Hexagonalization of Aluminogermanate Imogolite Nanotubes Organized into Closed-Packed Bundles

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• 作者：Mohamed Salah Amara ; St茅phan Rouzi猫re ; Erwan Paineau ; Maria Bacia-Verloop ; Antoine Thill ; Pascale Launois
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：May 1, 2014
• 年：2014
• 卷：118
• 期：17
• 页码：9299-9306
• 全文大小：421K
• 年卷期：v.118,no.17(May 1, 2014)
• ISSN：1932-7455

文摘

Imogolite nanotubes are promising building blocks for nanotechnologies with potential applications in molecular separation, molecular storage, or catalysis. We present an experimental study of the structure of germanium-based imogolite nanotubes Al₂O₃Ge(OH)₄ arranged in bundles. It combines cryo-transmission electron microscopy, infrared spectroscopy, thermogravimetric measurements, and X-ray scattering experiments. Thanks to a systematic method developed to analyze X-ray scattering diagrams as a function of the nanotube shape, single-walled germanium-based imogolite nanotubes, known as cylindrical for more than 30 years, are shown to take an hexagonal base shape when arranged in bundles. Physical and chemical properties of hexagonal imogolite nanotubes should markedly differ from those of cylindrical ones, making hexagonal basis nanotubes a 鈥渘ew鈥?member, of particular interest, of the rich family of imogolites.