Personal Information

BONHOMMEAU Sébastien - Assistant Professor (MDC)

Institut des Sciences Moléculaires - Université Bordeaux 1


Bâtiment A12, 351 cours de la libération

33405 TALENCE cedex

Floor 4 (West) - Door B01 (4S18)

TEL : +33 (0)5 40 00 29 35

FAX : +33 (0)5 40 00 69 94

Mail :

Research Interest

Molecular switching in transition metal complexes (2004-present):
A molecular switching between two distinct spin states can be triggered by means of several external stimuli such as temperature, light, pressure, magnetic and electric fields. In this context, spin crossover complexes in particular, but also Prussian blue analogues are studied with a special emphasis on their photo-induced properties characterized by Raman spectroscopy.

Charge transfer involving transition metal complexes in liquid solution (2007-2013):
Combining different X-ray-based techniques (X-ray absorption spectroscopy in particular) and charge transfer multiplet calculations, metal-to-ligand (or metal-to-solvent) and ligand-to-metal charge transfers are estimated in solvated transition metal ions and metalloporphyrins.

Molecular plasmonics and Nanostructures (2010-present):
Transition metal oxide nanorods, carbon nanotubes, graphene sheets and thin films of technological interest are investigated using confocal Raman microscopy, a coupled AFM/micro-Raman setup as well as Surface or Tip Enhanced Raman Spectroscopies.

More details about education, employments and financial supports are provided on my ORCID public page:

Publications & Contributions

39. PIP2-induced Tau filaments probed by tip-enhanced Raman spectroscopy,
D. Talaga, W. Smeralda, L. Lescos, J. Hunel, N. Lepejova-Caudy, C. Cullin, S. Bonhommeau, S. Lecomte,
Angew. Chem. Int. Ed. 2018, 10.1002/anie.201809636.

38. Spectral dependence of plasmon-enhanced fluorescence in a hollow nanotriangle assembled by DNA origami: towards plasmon assisted energy transfer,
P. Ivaskovic, A. Yamada, J. Elezgaray, D. Talaga, S. Bonhommeau, M. Blanchard-Desce, R.A.L. Vallée, S. Ravaine,
Nanoscale 2018, 10, 16568-16573.

37. Tip-enhanced Raman spectroscopy: a tool for nanoscale chemical and structural characterization of biomolecules,
S. Bonhommeau, S. Lecomte,
ChemPhysChem 2018, 19, 8-18. Cover picture p.2. (Invited review)

36. Structure of toxic oligomers from Aβ1-42 fibrils probed at the nanometer scale by TERS,
S. Bonhommeau, D. Talaga, J. Hunel, S. Henry, C. Cullin, S. Lecomte,
Eur. Biophys. J. 2017, 46 (Suppl.1), S343.

35. Morphological and crystalline characterization of pulsed laser deposited pentacene thin films for organic transistor applications,
A. Pereira, S. Bonhommeau, S. Sirotkin, S. Desplanche, M. Kaba, C. Constantinescu, A.K. Diallo, D. Talaga, J. Penuelas, C. Videlot-Ackermann, A.P. Alloncle, P. Delaporte, V. Rodriguez,
Appl. Surf. Sci. 2017, 418, 446-451.

34. Tip-Enhanced Raman Spectroscopy to distinguish toxic oligomers from Aβ1-42 fibrils at the nanometer scale,
S. Bonhommeau, D. Talaga, J. Hunel, C. Cullin, S. Lecomte,
Angew. Chem. Int. Ed. 2017,56, 1771-1774.
Angew. Chem. 2017, 129, 1797-1800.

33. Electro-mechanical properties of inkjet-printed graphene oxide nanosheets,
I. Nikolaou, H. Hallil, V. Conedera, B. Plano, O. Tamarin, J.-L. Lachaud, D. Talaga, S. Bonhommeau, C. Dejous, D. Rebiere,
Phys. Stat. Sol. (a) 2017, 214, 1600492.

32. One-pot synthesis of gold nanodimers and their use as surface-enhanced raman scattering tags,
N. Vilar-Vidal, S. Bonhommeau, D. Talaga, S. Ravaine,
New J. Chem. 2016, 40, 7299-7302.

31. Colocalized dark-field scattering, atomic force and surface-enhanced Raman scattering microscopic imaging of single gold nanoparticles,
D. Talaga, M. Comesana-Hermo, S. Ravaine, R.A.L. Vallée and S. Bonhommeau,
J. Opt. 2015, 17, 114006.

30. Bare and protected sputtered-noble-metal films for surface-enhanced Raman spectroscopy,
D. Talaga and S. Bonhommeau,
Chem. Phys. Lett. 2014, 615, 89-93.

29. Photoswitching of the spin crossover polymeric material [Fe(Htrz)2(trz)](BF4) under continuous laser irradiation in a Raman scattering experiment,
F. Guillaume, Y.A. Tobon, S. Bonhommeau, J.-F. Létard, L. Moulet and E. Freysz,
Chem. Phys. Lett. 2014, 604, 105-109.

