Mechanical properties of sol-gel derived SiO2 nanotubes.
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.
Institute of Solid State Physics, University of Latvia, Kengaraga st. 8, LV-1063, Riga, Latvia.
Boris
B
Polyakov
Institute of Physics, University of Tartu, Ravila 14c, 50412, Tartu, Estonia ; Estonian Nanotechnology Competence Centre, Ravila 14c, 50412, Tartu, Estonia.
Mikk
M
Antsov
Institute of Solid State Physics, University of Latvia, Kengaraga st. 8, LV-1063, Riga, Latvia.
Sergei
S
Vlassov
Institute of Physics, University of Tartu, Ravila 14c, 50412, Tartu, Estonia ; Estonian Nanotechnology Competence Centre, Ravila 14c, 50412, Tartu, Estonia ; ITMO University, Kronverkskiy pr., 49, 197101, Saint Petersburg, Russia.
Leonid M
LM
Dorogin
Institute of Physics, University of Tartu, Ravila 14c, 50412, Tartu, Estonia ; Estonian Nanotechnology Competence Centre, Ravila 14c, 50412, Tartu, Estonia.
Mikk
M
Vahtrus
Institute of Solid State Physics, University of Latvia, Kengaraga st. 8, LV-1063, Riga, Latvia.
Roberts
R
Zabels
Institute of Physics, University of Tartu, Ravila 14c, 50412, Tartu, Estonia ; Estonian Nanotechnology Competence Centre, Ravila 14c, 50412, Tartu, Estonia.
Sven
S
Lange
Institute of Physics, University of Tartu, Ravila 14c, 50412, Tartu, Estonia ; Estonian Nanotechnology Competence Centre, Ravila 14c, 50412, Tartu, Estonia.
Rünno
R
Lõhmus
atomic force microscopy (AFM); nanomechanical tests; scanning electron microscopy (SEM); silica nanotubes