• Nanofabrication in StNano clean room.
• Optical lithography.
• Electronic lithography.
• Low temperature magneto-transport measurements (AC/DC, 1.5K to 330K, 8 Tesla).
• van der Waals stacking.
• Electrochemistry, Template synthesis, drop casting, optically triggered self assembly process.
• Focus Ion Beam.

• Enseignant-chercheur at Université de Strasbourg (UNISTRA, HDR, with tenure).
• Junior Member at Institut Universitaire de France (IUF).

I explore new strategies to build functional devices based on nanostructures and new materials – and in the meanwhile to contribute to a better understanding of the physical properties of these new systems.

The research is mostly conducted within the Nano-Devices Team.

Research interests (check my Google Scholar page for detailed publication list):

1. Reconfigurable 2D/0D p-n Graphene/HgTe Nanocrystal Heterostructure for Infrared Detection
   U.N. Noumbe, C. Greboval, C. Livache, A. Chu, H. Majjad, L.E. Parra López, L.D.N. Mouafo, B. Doudin, S. Berciaud, J. Chaste, A. Ouerghi, E. Lhuillier*, J.-F. Dayen*.
   ACS Nano, 14, 4567 (2020)
2. Pushing Absorption of Perovskite Nanocrystals into the Infrared
   P. Rastogi, A. Chu, C. Gréboval, J. Qu, U.N. Noumbé, S.-S. Chee, M. Goyal, A. Khalili, X. Zhen Xu, H. Cruguel, S. Ithurria, B. Gallas, J.-F. Dayen, L. Dudy, M.G. Silly, G. Patriarche, A. Degiron, G. Vincent, E. Lhuillier
   Nano Letters, 20, 3999 (2020)
3. Two-dimensional van der Waals spinterfaces and magnetic-interfaces
   J.F. Dayen*, S. J. Ray, O. Karis, I.J. Vera-Marun* and M. Venkata Kamalakar*
   Applied Physics Review, 7, 011303 (2020)
4. Magnetic phase and magneto-resistive effects in vanadium oxide epitaxial nanoclusters
   B..K. Zanguim, L. Joly, F. Scheurer, P. Ohresser, J.F. Dayen, C. Ulhaq-Bouillet, J. Uzan, B. Kundys, H. Majjad and David Halley.
   Applied Physics Letters, accepted, in press (2020).
5. Tuning graphene transistors through ad hoc electrostatics induced by a nanometer-thick molecular underlayer
   A. Mahmood, C.S. Yang, S. Jang, L. Routaboul, H. Chang, A. Ghisolfi, P. Braunstein, L. Bernard, T. Verduci, J.-F. Dayen, P. Samorì, J.-O Lee, B. Doudin.
   Nanoscale, 11, 19705 (2019).
6. Ionic Glass–Gated 2D Material–Based Phototransistor: MoSe2 over LaF3 as Case Study
   U. Noumbe, C. Gréboval , C. Livache, T. Brule, B. Doudin, A. Ouerghi , E. Lhuillier*, J.-F. Dayen*
   Advanced Functional Materials, 29, 1902723 (2019)
7. Field-Effect Transistor and Photo-Transistor of Narrow-Band-Gap Nanocrystal Arrays Using Ionic Glasses
   C. Gréboval, U. Noumbe, N. Goubet, C. Livache, J. Ramade, J. Qu, A. Chu, B. Martinez, Y. Prado, S. Ithurria, A. Ouerghi, H. Aubin, J.F. Dayen*, E. Lhuillier*.
   Nano Letters, 19, 3981 (2019).
8. Anisotropic Magneto‐Coulomb Properties of 2D–0D Heterostructure Single Electron Device
   L.D.N. Mouafo, F. Godel, G. Melinte, S. Hajjar‐ Garreau, H. Majjad, B. Dlubak, O. Ersen, B. Doudin, L. Simon, P. Seneor* and J.‐F. Dayen*.
   Advanced Materials, 30, 1802478 (2018)
9. Current crowding issues on nanoscale planar organic transistors for spintronics applications
   T. Verduci, G. Chaumy, J.F. Dayen, N. Leclerc, E. Devaux, M.A. Stoeckel, E. Orgiu, P. Samorì, B. Doudin
   Nanotechnology, 29, 365201 (2018)
10. HgSe self-doped nanocrystals as a platform to investigate the effects of vanishing confinement
    B Martinez, C Livache, LD Notemgnou Mouafo, N. Goubet, S. Keuleyan, H. Cruguel, S. Ithurria, H. Aubin, A. Ouerghi, B. Doudin, E. Lacaze, B. Dubertret, M.G. Silly, R.P. S. M. Lobo, J.-F. Dayen and E. Lhuillier*
    ACS Applied Materials & Interfaces 9 , 36173 (2017)
11. Tuning a sign of magnetoelectric coupling in paramagnetic NH 2 (CH 3) 2 Al 1− x Cr x (SO 4) 2× 6H 2 O crystals by metal ion substitution
