Victoria L. Dougherty

The University of Texas at San Antonio

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D. Marton

The University of Texas Health Science Center at San Antonio

M.K. Green

Kelly Services (United States)

Marc D. Feldman

UCLA Health

Arturo A. Ayón

The University of Texas at San Antonio

S. Porbandarwalla

The University of Texas Health Science Center at San Antonio

Randolph D. Glickman

The University of Texas Health Science Center at Houston

N. Kumar

Guru Nanak Dev University

Conor Mullens

Bruker (Canada)

Devang Patel

Virginia Commonwealth University

C. Mauli Agrawal

Indian Institute of Technology Bombay

Cooperative Institutions

The University of Texas Health Science Center at San Antonio

The University of Texas at San Antonio

The University of Texas at Austin

The University of Texas Health Science Center at Houston

University of Houston

National Institute of Standards and Technology

Budapest Institute

National Institute of Standards

Eötvös Loránd University

Institute for Particle and Nuclear Physics

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Can Phthlates Be Released From Intraocular Lenses

Investigative Ophthalmology & Visual Science (2006)

M.K. Green S. Porbandarwalla N. Kumar Victoria L. Dougherty Conor Mullens

Intraocular lenses

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Stability of Self-Assembled Monolayers on Titanium and Gold

Langmuir (2008)

Gopinath Mani Dave M. Johnson D. Marton Victoria L. Dougherty Marc D. Feldman

Methyl- and hydroxyl-terminated phosphonic acid self-assembled monolayers (SAMs) were coated on Ti from aqueous solution. Dodecyl phosphate and dodecyltrichlorosilane SAMs were also coated on Ti using solution-phase deposition. The stability of SAMs on Ti was investigated in Tris-buffered saline (TBS) at 37 °C using X-ray photoelectron spectroscopy, contact angle goniometry, and atomic force microscopy. For comparison purposes, a hydroxyl-terminated thiol SAM was coated on Au, and its stability was also investigated under similar conditions. In TBS, a significant proportion of phosphonic acid or phosphate molecules were desorbed from the Ti surface within 1 day, while the trichlorosilane SAM on Ti or thiol SAM on Au was stable for up to 7 days under similar conditions. The stability of hydroxyl-terminated phosphonic acid SAM coated Ti and thiol SAM coated Au was investigated in ambient air and ultraviolet (UV) light. In ambient air, the phosphonic acid SAM on Ti was stable for up to 14 days, while the thiol SAM on Au was not stable for 1 day. Under UV-radiation exposure, the alkyl chains of the phosphonic acid SAM were decomposed, leaving only the phosphonate groups on the Ti surface after 12 h. Under similar conditions, decomposition of alkyl chains of the thiol SAM was observed on the Au surface accompanied by oxidation of thiolates.

Thiol

Phosphonate

Self-assembled monolayer

Trichlorosilane

10.1021/la8003646

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