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Mesoporous Silica Formation Mechanisms Probed Using Combined Spin-Echo Modulated Small-Angle Neutron Scattering (SEMSANS) and Small-Angle Neutron Scattering (SANS)

Schmitt, Julien LU ; Zeeuw, Jan Joost ; Plomp, Jeroen ; Bouwman, Wim G. ; Washington, Adam L. ; Dalgliesh, Robert M. ; Duif, Chris P. ; Thijs, Michel A. ; Li, Fankang and Pynn, Roger , et al. (2020) In ACS Applied Materials and Interfaces 12(25). p.28461-28473
Abstract

The initial formation stages of surfactant-templated silica thin films which grow at the air-water interface were studied using combined spin-echo modulated small-angle neutron scattering (SEMSANS) and small-angle neutron scattering (SANS). The films are formed from either a cationic surfactant or nonionic surfactant (C16EO8) in a dilute acidic solution by the addition of tetramethoxysilane. Previous work has suggested a two stage formation mechanism with mesostructured particle formation in the bulk solution driving film formation at the solution surface. From the SEMSANS data, it is possible to pinpoint accurately the time associated with the formation of large particles in solution that go on to form the film... (More)

The initial formation stages of surfactant-templated silica thin films which grow at the air-water interface were studied using combined spin-echo modulated small-angle neutron scattering (SEMSANS) and small-angle neutron scattering (SANS). The films are formed from either a cationic surfactant or nonionic surfactant (C16EO8) in a dilute acidic solution by the addition of tetramethoxysilane. Previous work has suggested a two stage formation mechanism with mesostructured particle formation in the bulk solution driving film formation at the solution surface. From the SEMSANS data, it is possible to pinpoint accurately the time associated with the formation of large particles in solution that go on to form the film and to show their emergence is concomitant with the appearance of Bragg peaks in the SANS pattern, associated with the two-dimensional hexagonal order. The combination of SANS and SEMSANS allows a complete depiction of the steps of the synthesis that occur in the subphase.

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publishing date
type
Contribution to journal
publication status
published
keywords
kinetics, mesophase, mesoporous silica, micelles, particles, silica films, small-angle neutron scattering (SANS), spin-echo modulated small-angle neutron scattering (SEMSANS)
in
ACS Applied Materials and Interfaces
volume
12
issue
25
pages
13 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85087110467
  • pmid:32330001
ISSN
1944-8244
DOI
10.1021/acsami.0c03287
language
English
LU publication?
no
additional info
Publisher Copyright: © 2020 American Chemical Society.
id
7cbc0f43-2e14-4f94-8764-ab9e0ee5248f
date added to LUP
2022-07-12 15:58:40
date last changed
2024-06-26 18:55:39
@article{7cbc0f43-2e14-4f94-8764-ab9e0ee5248f,
  abstract     = {{<p>The initial formation stages of surfactant-templated silica thin films which grow at the air-water interface were studied using combined spin-echo modulated small-angle neutron scattering (SEMSANS) and small-angle neutron scattering (SANS). The films are formed from either a cationic surfactant or nonionic surfactant (C<sub>16</sub>EO<sub>8</sub>) in a dilute acidic solution by the addition of tetramethoxysilane. Previous work has suggested a two stage formation mechanism with mesostructured particle formation in the bulk solution driving film formation at the solution surface. From the SEMSANS data, it is possible to pinpoint accurately the time associated with the formation of large particles in solution that go on to form the film and to show their emergence is concomitant with the appearance of Bragg peaks in the SANS pattern, associated with the two-dimensional hexagonal order. The combination of SANS and SEMSANS allows a complete depiction of the steps of the synthesis that occur in the subphase.</p>}},
  author       = {{Schmitt, Julien and Zeeuw, Jan Joost and Plomp, Jeroen and Bouwman, Wim G. and Washington, Adam L. and Dalgliesh, Robert M. and Duif, Chris P. and Thijs, Michel A. and Li, Fankang and Pynn, Roger and Parnell, Steven R. and Edler, Karen J.}},
  issn         = {{1944-8244}},
  keywords     = {{kinetics; mesophase; mesoporous silica; micelles; particles; silica films; small-angle neutron scattering (SANS); spin-echo modulated small-angle neutron scattering (SEMSANS)}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{25}},
  pages        = {{28461--28473}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Materials and Interfaces}},
  title        = {{Mesoporous Silica Formation Mechanisms Probed Using Combined Spin-Echo Modulated Small-Angle Neutron Scattering (SEMSANS) and Small-Angle Neutron Scattering (SANS)}},
  url          = {{http://dx.doi.org/10.1021/acsami.0c03287}},
  doi          = {{10.1021/acsami.0c03287}},
  volume       = {{12}},
  year         = {{2020}},
}