Magnet-in-the-Semiconductor Nanomaterials: High Electron Mobility in All-Inorganic Arrays of FePt/CdSe and FePt/CdS Core-Shell Heterostructures.
We report a colloidal synthesis and electrical and magnetotransport properties of multifunctional "magnet-in-the-semiconductor" nanostructures composed of FePt core and CdSe or CdS shell. Thin films of all-inorganic FePt/CdSe and FePt/CdS core-shell nanostructures capped with In2Se4(2-) molecular chalcogenide (MCC) ligands exhibited n-type charge transport with high field-effect electron mobility of 3.4 and 0.02 cm(2)/V·s, respectively. These nanostructures also showed a negative magnetoresistance characteristic for spin-dependent tunneling. We discuss the mechanism of charge transport and gating in the arrays of metal/semiconductor core-shell nanostructures.
†Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States.
Jae Sung
JS
Son
†Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States.|‡Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 711-873, South Korea.
Jong-Soo
JS
Lee
§Center for Nanoscale Materials, Argonne National Lab, Argonne, Illinois 60439, United States.
Elena V
EV
Shevchenko
†Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States.|§Center for Nanoscale Materials, Argonne National Lab, Argonne, Illinois 60439, United States.
Dmitri V
DV
Talapin
CdSe; FePt; core−shell nanostructures; field-effect transistor; magnetoresistance