OBSERVATION OF ROOM-TEMPERATURE MONO-ELECTRON PHENOMENA ON NANOMETER-SIZED CDS PARTICLES

A STM study of ultra-small cadmium sulphide particles formed in a bila yer of cadmium arachidate exposed to a hydrogen sulphide atmosphere is reported. Particles of nanometre size were identified as negative fea tures inside the film after the reaction. Voltage-current characterist ics of particles of different apparent sizes were measured by means of the microscope probe. The behaviour of the tunnelling current indicat es the occurrence of a Coulomb staircase at room temperature and revea ls a new phenomenon which shows the appearance of regions with negativ e resistance.