The Fluorescence Study of the Induced Adsorption Orientation of Biphenyl Derivatives on Au Colloidal Surface

Self assembled monolayers (SAMs) are surfaces on which a single layer of molecules is formed when a solution of the desired molecule is dropped onto the substrate surface. A common example for SAMs is an alkanethiol on gold which forms an ordered assembly with the alkyl chains packing together due to van der Waals forces. A variety of studies were performed on the alkanethiol on metal surfaces due to the simplicity to simulate a model system. However, alkanethiols are not adequate for the densely packed and wellordered self assembled monolayers (SAMs) due to the island formation and kink conformation. 1,2 In many cases, applications require more stable surfaces, and so designed SAMs surfaces were suggested in studies of molecular recognition, bimaterial interfaces, cell growth, crystallization, and many other systems. 3 Aromaticthiol SAMs