Comparative Study of the Binding of Concanavalin A to Self-Assembled Monolayers Containing a Thiolated alpha-Mannoside on Flat Gold and on Nanoporous Gold

We have prepared SAMs containing 8-mercaptooctyl alpha-D-mannopyranoside either as a single component or in mixed SAMs with n-octanethiol on flat gold surfaces and on nanoporous gold. Electrochemical impedance spectroscopy showed that the mixed SAMs on flat gold surfaces showed the highest Con A binding, near 1:9 solution molar ratio of thiolated alpha-mannoside to n-octanethiol, whereas those on NPG showed the highest response at 1:19 solution molar ratio of thiolated alpha-mannoside to n-octanethiol. Atomic force microscopy was employed to image the monolayers and to image the bound Con A protein. Supplemental materials are available for this article. Go to the publisher's online edition of Journal of Carbohydrate Chemistry to view the free supplemental file.