메뉴 건너뛰기




Volumn 20, Issue 14, 2004, Pages 5998-6004

Thin films of bicontinuous cubic mesostructured silica templated by a nonionic surfactant

Author keywords

[No Author keywords available]

Indexed keywords

LAMELLAR STRUCTURES; SMALL-ANGLE X-RAY SCATTERING;

EID: 3142746007     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la030442z     Document Type: Article
Times cited : (53)

References (78)
  • 32
    • 0011915323 scopus 로고
    • National Aeronautics and Space Administration: Washington, DC
    • Schoen, A. H. NASA Technical Note D-5541; National Aeronautics and Space Administration: Washington, DC, 1970.
    • (1970) NASA Technical Note D-5541
    • Schoen, A.H.1
  • 62
    • 3142735645 scopus 로고    scopus 로고
    • note
    • The intensities of the 211 reflections normal to the film plane (see arrows) observed in Figure 1b are relatively weak, since the incident X-ray beam was several degrees away from the Bragg condition for (211) planes oriented parallel to the film surface.
  • 69
    • 3142723922 scopus 로고    scopus 로고
    • note
    • A linear distortion in real space along a cristallographic axis of a cubic structure produces a reciprocal linear distortion of the diffraction pattern along the corresponding reciprocal space direction. The stretching required to match the predicted and experimental diffraction patterns varied from 15 to 20% depending on the exact synthesis conditions, For the pattern in Figure 1b, the stretching required was 20%.
  • 71
    • 0011376075 scopus 로고    scopus 로고
    • Tolédano, P., Figueiredo Neto, A. M., Eds.; World Scientific; Singapore
    • Holmes, M. C.; Leaver, M. S. In. Phase Transitions in Complex Fluids; Tolédano, P., Figueiredo Neto, A. M., Eds.; World Scientific; Singapore, 1998; pp 29-55.
    • (1998) Phase Transitions in Complex Fluids , pp. 29-55
    • Holmes, M.C.1    Leaver, M.S.2
  • 77
    • 3142763682 scopus 로고    scopus 로고
    • note
    • 13/silica system (at ∼60 vol % surfactant) occurs at a somewhat lower volume fraction than in the binary Brij-56/water system (∼70 vol % surfactant). This suggests that the simple approach followed here may underestimate slightly the surfactant volume fraction in the as-synthesized dip-coated film. This is likely due to the influence of the temperature at which the film is processed on the film composition. The hydrophilic content (and hence the mesostructure) of surfactant/silica films has been shown to depend on the relative humidity of the surroundings (see ref 78). As the temperature of the system is raised above room temperature, the films desorb water, thereby increasing the relative surfactant content. This favors formation of the cubic phase at lower initial surfactant content than expected, based on a consideration of the surfactant-water T-x phase diagram.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.