[Todos] Coloquios del Departamento de Física (jueves 16/6)

[pdmitruk en df.uba.ar]

--------------------------------------------------------------------------------

                         COLOQUIOS DEL DEPARTAMENTO DE FÍSICA FCEyN - UBA

                                   http://coloquios.df.uba.ar/

                                    Charla, café y galletitas
                            En el Aula Federman, 1er piso, Pabellón I,
                                      Ciudad Universitaria


                                    Jueves 16 de junio, 14hs,


                          Nanoscience at work: imaging and manipulation
                                  at atomic and molecular scales


                                       Saw-Wai Hla

                                     Ohio University



  We combine a variety of scanning tunneling microscope (STM)  
manipulation schemes with tunneling spectroscopy techniques to image  
and manipulate properties of atoms and molecules on surfaces. This  
talk will include our recent results and achievements: In spintronic  
area, we will show that a magnetized STM tip can be used to directly  
image various spin directions of individual atoms. In molecular  
spintronics area, orbital Kondo effect of TBrPP-Co molecules generated  
by an interfacial charge transfer process will be discussed. In  
nanoscale superconductivity area, we will present the smallest  
molecular superconductor ever studied to date. Here, the finding of  
superconductivity in just four pairs of (BETS)2-GaCl4 molecules opens  
the possibility of investigating superconducting phenomena locally.  
Finally, in molecular nanomachines area, complex rotation mechanisms  
of Ru based doubled decker molecular rotors operated by injecting  
tunneling electrons from an STM tip will be presented. These  
experiments are innovative, and are tailored to address several  
critical issues covering both for fundamental understanding, and for  
demonstration of novel atom/molecule based nanodevices.