Surface relief measurements in side-chain azobenzene polyesters with different substituents

Control and Suppression of Surface Relief Gratings in Liquid‐Crystalline Perfluoroalkyl–Azobenzene Polymers

“…While in most of the previous studies of SRG formation, amorphous azobenzene polymers were used, there are only few reports on liquid-crystalline azobenzene polymers developing SRGs. Ramanujam and co-workers [17][18][19] used chromophores similar to ours to form SRGs. Because of the low absorbance at 488 nm, higher light intensities (≥ 1 W cm -2 ) were needed.…”

“…We attribute the slow SRG formation of 2b to the lower concentration of the azobenzene units in the polymer, which is consistent with other results reported in the literature. [17,23] In a further attempt to decrease the ordering of polymer 2a while at the same time maintaining the azobenzene concentration, we also synthesized a polymer with two different chromophores. The methoxy-terminated azobenzene (R = II) polymer (polymer 4), which has a similar structure to the perfluoroalkyl-azobenzene (see Fig.…”

Photoinduced optical anisotropy in new poly(amide imide)s with azobenzene units

“…Bearing all this in mind a series of new PIs with the variation of the backbone as well as variation of the substitution of the azobenzene group [14][15][16][17][18] has been synthesized and studied.…”

Photoinduced doughnut-shaped nanostructures

“…Azopolymer nanostructures are created by illumination with a laser or laser pattern, and an incoherent light from UV-lamp or LED is most frequently used for optical erasing [8]. Another related experiment was performed by illuminating the azobenzene film by a strip-like uniform light pattern formed due to the use of an optical mask [9]. Depending on the polymer architecture either peaks or trenches were observed in the illuminated strips.…”