Atomistic simulations of superplasticity and amorphization of nanocrystalline anatase TiO2

Hot pressing of nanocrystalline TiO2 (anatase) ceramics with controlled microstructure

Deformation mechanism in nanocrystalline metals: experiments and atomistic simulations

Molecular dynamics deformation studies of nanocrystalline metals suggest a plasticity mechanism where dislocations are nucleated at grain boundaries (GB), travel through the grain being hindered by local GB stress intensities, to be finally absorbed in the surrounding GBs [1][2]. Recent constant strain rate molecular dynamics simulations of nanocrystalline Al demonstrated that dislocations can ...

Hot compaction of nanocrystalline TiO2 (anatase) ceramics. Mechanisms of densification: Grain size and doping effects

The hot compaction of nanocrystalline TiO2 anatase powders is investigated using dilatometry. The constant rate of heating (CRH) method is applied to determine effective activation energies of the processes involved during sintering. Grain size and doping effects are studied, using dopant cations of different radius and charge: Zn, Al, Si, Nb. The results are interpreted by a mechanism includin...

Thermal and photochemical reactions of methanol on nanocrystalline anatase TiO2 thin films.

The catalytic and photo-catalytic activity of well-defined anatase TiO2 nanocrystals for the partial oxidation of methanol was investigated using temperature-programmed desorption (TPD) in ultra-high vacuum in order to determine how crystallite size and shape affect reactivity. The TiO2 films used in this study were prepared from well-defined TiO2 nanocrystals synthesized by colloidal methods. ...

Electrical Properties of Nb-, Ga-, and Y-Substituted Nanocrystalline Anatase TiO2 Prepared by Hydrothermal Synthesis

TiO2 Prepared by Hydrothermal Synthesis E. Mitchell Hopper, Frédéric Sauvage,§,¶,k Aravind Kumar Chandiran, Michael Grätzel, Kenneth R. Poeppelmeier,k and Thomas O. Mason Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208 Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, Swiss Federal Institute of Technology (EPFL)...