Langmuir-Blodgett film deposition with hydrophilic substrate

Figure 4.2. Langmuir-Blodgett film deposition Y-type) on a hydrophilic substrate (a) monolayer on the surface of water (b) first layer on withdrawal, (c) second layer second insertion), and d) substrate with three layers after...

Figure 4.1. Schematic diagram of the formation of a Langmuir-Blodgett film. Each amphiphilic molecule is represented by a circle with a tail, where the circle denotes the hydrophilic end of the molecule. The left hand diagram represents the deposition of a monolayer on a hydrophilic substrate moving upwards. The right hand diagram represents the deposition of a second layer during the downward movement of the substrate.

In Langmuir-Blodgett deposition (Fig. 10.24e), a film of molecules (with amphiphilic properties) is forced in a densely packed layer at a liquid-air interface or at a liquid-liquid (lipophilic/hydrophilic) interface. The substrate (submerged into the liquid beforehand) is pulled from the liquid to air to adsorb a monolayer. With this technique, the monolayer is forced into an organization by narrowing the organization area with movable sidewalls. The technique has been particular successful on molecules with liquid crystal properties [133, 87],... 

---