Probing nanoscale chemical segregation and surface properties of antifouling hybrid xerogel films

Langmuir : the ACS Journal of Surfaces and Colloids
Joel F DestinoFrank V Bright

Abstract

Over the past decade there has been significant development in hybrid polymer coatings exhibiting tunable surface morphology, surface charge, and chemical segregation-all believed to be key properties in antifouling (AF) coating performance. While a large body of research exists on these materials, there have yet to be studies on all the aforementioned properties in a colocalized manner with nanoscale spatial resolution. Here, we report colocalized atomic force microscopy, scanning Kelvin probe microscopy, and confocal Raman microscopy on a model AF xerogel film composed of 1:9:9 (mol:mol:mol) 3-aminopropyltriethoxysilane (APTES), n-octyltriethoxysilane (C8), and tetraethoxysilane (TEOS) formed on Al2O3. This AF film is found to consist of three regions that are chemically and physically unique in 2D and 3D across multiple length scales: (i) a 1.5 μm thick base layer derived from all three precursors; (ii) 2-4 μm diameter mesa-like features that are enriched in free amine (from APTES), depleted in the other species and that extend 150-400 nm above the base layer; and (iii) 1-2 μm diameter subsurface inclusions within the base layer that are enriched in hydrogen-bonded amine (from APTES) and depleted in the other species.

References

Sep 30, 2004·Journal of Public Health·Jean Adams, Martin White
Mar 23, 2006·Biofouling·Michelle L CarmanAnthony B Brennan
Sep 30, 2008·Journal of Pharmaceutical and Biomedical Analysis·C GendrinC Collet
Aug 20, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Zheng ZhangShaoyi Jiang
Apr 15, 2010·Biofouling·K V Thomas, S Brooks
Mar 24, 2011·Nature Communications·James A Callow, Maureen E Callow
Jan 6, 2012·Chemical Communications : Chem Comm·Clare E HarveyBert M Weckhuysen
Jan 16, 2013·Applied Spectroscopy·Rohith K ReddyRohit Bhargava
Jan 9, 2014·Accounts of Chemical Research·Michael R DettyMario Pagliaro

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Citations

Sep 9, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Joel F DestinoFrank V Bright
Jun 20, 2018·Advanced Materials·Karoline HergetWolfgang Tremel
Apr 9, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Joel F DestinoFrank V Bright
Dec 10, 2016·ACS Applied Materials & Interfaces·Alina KirillovaAlla Synytska

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