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Updated: Feb 11, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
Pseudo-enantiomeric chiral components and formation of the helical micro- and nanostructures in charge-transfer
Jerzy J Langer1, Grzegorz Hreczycho2
1Faculty of Chemistry, Laboratory for Materials Physicochemistry and Nanotechnology, Adam Mickiewicz University in Poznań, Umultowska 89b, Poznań, 61-614, Poland.
Abstract:
Helical organic micro- and nanostructures are formed by a charge-transfer complex, cinchonidine-TCNQ. These unusual forms result from the chirality, the steric structure and specific interactions of cinchonidine molecules. These materials are semiconductors (10-4 S cm-1), with the typical absorption spectra in IR and UV-vis, but also have a characteristic of CD spectrum. Surprisingly, conductive micro and nano helices are not formed in pseudo-enantiomeric cinchonine, i.e. the complex of cinchonine and TCNQ.
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