CONTROLLING PHOTOEMISSION WITH MAGNET AND SPIN INJECTION WITH LIGHT- THE ROLE OF THE CHIRAL MOLECULES

The effects of light on the injection of electrons with aligned spin are highly invigorating and were observed not only in artificial systems but also in living organisms. In line with this interesting phenomenon we report on light induced and spin-dependent charge transfer process through helical oligopeptide-CdSe nanoparticles (NPs) architectures engineered over soft ferromagnetic substrates with small coercive force (~ 100-200 Oe). Chirality induced spin dependent phenomena were probed by two different methods, spin controlled electrochemichemistry and photoluminescence (PL) at room. We observed spin filtering through the novel organic-inorganic nano-hybrid structures. Remarkably, the injected spin alignment could be controlled by excitation of the nanoparticles. By switching the direction of the magnetic field of the substrate, the PL intensity could be alternated.