| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Mechanism Study of Controlled Growth of Transition Metal Oxide Nanostructures |
| Author(s) |
Haitao Zhang |
| On-Site Speaker (Planned) |
Haitao Zhang |
| Abstract Scope |
This talk summarizes our work on the mechanism study of the controlled growth of transitional metal oxide (e.g., WO3, MoO3) nanostructures. Low-temperature non-catalyst selective growth of WO3-x nanowire was realized by applying a growth theory of suppressed spontaneous nucleation. One-dimensional WO3-WS2 core-shell nanostructures were synthesized with an integrated structure-property study on individual heterostructures to reveal the structure-property relation. Fingerprint Raman features were established for a quick identification of few-layer WS2 structures guiding the optical measurements of bandgap transition with the layer thickness. The growth of MoO3 nanostructures was achieved using non-conventional catalysts of alkaline-based compounds. Lateral growth mode of nanobelts and axial growth mode of tower-like structures were discovered. Regular MoO3 nanoribbons with uniform rectangular shapes can be realized by finely tuning the growth conditions. The growth mechanism study reveals important factors affecting the growth sites, growth orientations, and growth morphology for controlled growth of different nanostructures. |