to nanoscale materials but such processes are unknown. Here we demonstrate that circularly polarized light (CPL) strongly affects self-assembly of racemic CdTe NPs. Illumination of NP dispersions with right- and left-handed CPL induces the formation of right- and left-handed twisted nanoribbons, respectively. Enantiomeric excess of such reactions exceeds 30% which is ~10 times higher than other CPL-induced reactions. Illumination with linearly polarized light and assembly in the dark led to straight nanoribbons. The mechanism of “templation” of NP assemblies by CPL is associated with selective photoactivation of chiral NPs and clusters followed by their photooxidation. Chiral anisotropy of interactions translates into chirality of the assembled ribbons. Lastly, the ability of NPs to retain polarization information, or the “imprint” of incident photons opens new pathways for the synthesis of chiral photonic materials and allows for better understanding of the origins of biomolecular homochirality.
- Report Numbers:
- E 1.99:1347139
- Published through SciTech Connect.
Nature Materials 14 1 ISSN 1476-1122 AM
Jihyeon Yeom; Bongjun Yeom; Henry Chan; Kyle W. Smith; Sergio Dominguez-Medina; Joong Hwan Bahng; Gongpu Zhao; Wei -Shun Chang; Sung -Jin Chang; Andrey Chuvilin; Dzmitry Melnikau; Andrey L. Rogach; Peijun Zhang; Stephan Link; Petr Kral; Nicholas A. Kotov.
Univ. of Michigan, Ann Arbor, MI (United States)
- Funding Information:
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