Molecular nanostructures

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I am mainly interested in the study of various molecular nanostructures and devices made of  functional molecules (photoswitch, redox, magnetic,…) and 2D materials. I focus on their electronic properties at the nanoscale with the aim to contribute to the fundamental understandings of these systems. Characterization tools to study electron, spin and heat transport properties include various scanning probe microscopes  (C-AFM, EFM, STM, SThM, SMM,…) as well as macroscopic soft electrical contact techniques on self-assembled monolayers (Hg, eGaIn contacts). Recent main results include:
– first demonstration of a molecular diode operating at 17 GHz (using interferometric scanning microwave microscope)
– role and determination of the π-π intermolecular interaction energies in molecular junctions
– electron transport in molecular devices based on polyoxometalates, peptides, molecular switches (optical, ion,…), Prussian blue analog, and on various electrode materials (Si, metal, ferromagnet).
– thermal transport at the nanoscale (SThM : scanning thermal microscope) of molecular nanostructures made of BTBT derivatives and other molecules.

Some relevant publications (see more in the publication section):

Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale.
M. N. Gueye, A. Vercouter, R. Jouclas, D. Guérin, V. Lemaur, G. Schweicherc, S. Lenfant, 
A. Antidormi, Y. Geerts, C. Melis, 
J. Cornil & D. Vuillaume. Submitted

Long-Range Electron Transport in Prussian Blue Analog Nanocrystals.
R. Bonnet, S. Lenfant, S. Mazérat, T. Mallah & D. Vuillaume. Nanoscale 12, 20374–20385 (2020). link

Conductance switching at the nanoscale of diarylethene derivatives self-assembled monolayers on La0.7Sr0.3MnO3.
L. Thomas, D. Guérin, B. Quinard, E. Jacquet, R. Mattana, P. Seneor, 
D. Vuillaume, T. Mélin & S. Lenfant. Nanoscale 12, 8268-8276 (2020). link

Electrical molecular switch addressed by chemical stimuli.
H. Audi,  Y. Viero, N. Alwhaibi, Z. Chen, M. Iazykov, A. Heynderickx, F. Xiao, D. Guérin, C Krzeminski, I.M. Grace, C.J. Lambert, O. Siri, D. Vuillaume, S. Lenfant & H. Klein. Nanoscale 12, 10127-10139, (2020). link

Molecular electronics: from single-molecule to large-area devices.
D. Vuillaume. ChemPlusChem 84, 1215-1221 (2019). link

Electron transport through self-assembled monolayers of tripeptides.
E. Mervinetsky, I. Alshanski, S. Lenfant, D. Guerin, L. Medrano Sandonas, A. Dianat, R. Gutierrez, G. Cuniberti, M. Hurevich, S. Yitzchaik & D. Vuillaume. J. Phys. Chem. C .123 (14), 9600–9608 (2019). link

Molecular Signature of Polyoxometalates in Electron Transport of Silicon-based Molecular Junctions.
M. Laurans, K. Dalla Francesca, F. Volatron, G. Izzet, D. Guerin, D. Vuillaume, S. Lenfant & A. Proust. Nanoscale 10, 17156-17165 (2018). link

Probing the frontier orbital energies of Co9(P2W15)3 polyoxometalate clusters at molecule-metal and molecule-water interfaces.
X. Yi, N. V. Izarova, M. Stuckart, D. Guérin, L. Thomas, S. Lenfant, D. Vuillaume, J. van Leusen, T. Duchoň, S. Nemšák, S. D. M. Bourone, S. Schmitz & P. Kögerler. J. Am. Chem. Soc., 139, 14501-14510 (2017). link

Estimation of 𝜋-𝜋 electronic couplings from current histograms.
J. Trasobares, J. Rech, C. Walh, T. Jonckeere, T. Martin, O. Aleveque, E. Levillain, V. Diez-Cabanes, Y. Olivier, J. Cornil, J.P NYS, R. Sivakumarasamy, K. Smaali, P. Leclere, A. Fujiware, D. Theron, D. Vuillaume & N. Clément. Nano Letters, 17, 3215-3224 (2017). link

A 17GHz molecular rectifier.
J. Trasobares, D. Vuillaume, D. Theron & N. Clement. Nature Comm. 7, 12850 (2016). link