Periodic mesoporous silica monoliths templated by liquid crystals in complex systems

Pingyun Feng, Xianhui Bu, Galen D. Stucky, David J. Pine

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Periodic mesoporous oxides are usually synthesized from water/surfactant systems with low surfactant concentrations and 1,3,5-trimethylbenzene (TMB) has been used as a swelling agent to increase the pore size under certain conditions. The use of pre-formed liquid crystal phases as template in multicomponent systems holds promise for even larger pore sizes, large monoliths, and a high level of phase, pore size, and morphology control. Here a generalized method has been employed to prepare liquid crystal phases that subsequently act as template for the formation of periodic mesoporous silica. Once formed, liquid crystal phases persist throughout the inorganic polymerization and gelation processes and directly template the formation of inorganic mesophases. The method is applicable to a diversity of chemical compositions and offers a simultaneous control over the pore size and morphology. Synthetic variables that can be used to tune the pore size include cosurfactant chain length, cosurfactant/surfactant mass ratios, and the amount of oil. The removal of organic components leads to periodic mesoporous silica with excellent thermal and hydrothermal stability.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages164-171
Number of pages8
Volume3937
StatePublished - 2000
EventMicro- and Nano-Photonic Materials and Devices - San Jose, CA, USA
Duration: Jan 27 2000Jan 28 2000

Other

OtherMicro- and Nano-Photonic Materials and Devices
CitySan Jose, CA, USA
Period1/27/001/28/00

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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  • Cite this

    Feng, P., Bu, X., Stucky, G. D., & Pine, D. J. (2000). Periodic mesoporous silica monoliths templated by liquid crystals in complex systems. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3937, pp. 164-171). Society of Photo-Optical Instrumentation Engineers.