Lateral force microscopy investigation of bacteriorhodopsin adsorption onto mixed self-assembled monolayers

The chemically distinctive domains of mixed self-assembled monolayers (SAMs ) were investigated by lateral force microscopy (LFM). Mixed SAMs were form ed onto the silver coated Si-wafers by soaking them into the ethanolic solu tion of 11-aminoundecanoic acid (H2(N)(CH2)(10)COOH) and undecanoic acid (C H3(CH2)(9)COOH). Based on the LFM images, it was found that the distinctive domains were formed due to the different functional groups. The prepared m ixed SAMs were used as a template for the adsorpton of bacteriorhodops in ( bR). It is concluded that site-directed adsorption of the protein molecules would he possible by using the mixed SAMs containing different functional groups.