    V Kapustianyk, Y Eliyashevskyy, Z Czapla, (…), B Kundys
    Scientific reports 7 , 14109 (2017)
12. Tuning contact transport mechanisms in bilayer MoSe2 transistors up to the Fowler-Nordheim regime
    L.D.N Mouafo, F. Godel, G. Froehlicher, S. Berciaud, B. Doudin, M. Venkata Kamalakar* and  J.F. Dayen*
    2D Materials, 4 (1), 015037 (2017).
13. Conductance Oscillations in a Graphene/Nanocluster Hybrid Material: Toward Large-Area Single-Electron Devices
    F. Godel, L.D.N. Mouafo, G. Froehlicher, B. Doudin, S. Berciaud, Y. Henry, J.F. Dayen* and D. Halley*
    Advanced Materials, Volume 29, Issue 3, 1604837 (2017)
14. Surface-driven magnetotransport in perovskite nanocrystals
    Ha Le Thi N’Goc, L.D.N. Mouafo, C. Etrillard, A. Torres‐Pardo, J.F. Dayen, S. Rano, G. Rousse, C. Laberty‐Robert, J. Gonzales Calbet, M. Drillon, C. Sanchez, B. Doudin and D. Portehault.
    Advanced Materials, 29, 1604745 (2017)
15. Spintronique à base de Graphène
    J.C. le Breton & J.F. Dayen
    Micro et Nanotechnologies : Avancées, tendances et perspectives
    février 2016, p 91-92.
16. Phototransport in colloidal nanoplatelets array
    E Lhuillier, JF Dayen, DO Thomas, A Robin, S Ithurria, H Aubin, B. Dubertret
    Physica status solidi (c), 13 , 526 (2016).
17. High conductivity organic thin films for spintronics: the interface resistance bottleneck,
    S. Zanettini, G. Chaumy, P. Chávez, N. Leclerc, C. Etrillard, B. Leconte, F. Chevrier, J-F Dayen and B Doudin
    Journal of Physics: Condensed Matter, 27, 462001 (2015).
18. Conductivity in organic semiconductors hybridized with the vacuum field,
    E. Orgiu, J. George, J. A. Hutchison, E. Devaux, J. F. Dayen, B. Doudin, F. Stellacci, C. Genet, J. Schachen-mayer, C. Genes, G. Pupillo, P. Samorì & T. W. Ebbesen
    Nature Materials, 14, 1123 (2015)
19. Selective Nanotrench Filling by One-Pot Electroclick Self-Constructed Nanoparticle Films
    G. Rydzek, D. Toulemon, A. Garofalo, C. Leuvrey, J.F. Dayen, D. Felder‐Flesch, P. Schaaf, L. Jierry, S. Begin‐Colin, B.P. Pichon, F. Boulmedais
    Small., 11, 4638 (2015)
20. Spin Transition in Arrays of Gold Nanoparticles and Spin Crossover Molecules
    E.J Devid, P.N. Martinho, M. Venkata Kamalakar, Ú. Prendergast, C. Kübel, T. Lemma, J.F. Dayen, T.E. Keyes, B. Doudin, M. Ruben, S.J. van der Molen
    ACS Nano, 2015, 9, 4496 (2015).
21. Magnetoconductance anisotropy of a polymer thin film at the onset of metallicity
    S. Zanettini, J. F. Dayen, C. Etrillard, N. Leclerc, M. Venkata Kamalakar and B. Doudin
    Appl. Phys. Lett. 106 , 063303 (2015).
22. Nanoplatelets bridging a Nanotrench: a new architecture for photodetectors with increased sensitivity.
    E. Lhuillier*, J.F. Dayen*, D. Thomas, A. Robin, B. Doudin, B. Dubertret*.
    Nano Letters, 15, 1736 (2015). DOI: 10.1021/nl504414g (February 4, 2015)
23.   Room temperature dry processing of patterned CVD graphene devices
    A. Mahmood, C.-S. Yang, J.-F. Dayen, S. Park, M. Venkata Kamalakar, D. Metten, S. Berciaud, J.O. Lee and B. Doudin.
    Carbon, 86, 256-263 (2015)
24. Voltage-controlled inversion of tunnel magnetoresistance in epitaxial Nickel/Graphene/MgO/Cobalt junctions
    F. Godel, M. Venkata Kamalakar, B. Doudin, Y. Henry, D. Halley* and J.F. Dayen*,
    Appl. Phys. Lett. 105, 152407 (2014)
25. The influence of molecular mobility on the properties of networks of gold nanoparticles and organic ligands
    E. Devid, P.N. Martinho, M. Venkata Kamalakar U. Prendergast, C. Kübel, T. Lemma, J.F. Dayen, T.E. Keyes, B. Doudin, M. Ruben, S.J. van der Molen.
    Beilstein J. Nanotechnol., 5, 1664–1674 (2014)
26. Epitaxy of MgO magnetic tunnel barriers on epitaxial graphene
