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Compressibility and Structural Transformations of Aluminogermanate Imogolite Nanotubes under Hydrostatic Pressure
S Rouzière1, V Balédent1, E Paineau1
1Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405Orsay cedex, France.
Inorganic Chemistry
|January 3, 2023
Summary
Hydrostatic pressure causes structural changes in aluminogermanate nanotubes, including radial collapse of single-walled types. Young
Area of Science:
- Materials Science
- Nanotechnology
- Solid-State Chemistry
Background:
- Aluminogermanate nanotubes are novel nanomaterials with potential applications.
- Understanding their mechanical properties under pressure is crucial for material design.
Purpose of the Study:
- To investigate the structural transformations of aluminogermanate nanotubes under hydrostatic pressure.
- To determine the mechanical properties, such as axial Young's moduli, of these nanotubes.
Main Methods:
- In situ high-pressure experiments using X-ray scattering and absorption spectroscopy.
- Systematic variation of pressure up to 10 GPa.
- Analysis of structural deformations and collapse phenomena.
Main Results:
- Observed radial deformations, including ovalization and hexagonalization, depending on nanotube organization.
- Demonstrated radial collapse of single-walled nanotubes, but not double-walled ones.
- Quantified the influence of pressure-transmitting media on collapse onset pressure.
- Determined axial Young's moduli for various nanotube configurations.
Conclusions:
- Aluminogermanate nanotube structural integrity and mechanical response are sensitive to pressure and morphology.
- Single-walled nanotubes exhibit distinct pressure-induced collapse behavior compared to double-walled counterparts.
- The choice of pressure medium significantly impacts the observed collapse pressures.
