Optical materials based on molecular nano/microcrystals and ultrathin films

[摘要] Methodologies that we developed recently for the fabrication of molecular crystals with size variation in the nano to micro regime and polyelectrolyte templated mono and multilayer Langmuirâ€�?�Blodgett films, are reviewed. The electronic absorption and strong fluorescence in the molecular nano/microcrystals are found to be size-dependent. Crystal structure and computational investigations provide a unified model to explain these observations. Role of polyelectrolyte templating in achieving stable and enhanced optical second harmonic generation response from LB films based on a hemicyanine amphiphile is highlighted.

[学科分类] 材料工程

[关键词] Molecular nano/microcrystals;aggregate fluorescence;Langmuirâ€�?�Blodgett film;polyelectrolyte;second harmonic generation.