these two species of films with the same chemical structure represented completely
different wetting behavior of water adhesion and mimicked rose petal and lotus leaf,
respectively. Both the submicropillar arrayed film and the submicrocone arrayed film
exhibited superhydrophobicity with a water contact angle (CA) value of 144.0 Æ 1.7
and 156.4 Æ 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 film consisting of
micro- and nanostructure was only 3.1 Æ 2.0
, which is as low as that of lotus leaf.
Compared to replica molding technique and inkjet printing technology used to fabricate
microstructured CLCPs, colloidal lithography technique is timesaving and can be modulated throughout etching procedure, which finely regulates the structural parameters
such as shapes and dimensions. Our work provides a new way to fabricate the CLCPs in
the size of nanoscale.
Fig. 19 (a) Schematic procedure of the fabrication of microarrayed CLCP films. (b) SEM image of
submicropillar arrayed CLCP film. (b) The shape of a water droplet on the CLCP film when it is
turned upside down, indicating its high water adhesion. (c) SEM image of the surface of submicrocone arrayed CLCP film (Zhan et al. 2015)
13 Photodeformable Liquid Crystalline Polymers (LCPs)
383
different wetting behavior of water adhesion and mimicked rose petal and lotus leaf,
respectively. Both the submicropillar arrayed film and the submicrocone arrayed film
exhibited superhydrophobicity with a water contact angle (CA) value of 144.0 Æ 1.7
and 156.4 Æ 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 film consisting of
micro- and nanostructure was only 3.1 Æ 2.0
, which is as low as that of lotus leaf.
Compared to replica molding technique and inkjet printing technology used to fabricate
microstructured CLCPs, colloidal lithography technique is timesaving and can be modulated throughout etching procedure, which finely regulates the structural parameters
such as shapes and dimensions. Our work provides a new way to fabricate the CLCPs in
the size of nanoscale.
Fig. 19 (a) Schematic procedure of the fabrication of microarrayed CLCP films. (b) SEM image of
submicropillar arrayed CLCP film. (b) The shape of a water droplet on the CLCP film when it is
turned upside down, indicating its high water adhesion. (c) SEM image of the surface of submicrocone arrayed CLCP film (Zhan et al. 2015)
13 Photodeformable Liquid Crystalline Polymers (LCPs)
383