There exist several different methods for transferring floated monolayers on the air–water interface to solid substrates. The Langmuir–Blodgett (LB) technique is among those mentioned methods that can be used to transfer a single layer or multilayer from the air–water interface to the substrate. The substrate can be a glass slide, a flexible PET film, electrodes, and other devices. In this method, first, amphiphilic molecules and nanomaterials are spread onto the surface of the water, and after compressing, using barriers, it is transferred to a substrate. Freedom in the selection of the layers' materials and structures and also substrates makes the LB deposition method a promising and powerful multipurpose technique. With this point of view, this chapter will deal with the deposition process from monolayers to multilayers in the LB deposition method. In the first part, we will briefly discuss the basic devices required for the LB film deposition. Then, the important steps for a successful LB film deposition will be reviewed. In the continuation, various LB deposition techniques with several advanced applications of LB films will be discussed.