28. Tip-enhanced Raman spectroscopy of combed double-stranded DNA bundles,
S.Najjar, D. Talaga, L. Schué, Y. Coffinier, S. Szunerits, R. Boukherroub, L. Servant, V. Rodriguez and S. Bonhommeau,
J. Phys. Chem. C 2014, 118, 1174-1181.

27. Spin crossover complexes [Fe(NH2trz)3](X)2.nH2O investigated by means of Raman scattering and DFT calculations,
Y.A. Tobon, L. Kabalan, S. Bonhommeau, N. Daro, A. Grosjean, P. Guionneau, S.F. Matar, J.-F. Létard and F. Guillaume,
Phys. Chem. Chem. Phys. 2013, 15, 18128-18137.

26. Raman spectroscopic investigation of individual single-walled carbon nanotubes helically wrapped by ionic, semiconducting polymers,
S. Bonhommeau, P. Deria, M.G. Glesner, D. Talaga, S. Najjar, C. Belin, L. Auneau, S. Trainini, M.J. Therien and V. Rodriguez,
J. Phys. Chem. C 2013, 117, 14840-14849.

25. Ligand discrimination of myoglobin in solution: an iron L-edge X-ray absorption study of the active centre,
K.M. Lange, R. Golnak, S. Bonhommeau and E.F. Aziz,
Chem. Commun. 2013, 49, 4163-4165.

24. Reply to 'Dark channel fluorescence…' and 'Dips and peaks…',
E.F. Aziz, K.M. Lange, S. Bonhommeau, M. Chergui
Nat. Chem.. 2012, 4, 767-768.

23. Magnetism and molecular nonlinear optical second-order response meet in a spin crossover complex,
S. Bonhommeau, P.G. Lacroix, D. Talaga, A. Bousseksou, M. Seredyuk, I.O. Fritsky and V. Rodriguez,
J. Phys. Chem. C 2012, 116, 11251-11255.

22. Origin of dark-channel X-ray fluorescence from transition metal ions in water,
R. Seidel, S. Ghadimi, K.M. Lange, S. Bonhommeau, M.A. Soldatov, R. Golnak, A. Kothe, R. Könnecke, A. Soldatov, S. Thürmer, B. Winter and E.F. Aziz,
J. Am. Chem. Soc. 2012, 134, 1600-1605.

21. Effect of the environment on tris(2-phenylpyridine)iridium molecules embedded in a polyvinyl carbazole matrix,
L. Gonzalez-Urbina, S. Bonhommeau, V. Rodriguez and K. Clays,
Chem. Phys. Lett. 2011, 517, 71-75.

20. Characterization of single transition metal oxide nanorods by combining atomic force microscopy and polarized micro-Raman spectroscopy,
S. Najjar, D. Talaga, Y. Coffinier, S. Szunerits, R. Boukherroub, L. Servant, M. Couzi and S. Bonhommeau,
Chem. Phys. Lett. 2011, 514, 128-133.

19. Synthesis, crystal structures, and solid state quadratic nonlinear optical properties of a series of stilbazolium cations combined with gold cyanide counter-ion,
P.G. Lacroix, M.C. Munoz, A.B. Gaspar, J.A. Real, S. Bonhommeau, V. Rodriguez and K. Nakatani,
J. Mater. Chem. 2011, 21, 15940-15949.

18. Electric-field-induced charge-transfer phase transition: a promising approach toward electrically switchable devices,
T. Mahfoud, G. Molnar, S. Bonhommeau, S. Cobo, L. Salmon, P. Demont, H. Tokoro, S.I. Ohkoshi, K. Boukheddaden and A. Bousseksou,
J. Am. Chem. Soc. 2009, 131, 15049-15054.
Article highlighted in Nature Chem. 2010, 2, 10-11.

17. Probing the electronic structure of hemoglobin active center in physiological solutions,
E.F. Aziz, N. Ottoson, S. bonhommeau, N. Bergmann, W. Eberhardt, M. Chergui,
Phys. Rev. Lett. 2009, 102, 068103; Phys. Rev. Lett. 2017, 119, 069902.

16. One laser shot induced complete phase transition in the spin crossover complex Fe(pyrazine)[Pt(CN)4],
S. Bonhommeau, G. Molnar, S. Cobo, D. Ostrovskii and A. Bousseksou,
Polyhedron 2009, 28, 1610-1613.

15. On the electronic structure of electron doped LaFeAsO{1-x}Fx,
T. Kroll, S. Bonhommeau, T. Kachel, H.A. Dürr, J. Werner, G. Behr, A. Koitzsch, A.K. Ariffin, R. Manzke, F.M.F. de Groot, J. Fink, H. Eschrig, B. Büchner and M. Knupfer,
J. Phys. Soc. Jpn. 2008, 77 Suppl. C, 117-118.

14. Electronic structure of LaOFeAsO{1-x}Fx from X-ray absorption spectroscopy,
T. Kroll, S. Bonhommeau, T. Kachel, H.A. Dürr, J. Werner, G. Behr, A. Koitzsch, R. Hübel, S. Leger, R. Schönfelder, A.K. Ariffin, R. Manzke, F.M.F. de Groot, J. Fink, H. Eschrig, B. Büchner and M. Knupfer,
Phys. Rev. B 2008, 78, 220502(R).
This article was also selected for the issue of December 15 2008 of the Virtual Journal of Applications of Superconductivity.

