Antireflection coatings dispersive

Figure 16.7 Single layer antireflection coating, (a) Schematic structure and working principle (b) simulated reflectance spectrum with refractive indices of 1.52 and 1.38 for the substrate and the film, respectively (no dispersion assumed).

T. (2010) Mesoporous silica nanoparticles with remarkable stability and dispersibility for antireflective coatings. Chem. Mater, 22,12-14. 

Nanomatcrials also generate interest because of the specific properties linked to the nanometer size of the particles. Some unusual optical and electrical properties are due to a phenomenon known as quantum confinement. The large surface/volume ratio also leads to the use of some of these materials in catalysis. The excellent sintering characteristics of fine powders are useful in the fabrication of ceramics and composites. The dispersion of small particles in various solvents allows the fabrication of thin films and antireflection coatings, or improvements in the optical performance of mirrors. 

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