Dynamics on Molecular Films. Surface Plasmon Resonance Measurement for Organic Ultrathin Films.

Abstract

This paper introduces our recent results on surface plasmon resonance (SPR) measurements of organic ultrathin films such as monomolecular layers. Two examples are addressed: one is the exchange kinetics measurement of alkanethiol self-assembled monolayers (SAMs) on an Au surface by immersion of the sample in a solution of a different alkyl chain length, and the other is the investigation of an adsorption process of liquid crystal molecules by vapor deposition. These studies well demonstrate the advantage of the SPR measurement. A new optical technique for investigation of such thin films is also proposed. This technique is complementary to the SPR measurement, and is a promising method for appli- cation of small biosensors.