Anchoring Of Liquid Crystals On Surface-Initiated Polymeric Brushes

Brushes of poly(F-caprolactone) are grown by ring-opening polymerization from initiators immobilized on gold surfaces with nanometer-scale topography. Control of the thicknesses of the brushes can be exploited to tune the effect of the underlying nanometer-scale topography on the orientations of supported liquid crystals. Patterned brushes are prepared and imaged by using liquid crystals; thin brushes have an uniform optical texture (graphic, above) but over a critical thickness the anchoring becomes nonuniform (below).