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Silica gels with tunable nanopores through templating of the L3 phase

McGrath, K. M. ; Dabbs, D. M. ; Yao, N. ; Edler, K. J. LU orcid ; Aksay, I. A. and Gruner, S. M. (2000) In Langmuir 16(2). p.398-406
Abstract

We describe a detailed synthesis of a silicified inorgaric/organic nanoporous monolithic composite conforming to the lyotropic liquid crystalline L3 phase. The pore dimensions of the silicified L3 phase scale with the solvent volume fraction in the synthesis reaction mixture. Changing the solvent fraction in the initial solution changes the ultimate pore diameter in the silicate, providing a simple method for tuning the diameter of the pores in the matrix. The resulting monolith is optically isotropic and transparent with a nonperiodic network. Accessible pores (which permeate the entire structure) in the silicified materials correlate with the solvent domain of the original liquid crystalline phase and therefore... (More)

We describe a detailed synthesis of a silicified inorgaric/organic nanoporous monolithic composite conforming to the lyotropic liquid crystalline L3 phase. The pore dimensions of the silicified L3 phase scale with the solvent volume fraction in the synthesis reaction mixture. Changing the solvent fraction in the initial solution changes the ultimate pore diameter in the silicate, providing a simple method for tuning the diameter of the pores in the matrix. The resulting monolith is optically isotropic and transparent with a nonperiodic network. Accessible pores (which permeate the entire structure) in the silicified materials correlate with the solvent domain of the original liquid crystalline phase and therefore negate the need to remove the surfactant in order to gain access to the pore network. Measured characteristic dimensions are from 6 to well over 35 nm. X-ray scattering studies indicate a low polydispersity in the pore diameters for a given solvent fraction. Transmission electron and atomic force microscope images are consistent with a random morphology and measured surface areas exceed 960 m2 g-1 in extracted materials.

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author
; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Langmuir
volume
16
issue
2
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:0033639720
ISSN
0743-7463
DOI
10.1021/la990098z
language
English
LU publication?
no
id
1116ccce-af78-46b3-9765-13659995247d
date added to LUP
2023-05-04 18:11:57
date last changed
2025-10-14 09:50:52
@article{1116ccce-af78-46b3-9765-13659995247d,
  abstract     = {{<p>We describe a detailed synthesis of a silicified inorgaric/organic nanoporous monolithic composite conforming to the lyotropic liquid crystalline L<sub>3</sub> phase. The pore dimensions of the silicified L<sub>3</sub> phase scale with the solvent volume fraction in the synthesis reaction mixture. Changing the solvent fraction in the initial solution changes the ultimate pore diameter in the silicate, providing a simple method for tuning the diameter of the pores in the matrix. The resulting monolith is optically isotropic and transparent with a nonperiodic network. Accessible pores (which permeate the entire structure) in the silicified materials correlate with the solvent domain of the original liquid crystalline phase and therefore negate the need to remove the surfactant in order to gain access to the pore network. Measured characteristic dimensions are from 6 to well over 35 nm. X-ray scattering studies indicate a low polydispersity in the pore diameters for a given solvent fraction. Transmission electron and atomic force microscope images are consistent with a random morphology and measured surface areas exceed 960 m<sup>2</sup> g<sup>-1</sup> in extracted materials.</p>}},
  author       = {{McGrath, K. M. and Dabbs, D. M. and Yao, N. and Edler, K. J. and Aksay, I. A. and Gruner, S. M.}},
  issn         = {{0743-7463}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{2}},
  pages        = {{398--406}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Langmuir}},
  title        = {{Silica gels with tunable nanopores through templating of the L<sub>3</sub> phase}},
  url          = {{http://dx.doi.org/10.1021/la990098z}},
  doi          = {{10.1021/la990098z}},
  volume       = {{16}},
  year         = {{2000}},
}