Three-dimensional structure of a sintered macroporous silica gel

Langmuir

Volumn 17, Issue 3, 2001, Pages 619-625

  Jinnai, Hiroshi ^a,d   Nakanishi, Kazuki ^d   Nishikawa, Yukihiro ^b,d   Yamanaka, Junpei ^c,d   Hashimoto, Takeji ^d  

^a KYOTO INSTITUTE OF TECHNOLOGY   (Japan)

^b INST OF PHYS AND CHEMICAL RESEARCH   (Japan)

^c NAGOYA CITY UNIVERSITY   (Japan)

^d KYOTO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

DECOMPOSITION; FUSED SILICA; MOLECULAR STRUCTURE; MORPHOLOGY; OPTICAL MICROSCOPY; POROUS SILICON; SINTERING;

SOL-GEL TRANSITION;

SILICA GEL;

EID: 0034824803     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la000949z     Document Type: Article

References (42)

1. Nakanishi, K. J. Porous Mater. 1997, 4, 67.
2. Nakanishi, K.; Soga, N. J. Am. Ceram. Soc. 1991, 74, 2518.
3. Kaji, H.; Nakanishi, K.; Soga, N. J. Sol-Gel Sci. Technol. 1994, 3, 169.
4. Gunton, J. D.; San Miguel, M.; Sahni, P. S. Phase Transition and Critical Phenomena; Domb, C., Lebowitz, J. L., Eds.; Academic Press: New York, 1983; Vol. 8, p 269.
5. Binder, K. Spinodal Decomposition; Cahn, R. W., Haasen, P., Kramer, E. J., Ed.; VCH: Weinheim, Germany, 1990; Vol. 5, p 405.
6. Hashimoto, T. Phase Transitions 1988, 12, 47.
7. Nakanishi, K.; Minakuchi, H.; Ishizuka, N.; Soga, N.; Tanaka, N. J. Sol-Gel. Sci. Technol. 1999, 13, 163.
8. Nishi, T.; Wang, T. T.; Kwei, T. K. Macromolecules 1975, 18, 227.
9. Hashimoto, T.; Kumaki, J.; Kawai, H. Macromolecules 1983, 16, 641.
10. Bates, F. S.; Wignal, G. D.; Koehler, W. C. Phys. Rev. Lett. 1985, 55, 2425.
11. Reich, S. Phys. Lett. 1986, 114A, 90.
12. Hashimoto, T.; Takenaka, T.; Jinnai, H. J. Appl. Crystallogr. 1991, 24, 457.
13. Hung, J. S.; Goldburg, W. I.; Bjerkaas, A. W. Phys. Rev. Lett. 1974, 32, 921.
14. Chou, Y.; Goldburg, W. I. Phys. Rev. A 1979, 20, 2105.
15. Komura, S.; Furukawa, H. Dynamics of Ordering Processes in Condensed Matter; Plenum: New York, 1988.
16. Hashimoto, T.; Koga, T.; Jinnai, H.; Nishikawa, Y. Nuovo Cimento D 1998, 20, 1947.
17. Thomas, E. L.; Anderson, D. M.; Henkee, C. S.; Hoffman, D. Nature 1988, 334, 598.
18. Jinnai, H.; Nishikawa, Y.; Spontak, R. J.; Smith, S. D.; Agard, D. A.; Hashimoto, T. Phys. Rev. Lett. 2000, 84, 518.
19. Jahn, W.; Strey, R. J. Phys. Chem. 1988, 92, 2294.
20. Mallanmace, F.; Micali, N.; Trusso, S.; Chen, S. H. Phys. Rev. E 1995, 51, 5158.
21. White, W. R.; Wiltzius, P. Phys. Rev. Lett. 1995, 75, 3012.
22. Jinnai, H.; Nishikawa, Y.; Koga, T.; Hashimoto, T. Macromolecules 1995, 28, 4782.
23. Li, L.; Sosnowski, S.; Kumacheva, E.; Winnik, M. A.; Rajaram, S.; Balke, T.; Chaffey, C. E. Langmuir 1996, 12, 2141.
24. Jinnai, H.; Koga, T.; Nishikawa, Y.; Hashimoto, T.; Hyde, S. T. Phys. Rev. Lett. 1997, 78, 2248.
25. Jinnai, H.; Nishikawa, Y.; Morimoto, H.; Koga, T.; Hashimoto, T. Langmuir 2000, 16, 4380.
26. Two phases, i.e., the polymerizing TMOS-rich phase and the solvent-rich phase, are both liquid states (strictly speaking, the TMOS-rich phase is viscoelastic fluid) until the gelation takes place to fix the silica structure. The nanopore forms inside the silica skeleton in the subsequent aging process. Therefore, the surface of the silica skeleton should be smooth even below the resolution of the microscope.
27. Sato, K.; Jinnai, H.; Hashimoto, T. Manuscript in preparation.
28. van Blaaderen, A.; Vriji, A. Langmuir 1992, 8, 2921.
29. 3 was indirectly estimated.
30. Wilson, T. Confocal Microscopy; Wilson, T., Ed.; Academic Press: London, 1990; p 1.
31. Wilhelm, S. About the 3D image quality of a confocal laser scanning microscope. Diploma Thesis, Fachhochschule: Köln, Germany, 1994.
32. Jinnai, H.; Nishikawa, Y.; Chen, S. H.; Koizumi, S.; Hashimoto, T. Phys. Rev. E 2000, 61, 6773.
33. Lorensen, W. E.; Cline, H. E. Comput. Graphics SIGGRAPH'87 1987, 21, 163.
34. Nishikawa, Y.; Jinnai, H.; Koga, T.; Hashimoto, T.; Hyde, S. T. Langmuir 1998, 14, 1242.
35. 2 and F(q) ∼ ℱ[c(r)], where F(q) and c(r) are the structure amplitude and spatial distribution of the local concentration fluctuations (e.g., silica body = 1 and macropore = 0 for the silica gel, PB = 1 and DPB = 0 for the polymer mixture) in 3D. ℱ[c(r)] shows the Fourier transformation of c(r).
36. The upward deviation of S(q) of the polymer mixture in the small-q region is due to the limited area used in the FFT operation.
37. Nishikawa, Y.; Koga, T.; Jinnai, H.; Hashimoto, T. Submitted for publication.
38. Hubert, D.; Cohn-Vossen, S. Geometry and the Imagination; Chelsea Publishers: New York, 1952.
39. Jinnai, H.; Nishikawa, Y.; Hashimoto, T. Phys. Rev. E. 1999, 59, R2554.
40. Curvature distribution data of the polymer mixture at the critical composition were taken from ref 25. The mixture was heat-treated at 40°C for 1675 min.
41. Cahn, J. W. J. Chem. Phys. 1965, 42, 93.
42. Nakanishi, K.; Yamasaki, Y.; Kaji, H.; Soga, H.; Inoue, T.; Nemoto, N. J. Sol-Gel Sci. Technol. 1994, 2, 227.