Magnet-in-the-semiconductor nanomaterials: High electron mobility in all-inorganic arrays of FePt/CdSe and FePt/CdS core-shell heterostructures

Jae Sung Son; Jong Soo Lee; Elena V. Shevchenko; Dmitri V. Talapin

doi:10.1021/jz400612d

Magnet-in-the-semiconductor nanomaterials: High electron mobility in all-inorganic arrays of FePt/CdSe and FePt/CdS core-shell heterostructures

Jae Sung Son, Jong Soo Lee, Elena V. Shevchenko, Dmitri V. Talapin

Department of Energy and Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

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 cm²/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.

Original language	English
Pages (from-to)	1918-1923
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	4
Issue number	11
DOIs	https://doi.org/10.1021/jz400612d
State	Published - 6 Jun 2013

Keywords

CdSe
FePt
core-shell nanostructures
field-effect transistor
magnetoresistance

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10.1021/jz400612d

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T2 - High electron mobility in all-inorganic arrays of FePt/CdSe and FePt/CdS core-shell heterostructures

AU - Son, Jae Sung

AU - Lee, Jong Soo

AU - Shevchenko, Elena V.

AU - Talapin, Dmitri V.

PY - 2013/6/6

Y1 - 2013/6/6

N2 - 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 In2Se42- molecular chalcogenide (MCC) ligands exhibited n-type charge transport with high field-effect electron mobility of 3.4 and 0.02 cm2/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.

AB - 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 In2Se42- molecular chalcogenide (MCC) ligands exhibited n-type charge transport with high field-effect electron mobility of 3.4 and 0.02 cm2/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.

KW - CdSe

KW - FePt

KW - core-shell nanostructures

KW - field-effect transistor

KW - magnetoresistance

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Magnet-in-the-semiconductor nanomaterials: High electron mobility in all-inorganic arrays of FePt/CdSe and FePt/CdS core-shell heterostructures

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