AVS 49th International Symposium
    Biomaterials Wednesday Sessions
       Session BI-WeP

Paper BI-WeP17
Alkylsiloxane Self-assembled Monolayers on Titanium

Wednesday, November 6, 2002, 11:00 am, Room Exhibit Hall B2

Session: Biointerfaces and Surfaces II
Presenter: R.M. Lennen, Naval Surface Warfare Center
Authors: R.A. Brizzolara, Naval Surface Warfare Center
R.M. Lennen, Naval Surface Warfare Center
Correspondent: Click to Email
Preparations of self-assembled monolayers (SAMs) of alkyltrichlorosilanes on silicon wafers or glass are well documented in the literature. On the other hand, little work has been done regarding SAM formation on other hydroxylated metal surfaces and little is known about the nature of the SAM. We have investigated the adsorption of different chain lengths of alkyltrichlorosilanes with different terminal functional groups on hydroxylated titanium as a function of reaction conditions using x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and contact angle measurements. Angle-resolved XPS data was used for qualitative comparison of the vertical composition of the coatings, and the C1s/CKVV peak intensity ratio@footnote 1@ enabled the calculation of comparative average layer thicknesses of the coatings. Reaction conditions included relative humidities of less than 1% and greater than 30%, with and without oven cure, and varying immersion times of the substrate in the adsorbate solution. In the future, these self-assembled monolayers will be used to investigate biofilm adhesion as a function of critical surface tension. This will lead to the development of ultra-thin antifouling coatings for shipboard titanium heat exchanger tubes with seawater intake. This work was funded by the NSWC Carderock Division In-House Laboratory Independent Research program. @FootnoteText@ @footnote 1@ Brizzolara, R. A.; Beard, B. C.; Surf. Interface Anal., 27, 716 (1999).