Title :

Long-range electron transport in Prussian blue analog nanocrystals

Author(s) :

Bonnet, Roméo [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Lenfant, Stephane [Auteur]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]
Mazérat, Sandra [Auteur]
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
Mallah, Talal [Auteur]
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
Vuillaume, Dominique [Auteur]
Nanostructures, nanoComponents & Molecules - IEMN [NCM - IEMN]

Journal title :

Nanoscale

Pages :

20374-20385

Publisher :

Royal Society of Chemistry

Publication date :

2020

ISSN :

2040-3364

English keyword(s) :

Nanoscale electron transport
cyanide bridged nanocrystal
Prussian blue
conducting-AFM
nanoscale device

HAL domain(s) :

Physique [physics]/Matière Condensée [cond-mat]/Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]
Sciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique

English abstract : [en]

We report electron transport measurements through nano-scale devices consisting of 1 to 3 Prussian blue analog (PBA) nanoparticles connected between two electrodes. We compare two types of cubic nanoparticles, CsCo<sup>I ...
Show more >We report electron transport measurements through nano-scale devices consisting of 1 to 3 Prussian blue analog (PBA) nanoparticles connected between two electrodes. We compare two types of cubic nanoparticles, CsCo^IIIFe^II (15 nm) and CsNi^IICr^III (6 nm), deposited on highly oriented pyrolytic graphite and contacted by conducting-AFM. The measured currents show an exponential dependence with the length of the PBA nano-device (up to 45 nm), with low decay factors β, in the range 0.05 - 0.1 nm^-1 and 0.15 - 0.18 nm^-1 for the CsCoFe and the CsNiCr nanoparticles, respectively. From the theoretical analysis of the current-voltage curve for the nano-scale device made of a single nanoparticle, we deduce that the electron transport is mediated by the localized d bands at around 0.5 eV from the electrode Fermi energy in the two cases. By comparison with ab-initio calculations, we tentatively identify the involved orbitals as the filled Fe(II)-t₂g d band (HOMO) for CsCoFe and the half-filled Ni(II)-eg d band (SOMO) for CsNiCr. Conductance values measured for multi-nanoparticle nano-scale devices (2 and 3 nanoparticles between the electrodes) are consistent with a multi-step coherent tunneling in the off-resonance regime between adjacent PBAs, a simple model gives a strong coupling (around 0.3 eV) between the adjacent PBA nanoparticles, mediated by electrostatic interactions.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Spintronique à base de molécule fonctionnelles

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL