Abstract
The mechanical properties of thick-walled SiO2 nanotubes (NTs) prepared by a sol–gel method while using Ag nanowires (NWs) as templates were measured by using different methods. In situ scanning electron microscopy (SEM) cantilever beam bending tests were carried out by using a nanomanipulator equipped with a force sensor in order to investigate plasticity and flexural response of NTs. Nanoindentation and three point bending tests of NTs were performed by atomic force microscopy (AFM) under ambient conditions. Half-suspended and three-point bending tests were processed in the framework of linear elasticity theory. Finite element method simulations were used to extract Young’s modulus values from the nanoindentation data. Finally, the Young’s moduli of SiO2 NTs measured by different methods were compared and discussed.
Highlights
Hybrid silica core–shell and empty-shell nanomaterials were intensively investigated in recent time [1]
Only a few publications were dedicated to the investigation of the mechanical properties of onedimensional silica nanostructures, and even less to the ones prepared by sol–gel synthesis
Houmadi et al investigated the mechanical properties of SiO2 nanotubes (NTs), which were prepared by sol–gel synthesis using organic NT templates, by using three point bending [15]
Summary
Hybrid silica core–shell and empty-shell nanomaterials were intensively investigated in recent time [1]. Analytical solutions based on elasticity theory were used to process cantilever-beam and three-point-bending tests data, while the data from nanoindentation experiments were fitted by using finite element method (FEM) simulations and compared with the analytical models (thin shell or membrane model and Hertz model).
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