title: Photospintronics: Magnetic Field-Controlled Photoemission and Light-Controlled Spin Transport in Hybrid Chiral Oligopeptide-Nanoparticle Structures.
abstract: The combination of photonics and spintronics opens new ways to transfer and process information. It is shown here that in systems in which organic molecules and semiconductor nanoparticles are combined, matching these technologies results in interesting new phenomena. We report on light induced and spin-dependent charge transfer process through helical oligopeptide-CdSe nanoparticles' (NPs) architectures deposited on ferromagnetic substrates with small coercive force (∼100-200 Oe). The spin control is achieved by the application of the chirality-induced spin-dependent electron transfer effect and is probed by two different methods: spin-controlled electrochemichemistry and photoluminescence (PL) at room temperature. The injected spin 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.
authors.affiliation: Department of Chemical Physics, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Prakash Chandra
authors.initials: PC
authors.lastname: Mondal
authors.affiliation: Department of Chemical Physics, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Partha
authors.initials: P
authors.lastname: Roy
authors.affiliation: Center for Memory and Recording Research, University of California , San Diego, California 92093, United States.
authors.forename: Dokyun
authors.initials: D
authors.lastname: Kim
authors.affiliation: Center for Memory and Recording Research, University of California , San Diego, California 92093, United States.
authors.forename: Eric E
authors.initials: EE
authors.lastname: Fullerton
authors.affiliation: Chemical Research Support, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Hagai
authors.initials: H
authors.lastname: Cohen
authors.affiliation: Department of Chemical Physics, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Ron
authors.initials: R
authors.lastname: Naaman
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D049449:Luminescence; D060526:Magnetic Fields; D053758:Nanoparticles / Q000737:chemistry*; D009842:Oligopeptides / Q000737:chemistry*; D017433:Protein Structure, Secondary; D018036:Selenium Compounds / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D019187:Cadmium Compounds; D009842:Oligopeptides; D018036:Selenium Compounds; C058667:cadmium selenide
keywords: Charge transfer; chirality; ferromagnet; oligopeptide; spin selectivity; spin transport