Highly ordered nanostructures of liquid-crystal molecules were patterned within porous anodic alumina of different pore diameters. As the utilized pore diameter of the porous membrane decreases, progressively red-shifted emissions are observed for the embedded liquid-crystal nanostructures at room temperature. This unique spectral progression, depending on the pore size, is very similar to the emission trend induced by the thermotropic phase-transitions of the bulk antiferroelectric liquid-crystal. Such characteristics are considered to be due to structural confinement of the antiferroelectric liquid-crystal molecules within the finite size of nanoporous channels.
Bibliographical noteFunding Information:
This work was financially supported by National Research Laboratory (Grant No. M1-0302-00-0027), National R&D Project for Nano-Science and Technology (Grant No. M1-0214-00-0021), KRF (Grant No. BSRIDP0228), and Yonsei University Research Fund of 2002. We are grateful for the instrumental support from the equipment facility of CRM-KOSEF, Korea University.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics