Thermally driven stability of octadecylphosphonic acid thin films grown on SS316L.

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Min Soo LimEllen S Gawalt

Abstract

Stainless steel 316L is widely used as a biomedical implant material; however, there is concern about the corrosion of metallic implants in the physiological environment. The corrosion process can cause mechanical failure due to resulting cracks and cavities in the implant. Alkyl phosphonic acid forms a thin film by self-assembly on the stainless steel surface and this report conclusively shows that thermal treatment of the octadecylphosphonic acid (ODPA) film greatly enhances the stability of the ODPA molecules on the substrate surface. AFM images taken from the modified substrates revealed that thermally treated films remain intact after methanol, THF, and water flushes, whereas untreated films suffer substantial loss. Water contact angles also show that the hydrophobicity of thermally treated films does not diminish after being incubated in a dynamic flow of water for a 3-hour period, whereas the untreated film becomes increasingly hydrophilic due to loss of ODPA. IR spectra taken of both treated and untreated films after water and THF flushes show that the remaining film retains its initial crystallinity. A model is suggested to explain the stability of ODPA film enhanced by thermal treatment. An ODPA molecule is physisorbe...Continue Reading

References

Sep 1, 1992·Journal of Biomedical Materials Research·M Taira, E P Lautenschlager
Mar 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·H-Y NieN S McIntyre
Jul 1, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Michael P DanahyJeffrey Schwartz
Jan 25, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Anil MahapatroC Mauli Agrawal
Jul 13, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Aparna RamanEllen S Gawalt
Sep 6, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Nina AddenHenning Menzel
Jan 31, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Min Soo LimAaron T Timperman
Feb 3, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Aparna Raman, Ellen S Gawalt
Sep 4, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Rosalynn Quiñones, Ellen S Gawalt

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Citations

May 18, 2012·Analytical Chemistry·Giuseppe Arrabito, Bruno Pignataro
Jan 2, 2013·ACS Applied Materials & Interfaces·Jian ZhongDannong He
Sep 8, 2010·Nature Nanotechnology·Aaron Hernandez-Santana, Duncan Graham
May 5, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Alexandra OstapenkoGregor Witte
Jul 17, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Fei Hua LiNicolas A Melosh

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