Template-mediated ontogenesis: A novel approach to mesomorphic materials

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Description

In this report the authors describe the methods they have developed for producing stable periodic mesoporous silica gels, thin films of mesoporous silica for sensor applications, a route to nonaqueous synthesis, and the use of various additives in controlling the pore size and structure of these materials. Mesoporous silica is formed by templating silica precursors around micelles of cationic quaternary ammonium surfactants. During the synthesis these micelles undergo a phase transition to a hexagonal, lamellar or cubic liquid crystalline state, thus imposing periodic order on the amorphous silica which occupies the interface of the hydrophilic cationic headgroups of the surfactants. ... continued below

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124 p.

Creation Information

Martin, J.E.; Anderson, M.T.; Odinek, J. & Newcomer, P. July 1, 1996.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 32 times . More information about this report can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

In this report the authors describe the methods they have developed for producing stable periodic mesoporous silica gels, thin films of mesoporous silica for sensor applications, a route to nonaqueous synthesis, and the use of various additives in controlling the pore size and structure of these materials. Mesoporous silica is formed by templating silica precursors around micelles of cationic quaternary ammonium surfactants. During the synthesis these micelles undergo a phase transition to a hexagonal, lamellar or cubic liquid crystalline state, thus imposing periodic order on the amorphous silica which occupies the interface of the hydrophilic cationic headgroups of the surfactants. The product of the bulk wet synthesis is a gel composed of micron size silica/surfactant particles, each of which consists of one or more crystalline domains of silica condensed around the surfactant template. The wet gel can then be washed and pyrolyzed to remove the surfactant template, yielding the periodic mesoporous silica product.

Physical Description

124 p.

Notes

OSTI as DE96013049

Source

  • Other Information: PBD: Jul 1996

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  • Other: DE96013049
  • Report No.: SAND--96-1497
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/266612 | External Link
  • Office of Scientific & Technical Information Report Number: 266612
  • Archival Resource Key: ark:/67531/metadc668911

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  • July 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 14, 2016, 7:08 p.m.

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Martin, J.E.; Anderson, M.T.; Odinek, J. & Newcomer, P. Template-mediated ontogenesis: A novel approach to mesomorphic materials, report, July 1, 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc668911/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.