Titania Solid Thin Films Deposited by pp-MOCVD Exhibiting Visible Light Photocatalytic Activity

Susan Krumdieck, Rukmini Gorthy, Johann G. Land, Aleksandra J. Gardecka, Matthew I. J. Polson, Raphaël Boichot, Catherine M. Bishop, John V. Kennedy

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The crisis of hospital-acquired infections is driving intense interest in surface coatings that can inhibit colonization and reduce spread of pathogens to vulnerable patients. Widespread use of antibiotics and antimicrobial silver and copper has been demonstrated to trigger evolution of resistant strains of bacteria. The self-cleaning properties of TiO2 could be a breakthrough for fighting HAI outbreaks if the photocatalytic activity (PCA) can be shifted to the spectrum of indoor light, and if a robust coating could be manufactured on hospital touch surfaces. MOCVD using titanium tetraisopropoxide (TTIP) is currently the standard method for applying self-cleaning TiO2 to industrial glass. In this study, pulsed-pressure MOCVD (pp-MOCVD) was used to produce a solid coating composed of columnar microstructure anatase phase TiO2 with 200 nm diameter. This microstructure has enhanced active surface area and co-deposited amorphous carbon on the crystal surfaces. The microstructure and carbon content were studied as a function of deposition temperature, and the new TiO2 coating was demonstrated to exhibit significant PCA under standard indoor lighting.

Original languageEnglish
Article number1700578
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume215
Issue number2
Early online date11 Dec 2017
DOIs
Publication statusPublished - 24 Jan 2018

Keywords

  • photocatalytic activity
  • pp-MOCVD
  • pyrolytic carbon
  • thin solid films
  • TiO
  • visible light

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Titania Solid Thin Films Deposited by pp-MOCVD Exhibiting Visible Light Photocatalytic Activity'. Together they form a unique fingerprint.

  • Cite this

    Krumdieck, S., Gorthy, R., Land, J. G., Gardecka, A. J., Polson, M. I. J., Boichot, R., Bishop, C. M., & Kennedy, J. V. (2018). Titania Solid Thin Films Deposited by pp-MOCVD Exhibiting Visible Light Photocatalytic Activity. Physica Status Solidi (A) Applications and Materials Science, 215(2), [1700578]. https://doi.org/10.1002/pssa.201700578