13. Relaxation process from photo-induced states of double-step spin-crossover systems using a kinetic two-sublattice Ising-like model including intra-site coupling,
S. Mouri, K. Tanaka, S. Bonhommeau, N. Ould Moussa, G. Molnar and A. Bousseksou,
Phys. Rev. B 2008, 78, 174308.

12. Solvent effect of alcohols studied at the L-edge of iron in solution: X-ray absorption and multiplet calculations,
S. Bonhommeau, N. Ottosson, W. Pokapanich, S. Svensson, W. Eberhardt, O. Björneholm and E.F. Aziz,
J. Phys. Chem. B 2008, 112, 12571-12574.

11. Metal-to-ligand and ligand-to-metal charge transfer in thin films of Prussian blue analogues investigated by X-ray absorption spectroscopy,
S. Bonhommeau, N. Pontius, S. Cobo, L. Salmon, F.M.F. de Groot, G. Molnar, A. Bousseksou, H.A. Dürr and W. Eberhardt,
Phys. Chem. Chem. Phys. 2008, 10, 5882-5889.

10. Single-laser-shot-induced complete bidirectional spin transition at room temperature in single crystals of (FeII(pyrazine)(Pt(CN)4)),
S. Cobo, D. Ostrovskii, S. Bonhommeau, L. Vendier, G. Molnar, L. Salmon, K. Tanaka and A. Bousseksou,
J. Am. Chem. Soc. 2008, 130, 9019-9024.

9. Structural-electronic correlation in the first-order phase transition of [FeH2L2-Me](ClO4) (H2L2-Me = bis[(((2-methylimidazol-4-yl)methylidene)-3-aminopropyl)ethylene-diamine]),
N. Bréfuel, S. Imatomi, H. Torigoe, H. Hagiwara, S. Shova, J.F. Meunier, S. Bonhommeau, J.P. Tuchagues and N. Matsumoto,
Inorg. Chem. 2006, 45, 8126-8135.

8. Unified dynamical description of pulsed magnetic field and pressure effects on the spin crossover phenomenon,
S. Bonhommeau, G. Molnar, M. Goiran, K. Boukheddaden and A. Bousseksou,
Phys. Rev. B 2006, 74, 064424.

7. On the dielectric properties of the spin crossover complex [Fe(bpp)2](BF4)2,
T. Guillon, S. Bonhommeau, J. Sanchez Costa, A. Zwick, J.F. Létard, P. Demont, G. Molnar and A. Bousseksou,
Phys. Stat. Sol. (a) 2006, 203, 2974-2980.

6. Photoswitching of the dielectric constant of the spin crossover complex [FeL(CN)2].H2O,
S. Bonhommeau, T. Guillon, L.M. Lawson Daku, P. Demont, J. Sanchez Costa, J.F. Létard, G. Molnar and A. Bousseksou,
Angew. Chem. Int. Ed. 2006, 45, 1625-1629;
Angew. Chem. 2006, 118, 1655-1659.

5. High-spin to low-spin relaxation kinetics in the [Fe(TRIM)2]Cl2 complex,
S. Bonhommeau, N. Bréfuel, V.K. Palfi, G. Molnar, A. Zwick, L. Salmon, J.P. Tuchagues, J. Sanchez Costa, J.F. Létard, H. Paulsen and A. Bousseksou,
Phys. Chem. Chem. Phys. 2005, 7, 2909-2914.

4. One shot laser pulse induced reversible spin transition in the spin crossover complex Fe(C4H4N2)[Pt(CN)4] at room temperature,
S. Bonhommeau, G. Molnar, A. Galet, A. Zwick, J.A. Real, J.J. McGarvey and A. Bousseksou,
Angew. Chem. Int. Ed. 2005, 44, 4069-4073 - cover picture p. 3943;
Angew. Chem. 2005, 117, 4137-4141 - cover picture p. 4011.

3. Selective photoswitching of the binuclear spin crossover compound [Fe(bt)(NCS)2]2(bpym) into two distinct macroscopic phases,
N. Ould Moussa, G. Molnar, S. Bonhommeau, A. Zwick, S. Mouri, K. Tanaka, J.A. Real and A. Bousseksou,
Phys. Rev. Lett. 2005, 94, 107205.

2. Propagation of ultrashort pulses in resonant atomic systems: Observation and control,
M.A. Bouchene, J.C. Delagnes, M. Jacquey, S. Bonhommeau, P. Zahariev, A. Monmayrant, B. Chatel and B. Girard,
J. Phys. IV 2004, 119, 13-18.

1. Experimental demonstration of phase control of dispersion effects for an ultrashort pulse train propagating in a resonant medium,
M. Jacquey, S. Bonhommeau and M.A. Bouchene,
Opt. Lett. 2003, 28, 1272-1274.