title: Hydrogel improved the response in the titania/graphene oxide one-dimensional photonic crystals.
abstract: Recently, one-dimensional photonic crystals (1DPCs) have attracted considerable interest because they exhibit a material-specific response profile to external stimuli. In our previous work, TiO2/GO 1DPCs, the stopbands of which can be made to span the whole visible range, were fabricated by spin-coating technique. The prepared 1DPCs have a double response to both dimethyl sulfoxide and alkali solution. However, the response is slow, insensitive, and irreversible. To improve the responsiveness of the 1DPCs, poly(ethylene glycol) (PEG)-cross-linked poly((methyl vinyl ether)-co-maleic acid) (PMVE-co-MA) hydrogels were embedded in those crystals. The results demonstrated that modified 1DPCs with different stopbands could be obtained by controlling the speed of the spin-coating technique. The prepared 1DPCs have better responsiveness to external solution pH.
authors.affiliation: State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, P. R. China.
authors.forename: Chong
authors.initials: C
authors.lastname: Yao
authors.forename: Jiaoyu
authors.initials: J
authors.lastname: Ren
authors.forename: Cihui
authors.initials: C
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Yin
authors.forename: Yanxi
authors.initials: Y
authors.lastname: Zhu
authors.forename: Liqin
authors.initials: L
authors.lastname: Ge
keywords: 1DPCs; DMSO; GO; TiO2; hydrogel; pH