Trapping and electrical characterization of single core/shell iron-based nanoparticles in self-aligned nanogaps

Journal article (2019)

Authors

J. Labra Muñoz QN/van der Zant Lab - AS , Kavli institute of nanoscience Delft, Universidad de Chile
Zorica Konstantinović University of Belgrade
Lluis Balcells Universitat Autònoma de Barcelona
Alberto Pomar Universitat Autònoma de Barcelona
H.S.J. van der Zant Kavli institute of nanoscience Delft, QN/van der Zant Lab - AS
Diana Dulic Universidad de Chile
Research Group
QN/van der Zant Lab (AS) (TU Delft)
Copyright: © 2019 J. Labra Muñoz, Zorica Konstantinović, Lluis Balcells, Alberto Pomar, H.S.J. van der Zant, Diana Dulić
DOI
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https://doi.org/10.1063/1.5094352
More Info
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Published Date

2019

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/van der Zant Lab

Abstract

We report on the fabrication and measurements of platinum-self-aligned nanogap devices containing cubed iron (core)/iron oxide (shell) nanoparticles (NPs) with two average different sizes (13 and 17 nm). The nanoparticles are deposited by means of a cluster gun technique. Their trapping across the nanogap is demonstrated by comparing the current vs voltage characteristics (I-Vs) before and after the deposition. At low temperature, the I-Vs can be well fitted to the Korotkov and Nazarov Coulomb blockade model, which captures the coexistence of single-electron tunneling and tunnel barrier suppression upon a bias voltage increase. The measurements thus show that Coulomb-blockaded devices can be made with a nanoparticle cluster source, which extends the existing possibilities to fabricate such devices to those in which it is very challenging to reduce the usual NP agglomeration given by a solution method.