Thermodynamic control of diameter-modulated aluminosilicate nanotubes

Hoik Lee, Yangjun Jeon, Youngil Lee, Sang Uck Lee, Atsushi Takahara, Daewon Sohn

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

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 29Si 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.

Original languageEnglish
Pages (from-to)8148-8152
Number of pages5
JournalJournal of Physical Chemistry C
Volume118
Issue number15
DOIs
Publication statusPublished - Apr 17 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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