Superhydrophobic and White Light-Activated Bactericidal Surface Through a Simple Coating

Gi Byoung Hwang, Adnan Patir, Elaine Allan, Sean P Nair, Ivan P Parkin

ACS Appl Mater Interfaces. 2017 Aug 30;9(34):29002-29009.

PMID: 28758725

Abstract:

Bacterial adhesion and proliferation on surfaces are a challenge in medical and industrial fields. Here, a simple one-step technique is reported to fabricate self-cleaning and bactericidal surfaces. White, blue, and violet paints were produced using titanium dioxide nanoparticles, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, crystal violet, toluidine Blue O, and ethanol solution. All of the painted surfaces showed superhydrophobicity in air, and even after hexadecane oil contamination, they retained water repellency and self-cleaning properties. In an assay of bacterial adhesion, significant reductions (>99.8%) in the number of adherent bacteria were observed for all the painted surfaces. In bactericidal tests, the painted surfaces not only demonstrated bactericidal activity against Staphylococcus aureus and Escherichia coli in the dark but also induced very potent photosensitization (>4.4 log reduction in the number of viable bacteria on the violet painted surface) under white light illumination. The technique that we developed here is general and can be used on a wide range of substrates such as paper, glass, polymers, and others.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP51851377	1H,1H,2H,2H-Perfluorooctyltriethoxysilane		51851-37-7	Price