Seminar Series

Continuum model for columnar morphologies

Speaker

Ethan Huang

Institute

Department of Mechanical Engineering, University of Canterbury

Time & Place

Mon, 03 Feb 2020 10:15:00 NZDT in E12 (Lecture Theatre), Engineering CORE

All are welcome

Abstract

In thin film applications, columnar morphology usually gives rise to special symmetry-breaking material properties, such as superconductive, photocatalytic, optical and ferromagnetic properties. Some characterisations of these morphologies are not readily accessible by experimental techniques. In the AEMS lab at UC, Titania thin films fabricated by chemical vapour deposition (CVD) has demonstrated promising photocatalytic properties [1]. It is desired, for the target application and of practical interest, to index the exposed surfaces. Modelling work employing energy minimising calculations and gas-phase dynamics has undertaken to unravel the special columnar morphology (Figure Left) as well as the nature of its exposed surfaces (Figure Right). The detailed analysis helps to explain the origin of the excellent photocatalytic property of the thin film.

Mech Eng Seminar, Ethan Huang


[1] Krumdieck et al. Nanostructured TiO2 anatase-rutile-carbon solid coating with visible light antimicrobial activity. Sci Rep 9, 1883 (2019)

Biography

Ethan is a PhD candidate working closely with experimentalists in a big research group that makes antimicrobial thin films using CVD. He has been focusing on the modelling aspects of the project.

Yicun Huang, PhD, Mech Eng