| AVS 57th International Symposium & Exhibition | |
| Nanometer-scale Science and Technology | Tuesday Sessions |
| Session NS-TuP |
| Session: | Nanometer-Scale Science and Technology Poster Session |
| Presenter: | F. Behafarid, University of Central Florida |
| Authors: | F. Behafarid, University of Central Florida A. Naitabdi, University of Central Florida B. Roldan, University of Central Florida |
| Correspondent: | Click to Email |
Two technologically important aspects for the applications of metal nanoparticles in the fields of catalysis, molecular electronics, and plasmonics are discussed here: (i) the influence of the nanoparticle synthesis method and support morphology on thermally-driven coarsening phenomena, (ii) the high-temperature growth of oxide nanowires with tunable width, orientation, and spacing seeded by micellar metal nanoparticles (NPs). Along those lines, a comparison of the mobility of evaporated Pt NPs supported on pristine TiO2(110) and on polymer-modified TiO2(110) and micelle-based Pt NPs is established. To gain additional insight into the NP coarsening mechanisms, simulations were conducted following the two most coarsening routes: (i) diffusion-coalescence, and (ii) Ostwald ripening. Some changes were introduced in these models to guarantee the correct temperature dependence and proper energetics in the diffusion model, and a new formulation of the critical radius in the Ostwald ripening model is introduced to satisfy the mass balance without the need to use very small time steps.
Furthermore, the growth of TiO2 nanowires at high temperature starting from micellar Au and Pt nanoparticles supported on TiO2(110) is discussed.