Large-scale protein/antibody patterning with limiting unspecific adsorption
Résumé
A simple synthetic route based on nanosphere lithography has been developed in order to design largescale nanoarray for specific control of protein anchoring. This technique based on two-dimensional
(2D) colloidal crystals composed of polystyrene spheres allows the easy and inexpensive fabrication
of large arrays (up to several centimeters) by reducing the cost. A silicon wafer coated with a thin
adhesion layer of chromium (15 nm) and a layer of Gold (50 nm) is used as a substrate. PS spheres are
deposited on the gold surface using the floating-transferring technique. The PS spheres were then
functionalized with PEG-biotin and the defects by self-assembly monolayer (SAMs) PEG to prevent
unspecific adsorption. Using epifluorescence microscopy, we show that after immersion of sample on
target protein (avidin and anti-avidin) solution, the latter are specifically located on polystyrene
spheres. Thus, these results are meaningful for exploration of devices based on large-scale nanoarray
of PS spheres and can be used for detection of target proteins or simply to pattern a surface with
specific proteins.
Domaines
Chimie
Fichier principal
Journal of Nanoparticle Research, 2017, 19, 351 .pdf (1.84 Mo)
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