SEMICONDUCTOR NANOPARTICLES FOR QUANTUM DEVICES

Semiconductor nanoparticles were synthesized by exposing fatty acid sa lt Langmuir-Blodgell films to the atmosphere of H2S. The particle size s were characterized by small-angle x-ray scattering of their solution s using synchrotron radiation source at higher resolution, as it was i mpossible previously to study it with usual laboratory x-ray sources. The particle sizes were found to correspond with the demands of single -electron and quantum junctions. Semiconductor heterostructures were g rown by self-aggregation of these particles of different types. Electr ical properties of these nanostructures were studied by using STM. Vol tage-current characteristics revealed the presence of differential neg ative resistance. Measurements confirmed the formation of semiconducto r superlattices directed towards a development of new nanodevices, suc h as tunnelling diodes and semiconductor lasers.