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RESEARCH PRODUCT
Effect of Charge Transfer in Magnetic-Plasmonic Au@MOx (M = Mn, Fe) Heterodimers on the Kinetics of Nanocrystal Formation
Wolfgang TremelFrédéric LaquaiBenjamin BalkeAndreas HenkelMirko MontignyIsabel SchickDominik GehrigMartin Panthöfersubject
Materials sciencebusiness.industryBand gapGeneral Chemical EngineeringNanoparticleNanotechnologyGeneral ChemistryElectronic structureSemimetalNanomaterialsMetalSemiconductorNanocrystalChemical physicsvisual_artMaterials Chemistryvisual_art.visual_art_mediumbusinessdescription
Heteronanoparticles represent a new class of nanomaterials exhibiting multifunctional and collective properties, which could find applications in medical imaging and therapy, catalysis, photovoltaics, and electronics. This present work demonstrates the intrinsic heteroepitaxial linkage in heterodimer nanoparticles to enable interaction of the individual components across their interface. It revealed distinct differences between Au@MnO and Au@Fe3O4 regarding the synthetic procedure and growth kinetics, as well as the properties to be altered by the variation of the electronic structure of the metal oxides. The chemically related metal oxides differ concerning their band gap; while MnO is a Mott-Hubbard insulator with a large band gap, Fe3O4 is a semimetal with thermally activated conductivity. The fluorescence dynamics indicate a prolonged relaxation time (>2 ns) for electrons of the conduction band of the Au nanoparticles after interfacing to Fe3O4. Here, the semiconductor is not depleted and forms an ohm...
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-06-24 | Chemistry of Materials |