Trapping and electrical characterization of single core/shell iron-based nanoparticles in self-aligned nanogaps
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.
Keywords
Cite
@article{arxiv.1910.08326,
title = {Trapping and electrical characterization of single core/shell iron-based nanoparticles in self-aligned nanogaps},
author = {Jacqueline Labra-Muñoz and Zorica Konstantinovic and Lluis Balcells and Alberto Pomar and Herre S. J. Van der Zant and Diana Dulić},
journal= {arXiv preprint arXiv:1910.08326},
year = {2019}
}
Comments
(Figure 3d was updated) This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 115, 063104 (2019) and may be found at https://doi.org/10.1063/1.5094352