Characterization of Self-Assembled Monolayers for Biosensor Applications

Autor: Nyquist, R. M., Eberhardt, A. S., Silks, L. A., III, Li, Z., Yang, X., Swanson, B. I.
Zdroj: Langmuir; February 2000, Vol. 16 Issue: 4 p1793-1800, 8p
Abstrakt: Mixed monolayers of thiol-terminated poly(ethylene glycol) (PEG) and thioacetyl GM1 glycolipid on Au(111) were examined utilizing atomic force microscopy, infrared spectroscopy, and grazing incidence X-ray diffraction to determine the composition, structure, and morphology and to characterize the specific and nonspecific interactions with protein. These monolayer architectures are robust and are readily controlled to provide a network of receptor GM1 in the PEG-terminated matrix. However, we also find significant levels of nonspecific and nonnative protein binding that render this simplistic model system unsuitable for highly sensitive biosensor device applications.
Databáze: Supplemental Index