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Contact data:

Extension: 436103
Direct phone: 932557463
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Department: NMOEH


Sebastian is CSIC-ICMAB tenured track researcher with a strong background in nanoscale thermal transport and optical spectroscopy. His research focuses on studying the thermal properties of inorganic/organic nanostructures through advanced characterization techniques. In recent years he focused in developing novel thermal experimental methodologies based on contactless optical techniques.

University Degrees:

2004 –2008     PhD in Physics. Autonomous University of Barcelona. Spain."Optical properties of low dimensional semiconductor nanostructures under high pressures”. Supervisors: Prof. A. R. Goñi and Dr. M. I. Alonso. Fellowship granted from the EU commission. Alban Program (3 years)

2002 –2003     Master in Physics. Instituto Balseiro - Universidad de Cuyo, S.C. de Bariloche. Argentina."Transport properties of dynamical phases in josephson junctions arrays" Fellowship granted from the CNEA, Argentina (1 year)

2000 –2002     Degree in Physics. Instituto Balseiro - Universidad de Cuyo, S.C. de Bariloche. Argentina. Fellowship granted from the CNEA, Argentina (2 years)

1998 –2000     Mechanical Engineering. Instituto Tecnológico de Buenos Aires (ITBA),Argentina.Up to 3rd year approved.


2012–2015     Post-doctoral Fellowship. Juan de la Cierva. 2004–2007     PhDfellowship. EU Commission. Alban Program (3 years) 2002–2003     Master Fellowship.National Atomic Energy Commission, Argentina (1year) 2000 –2002     Bachelor Fellowship.NationalAtomic EnergyCommission, Argentina (2years)

Scientific Highlights:


“Polarity in GaN and ZnO: Theory, measurement, growth, and devices”, Jesús Zúñiga-Pérez, Vincent Consonni, Liverios Lymperakis, Xiang Kong, Achim Trampert, Sergio Fernández-Garrido, Oliver Brandt, Hubert Renevier, Stacia Keller, Karine Hestroffer, Markus R Wagner, Juan Sebastián Reparaz, Fatih Akyol, Siddharth Rajan, Stéphanie Rennesson, Tomás Palacios, Guy Feuillet, Applied Physics Reviews 3, 041303 (2016)

"Nanophononics: State of the art and perspectives"Sebastian Volz, Jose Ordonez-Miranda, Andrey Shchepetov, Mika Prunnila, Jouni Ahopelto, Thomas Pezeril, Gwenaelle Vaudel, Vitaly Gusev, Pascal Ruello, Eva M Weig, Martin Schubert, Mike Hettich, Martin Grossman, Thomas Dekorsy, Francesc Alzina, Bartlomiej Graczykowski, Emigdio Chavez-Angel, J Sebastian Reparaz, Markus R Wagner, Clivia M Sotomayor-Torres, Shiyun Xiong, Sanghamitra Neogi, Davide Donadio


Most Relevant Publications

“Bound excitons in ZnO: Structural defect complexes versus shallow impurity centers”, M. R. Wagner, G. Callsen, J. S. Reparaz, J.-H. Schulze, I. Ostapenko, C. Nenstiel, M. Kaiser, R. Kirste,M. Cobet, A. Hoffmann, A. V. Rodina, S. Lautenschläger, S. Eisermann, B. K. Meyer., Phys. Rev. B 84, 035313 (2011)

“Nanoscale Imaging of InN Segregation and Polymorphism in Single Vertically Aligned InGaN/GaNMulti Quantum Well Nanorods by Tip-Enhanced Raman Scattering”, E. Poliani, M. R. Wagner, J. S. Reparaz, M. Mandl, M. Strassburg, X. Kong, A. Trampert, C. M.Sotomayor Torres, A. Hoffmann, and J. Maultzsch, Nano Letters 13, 3205 (2013)

“Reduction of the thermal conductivity in free-standing silicon nano-membranes investigated by non-invasive Raman thermometry”, E.Chávez-Ángel, J. S.Reparaz, J.Gomis-Bresco, M. R.Wagner, J.Cuffe, B.Graczykowski, A.Shchepetov, H.Jiang, M. Prunnila, J. Ahopelto, F. Alzina, C. M. Sotomayor Torres, APL Materials 2, 012113 (2014)

“A novel contactless technique for thermal field mapping and thermal conductivity determination: Two Laser Raman Thermometry”, J. S. Reparaz, E. Chavez-Angel, M. R. Wagner, B. Graczykowski, J. Gomis-Bresco, F. Alzina, and C. M. Sotomayor Torres, Rev. Sci. Instr. 85, 034901 (2014)

“Tuning Thermal Transport in Ultrathin Silicon Membranes by Surface NanoscaleEngineering”, S. Neogi, J.S. Reparaz, L.F.C. Pereira, B. Graczykowski, M.R. Wagner, M. Sledzinska, A. Shchepetov, M. Prunnila, J. Ahopelto, C.M. Sotomayor-Torres, and D. Donadio, ACS Nano 9, 3820 (2015)

“2D phononiccrystals: Disorder matters”, Markus R. Wagner, Bartlomiej Graczykowski, Juan Sebastian Reparaz,AlexandrosEl Sachat, Marianna Sledzinska, Francesc Alzina, and Clivia M. Sotomayor Torres, Nano Lett. 16 (9),5661 (2016)

“Thermal conductivity of MoS2 polycrystalline nanomembranes”, M. Sledzinska, B. Graczykowski1, M. Placidi, D. Saleta Reig, A. El Sachat, J. S. Reparaz, F. Alzina, B. Mortazavi, R. Quey, L. Colombo,S. Roche, and C. M. Sotomayor Torres, 2D Materials 3, 035016 (2016)

“Composition dependence of the phonon strain shift coefficients in SiGe alloys revisited”, J. S. Reparaz, A. Bernardi, A. R. Goñi, M. I. Alonso, and M. Garriga, Appl. Phys. Lett. 92, 081909 (2008)

“Probing local strain and composition in Ge nanowires by means of tip-enhanced Raman scattering”, J. S. Reparaz, N. Peica, R. Kirste, A. R. Goñi, M. R. Wagner, G. Callsen, M. I. Alonso, M. Garriga, I. C. Marcus, A. Ronda, I. Berbezier, J. Maultzsch, C. Thomsen, and A Hoffmann, Nanotechnology 24, 185704 (2013)