Thermodynamic Control of Diameter-Modulated Aluminosilicate Nanotubes
- Title
- Thermodynamic Control of Diameter-Modulated Aluminosilicate Nanotubes
- Author
- 손대원
- Keywords
- ALUMINOGERMANATE NANOTUBES; ALUMINUM SILICATE; OXIDE NANOTUBES; IMOGOLITE; POLYMER; GROWTH; MOLECULES
- Issue Date
- 2014-04
- Publisher
- Amer Chemical SOC
- Citation
- The Journal of Physical Chemistry Part C, 2014, 118(15), P.8148-8152
- 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.
- URI
- https://pubs.acs.org/doi/10.1021/jp411725z
- ISSN
- 1932-7447
- DOI
- 10.1021/jp411725z
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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