Thermodynamic Control of Diameter-Modulated Aluminosilicate Nanotubes
- Authors
- Lee, Hoik; Jeon, Yangjun; Lee, Youngil; Lee, Sang Uck; Takahara, Atsushi; Sohn, Daewon
- Issue Date
- Apr-2014
- Publisher
- American Chemical Society
- Citation
- Journal of Physical Chemistry C, v.118, no.15, pp 8148 - 8152
- Pages
- 5
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Journal of Physical Chemistry C
- Volume
- 118
- Number
- 15
- Start Page
- 8148
- End Page
- 8152
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/23265
- DOI
- 10.1021/jp411725z
- ISSN
- 1932-7447
1932-7455
- Abstract
- The diameter of imogolite nanotubes was regulated by altering the synthesis temperature and was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and Si-29 cross-polarization magic angle spinning nuclear magnetic resonance (CP-MAS NMR). Imogolite diameter modulation via thermodynamic control was induced by curvature formation of the proto-imogolite cluster, which was dependent on the degree of silanol (SiOH) substitution. At lower temperature, 323 K, the amount of SiOH substitution in the proto-imogolite clusters decreases and accordingly reduces the hydrogen bonding among SiOH substituents. In contrast, at higher temperature, 371 K, the large amount of SiOH substitution in the proto-imogolite clusters increases the hydrogen bonding among silanol groups, which also increases the degree of the curvature. The proto-imogolite clusters with a larger curvature can quickly create tubular structures by forming a circle with a smaller diameter.
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