Langmuir-Blodgett (LB) is a technique used to create thin films of materials at the molecular level. It involves spreading a liquid containing molecules on the surface of water, where they arrange themselves into a monolayer. This layer can then be transferred onto a solid substrate by lowering the substrate into the water, allowing for precise control over the film's thickness and composition. The LB method is significant in various fields, including materials science, nanotechnology, and biotechnology. It enables the fabrication of organized structures that can enhance the properties of materials, such as conductivity, optical characteristics, and chemical reactivity.