Thin film of CdTeSe/ZnS quantum dots on water subphase: Thermodynamics and morphology studies

Colloidally synthesized semiconductor nanoparticles have been receiving much attention due to their potential application in the area of photovoltaics, optic devices, biology, and medicine. This work explains how semiconductor CdTeSe/ZnS quantum dots (QDs) with the surface modified by trioctylphosphine oxide (TOPO) were dispersed on the surface of water. The studies of the organization and behavior of formation layers of CdTeSe/ZnS were followed by surface pressure-area isotherm measurements, in-situ absorption spectroscopy, Brewster Angle Microscopy (BAM) and surface potential measurements. The conducted research shows that CdTeSe/ZnS QDs form a tightly-packed, thin layer at the water-air interface, which can be easily deposited on different surfaces with the Langmuir-Blodgett and Langmuir-Schafer techniques.