Optically Active Chiral DNA−Silica Hybrid Free-Standing Films
Yuanyuan Cao, Shunai Che
Chemistry of Materials
Chiral DNA–silica hybrid free-standing films (CDSFs) with antipodal handedness were fabricated via the self-assembly of DNA and a silica source in the presence of a costructure-directing agent. The scattering-based optical activity (OA) of these films across the entire visible spectrum coming from the chiral DNA supermolecular structure can easily be tuned to various narrow-band OAs by changing the absorption bands of the backgrounds or by introducing colorful chromophore molecules into the films. These films provide an extremely facile strategy for achieving OA of targeted wavelengths, which may facilitate the design of optical instruments.
Circular dichroism, Materials