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Highly Ordered Inverse Opal Structures Synthesized from Shape‐Controlled Nanocrystal Building Blocks
Ist Teil von
Angewandte Chemie (International ed.), 2022-01, Vol.61 (3), p.e202111048-n/a
Auflage
International ed. in English
Ort / Verlag
Germany: Wiley Subscription Services, Inc
Erscheinungsjahr
2022
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Three‐dimensional ordered porous materials known as inverse opal films (IOFs) were synthesized using nanocrystals with precisely defined morphologies. Comprehensive theoretical and experimental studies of the volume fraction ratio and electrostatic interactions between nanocrystals and polystyrene templating particles enabled the formation of highly ordered crack‐free photonic structures. The synthetic strategy was first demonstrated using titanium dioxide (TiO2) nanocrystals of different shapes and then generalized to assemble nanocrystals of other functional materials, such as indium tin oxide and zinc‐doped ferrite. Tunable photocatalytic activity of the TiO2 IOFs, modulated through the choice of the shape of TiO2 nanocrystals in conjunction with selecting desired macroscopic features of the IOF, was further explored. In particular, enhanced activity is observed for crack‐free, highly ordered IOFs whose photonic properties can improve light absorption via the slow light effect. This study opens new opportunities in designing multi‐length‐scale porous nanoarchitectures having enhanced performance in a variety of applications.
Conditions for the co‐assembly of shape‐controlled nanocrystals and templating polystyrene spheres into crack‐free highly ordered macroporous structures preserving the functional and structural properties of the nanocrystals were determined. This opens the doors to numerous opportunities in photovoltaics, optoelectronics, and photocatalysis, the latter of which was demonstrated and optimized.