    F. Godel, E. Pichonat, D.Vignaud, H. Majjad, D.Metten, Y. Henry, S.Berciaud, J.F.Dayen and D. Halley.
    Nanotechnology, 24, 475708 (2013)
27. Enhancing the Molecular Signature in Molecule-Nanoparticle Networks Via Inelastic Cotunneling.
    J.-F. Dayen, E. Devid, M.V. Kamalakar, D. Golubev, C. Guédon, V. Faramarzi, B. Doudin, S.J. van der Molen
    Advanced Materials, 25: 400–404. (2013)
28.   Light triggered self-fabrication of supramolecular organic nanowires as metallic interconnects.
    V.Faramarzi, F.Niess, E.Moulin, M.Maaloum, J.-F.Dayen, J.B. Beaufrand, S.Zanettini, B.Doudin, N.Giuseppone.
    Nature Chemistry, 4,485–490 (2012)
29. CP to Co-tunneling Enhancement of the Electrical Response of Nanoparticle Networks
    M. Pauly, J.-F. Dayen*, D. Golubev, J.-B. Beaufrand, B. P. Pichon, B. Doudin*, S. Bégin-Colin.
    Small, 8, CP24-CP24 (2012).
30. Co-tunneling Enhancement of the Electrical Response of Nanoparticle Networks.
    M. Pauly, J.-F. Dayen*, D. Golubev, J.-B. Beaufrand, B. P. Pichon, B. Doudin*, S. Bégin-Colin.
    Small, 8, 108–115 (2012).
31. 12.Resonance Raman Study of Spin-Crossover [Fe(Htrz)2(trz)](BF4)·H2O particles coated with gold.      
    Y. A. Tobon, C. Etrillard, O. Nguyen, J.-F. Létard, V. Faramarzi, J.-F. Dayen, B. Doudin, D.M. Bassani and F. Guillaume
    Eur. J. Inorg. Chem., 35, 5837–5842 (2012).
32. Magnetoresistance signature of resonant states in electromigrated Ni nanocontacts.       
    J.-B. Beaufrand, J.-F. Dayen, N. T. Kemp, A. Sokolov, and B. Doudin.
    Appl. Phys. Lett. ,98, 142504 (2011).
33.   Heteronanojunctions with atomic size control using a lab-on-chip electrochemical approach with integrated microfluidics.     
    P. Lunca Popa, G. Dalmas, V. Faramarzi, J.F. Dayen, H. Majjad, N.T. Kemp, B. Doudin.
    Nanotechnology, 22, 215302 (2011).
34. Photoconduction in [Fe(Htrz)(2)(trz)](BF(4))center dot H(2)O nanocrystals.
    C. Etrillard, V. Faramarzi, J.-F. Dayen, J.-F. Letard and B. Doudin
    Chem. Commun., 47, 9663-9665 (2011).
35.   Nanotrench for nano and microparticle electrical interconnects.
    J-F Dayen*, V Faramarzi, M Pauly, N T Kemp, M Barbero, B P Pichon, H Majjad, S Begin-Colin and B Doudin.
    Nanotechnology, 21, 335303 (2010).
36. Conductance of disordered semiconducting nanowires and carbon nanotubes:a chain of quantum dots.
    J.-F. Dayen, T. Wade, G. Rizza, D. Golubev, C.S. Cojocaru, D. Pribat, X. Jehl, M. Sanquer, J.-E. Wegrowe.
    The European Physical Journal Applied Physic, 48, 10604 (2009).
37. 6. Side-gated transport in focused-ion-beam-fabricated multilayered graphene nanoribbons.        
    -F. Dayen, A. Mahmood, Dmitry S. Golubev, I. Roch-Jeune, P. Salles, E. Dujardin.
    Small, 4, 716-720 (2008).
38.   Nanoporous alumina wire templates for surrounding-gate nanowire transistors.
    T.-L. Wade, X. Hoffer, A.D. Mohammed, J.-F. Dayen, J.E. Wegrowe, D. Pribat.
    Nanotechnology, 18, 125201 (2007).     
39.   Electronic transport of silicon nanowires grown in porous Al2O3 membrane.      
    J.-F. Dayen*, A. Rumyantseva, C. Ciornei, T.L Wade, C.-S. Cojocaru, D. Pribat, et J.-E. Wegrowe.
    Applied Physics Letter, 90, 173110 (2007).
40.   Transition from Coulomb blockade to insulator regime in multiwall carbon nanotubes.  
    J.-F. Dayen, X. Jehl, T.L. Wade, M. Sanquer, J.E. Wegrowe.
    Phys. Stat. Sol.B., 243, 3413 (2006).
41. Anisotropic magnetothermopower : Contribution of interband relaxation.     
    J.-E. Wegrowe, Q.A. Nguyen, M.Al-Barki, J.-F. Dayen, T.L. Wade, et H.J.Drouhin
    Physical Review B., 73, 134422 (2006).
42. Conductance in multiwall carbon nanotubes and semiconductor nanowires.       
    J.-F. Dayen, T. L. Wade, M. Konczykowski, X. Hoffer and J.-E. Wegrowe
    Physical Review B, 72, 073402 (2005).