Block copolymers have drawn increasing attention for fabricating functional nanomaterials due to their properties of
self-assembly. In particular, photonic crystals hold promise for multiple optical applications. We prepared 1D photonic
crystals with polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP) lamellar films which is hydrophobic block-hydrophilic
polyelectrolyte block polymer of 57 kg /mol-b-57 kg/mol. The lamellar stacks, which are alternating layers of
hydrophilic and hydrophobic moiety of PS-b-P2VP, are obtained by exposing the spin coated film under chloroform
vapor. The band gaps of the lamellar films interestingly varied after immersion into the quaternizing solvents containing
5wt% of iodomethane solubilized in n-hexane. We demonstrate about the influence of UV light on those photonic gel
films. To study of different properties of films, UV-visible absorption spectra were measured as a different UV
irradiation time at swollen films with distilled water. The UV-visible maximum absorption spectra shifted by UV
irradiation time. Dependent on the time of UV irradiations, we can change the photonic band gap.
Photosensitive polyimide containing 2-methoxy cinnamate was synthesized for photo-alignment layer of liquid crystals
(LCs). 2-Methoxy cinnamic acid was confirmed photo-sensitive material by linearly polarized UV light. We studied that
effect of polarized UV light on rubbed polyimide film. Anchoring energy of liquid crystal with aligning surface was
measured. Irradiation of depolarized UV light on rubbed Polyimide film suppressed effective anchoring energy. Linearly
polarized UV light on rubbed polyimide film controlled anchoring energy effectively. Polyimide film containing 2-methoxy cinnamate can control the photo-alignment layer easily due to its photo-sensitivity.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.