Capillary Waves in Langmuir-Blodgett Interfaces and Formation of Confined CdS Layers

Nanometer sized CdS particles can be formed by exposing cadmium arachidate Langmuir-Blodgett films to hydrogen sulphide environment. X-ray scattering studies were performed to understand the formation of these particles that exhibit the quantum confinement effect in band structure. It was observed that the CdS layers remain confined within a region of ~14 around metal interfaces in these films. The sharp interfaces and the multilayer molecular stack of the films remains intact in the process of CdS formation. Logarithmic in-plane interfacial correlation, characteristic of capillary waves on liquid surfaces, was observed in both exposed and unexposed films.