Processi di trasporto classico e quantistico nelle nano-bio-strutture: un nuovo modello teorico e applicazioni

My doctorate thesis has the purpose to study theoretically the transport processes in nanobiostructures, like nanoparticles and nanowires, from a classical and quantum point of view. The matter is of high interest considering the continuous technological improvement, which makes possible an increasing number of devices with characteristic dimensions of few nanometers, whose electric behavior is not always explainable with the known available theoretical models. A new model is proposed, which allows to evaluate in analytical modality the velocities correlation function at temperature T, the mean square deviation of position and the diffusion coefficient D, also on extremely small temporal scales, of order of the average time among the collisions of carriers. The proposed model has been used for analyzing experimental data of the most commonly used and studied materials in such sector, i.e Zinc Oxide (ZnO), Titanium Dioxide (TiO2), Gallium Arsenide (GaAs), Silicon (Si) and "single walled" Carbon Nanotubes (SWCN). This new model doesn't require not fully physically justified parameters, as for example in the Smith model, and it offers new results (like a high initial diffusivity and initial oscillating phenomena in nanodevices also at sensoristic level), which are material of confirmation from the experimental activity.