writer：Yuanyuan Zhan, Jianqiang Zhao, Wendong Liu, Bai Yang, Jia Wei, and Yanlei Yu.
keywords：liquid crystal polymer, wettability, colloidal lithography, submicropillar, submicrocone
source：期刊
specific source：ACS Appl. Mater. Interfaces
Issue time：2015年

Photoresponsive cross-linked liquid crystal

polymer (CLCP) ?lms with di?erent surface topographies,

submicropillar arrays, and submicrocone arrays were fabricated

through colloidal lithography technique by modulating

di?erent types of etching masks. The prepared submicropillar

arrays were uniform with an average pillar diameter of 250 nm

and the cone bottom diameter of the submicrocone arrays was

about 400 nm, which are much smaller than previously

reported CLCP micropillars. More interestingly, these two

species of ?lms with the same chemical structure represented

completely di?erent wetting behavior of water adhesion and

mimicked rose petal and lotus leaf, respectively. Both the submicropillar arrayed ?lm and the submicrocone arrayed ?lm exhibited

superhyrophobicity with a water contact angle (CA) value of 144.0 ± 1.7° and 156.4 ± 1.2°, respectively. Meanwhile, the former

demonstrated a very high sliding angle (SA) greater than 90°, and thus, the water droplet was pinned on the surface as rose petal.

On the contrary, the SA of the submicrocone arrayed CLCP ?lm consisting of micro- and nanostructure was only 3.1 ± 2.0°,

which is as low as that of lotus leaf. Furthermore, the change on the wettability of the ?lms was also investigated under alternating

irradiation of visible light with two di?erent wavelengths, blue light and green light.