In-Vacuum Projection of Nanoparticles for On-Chip Tunneling Spectroscopy
authors Yu, Q; Cui, LM; Lequeux, N; Zimmers, A; Ulysse, C; Rebuttini, V; Pinna, N; Aubin, H
nationality International
journal ACS NANO
author keywords nanoparticle; nanogap; Coulomb blockade; tunneling spectroscopy; quantum confinement
keywords NANOCRYSTAL SUPERLATTICES; COLLOIDAL NANOCRYSTALS; GOLD NANOPARTICLES; SURFACE LIGANDS; ELECTROMIGRATION; FABRICATION; ELECTRODES
abstract Starting with a discussion of the percolation problem applied to the trapping of conducting nanoparticles between nanometer-spaced electrodes, we show that a good strategy to trap a single nanoparticle between the electrodes is to prepare chips with low coverage of nanoparticles to avoid percolating current paths. To increase the probability of trapping a single nanoparticle, we developed a new method where nanoparticles are projected in-vacuum on the chip, followed by a measure of the tunnel current, in a cycle that is repeated up to a few thousand times until a preset threshold value is reached. A plot of the tunneling current as a function of time allows discriminating between the two possible current paths, i.e., a single nanoparticle trapped between the electrodes or a percolating path across many nanoparticles. We applied the method to prepare chip circuits with single gold nanoparticles, as demonstrated by the observation of Coulomb blockade. Furthermore, we applied the method to trap single magnetite nanoparticles for the study of electric-field-induced switching from insulator to metal In single nanoparticles.
publisher AMER CHEMICAL SOC
issn 1936-0851
year published 2013
volume 7
issue 2
beginning page 1487
ending page 1494
digital object identifier (doi) 10.1021/nn305264g
web of science category Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000315618700069
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journal analysis (jcr 2017):
journal impact factor 13.709
5 year journal impact factor 14.820
category normalized journal impact factor percentile 95.274
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