The Langmuir-Blodgett (LB)technique for the preparation of ultrathin films of various organic, metallorganic, and polymeric compounds play an increasingly important role as a means or organising molecular materials at the microscopic level. The LB technique has many potential applications in molecular electronics, non-linear optics and conducting thin films. This book presents current research from across the globe in the study of Langmuir Monolayers, including the study of thermotropic liquid crystals and binary mixtures of dichroic azo dye/liquid crystal in Langmuir and Langmuir-Blodgett films; proteo-lipidic nanostructures generated via the Langmuir-Blodgett film method; Langmuir Monolayers in biosensors; as well as adsorptive characteristics of bovine serum albumin onto cationic Langmuir Monolayers of sulfonated poly-grafted cellulose.