|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||2016 Functional Nanomaterials: Emerging Nanomaterials and Techniques for 3D Architectures
||Titanium Dioxide Architects Made by Amorphous Building Blocks
||Mengkun Tian, Masoud Mahjouri-Samani, Gyula Eres, Davide B. Geohegan, Gerd Duscher
|On-Site Speaker (Planned)
TiO2 nanoparticles (NPs) attract tremendous interests due to a variety of properties different from those of known bulk phases. The structures, phases, facets, shapes, and sizes are closely associated with these properties of TiO2 nanoparticles. In this research, we synthesize various types of TiO2 nanoparticles by tuning the amorphous TiO2 (a-TiO2) NPs as precursors made by pulsed laser deposition (PLD) at room temperature. The structural evolution, and growth mechanism of these NPs are systematically investigated by a group of advanced transmission electron microscopy (TEM) techniques such as monochromated electron energy-loss spectroscopy (EELS), nano beam electron diffraction (NBED), and 3rd order aberration corrected scanning transmission electron microscopy (STEM). The results show how the 0D (sub-nano) building blocks of TiO2 evolved into different architects in mesoscale by a series of modifications. This research provides us a pathway to synthesize various TiO2 architects through amorphous precursors.
Research supported by U.S. DOE BES-MSED, and performed in part at the CNMS, a DOE Office of Science User Facility.