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John Thrower's Homepage

Laboratory Scientist at
Department of Physics and Astronomy (IFA) 
Aarhus University  
Ny Munkegade Build. 1520 
DK-8000 Aarhus C  

Office: 1520-333
Phone: +45 8715 5584
Email: thrower@phys.au.dk  

Biography

Originating from the town of Bakewell in the centre of England, I studied Chemistry and Molecular Physics at the University of Nottingham. I subsequently obtained my PhD from Heriot-Watt University, Edinburgh under the supervision of Prof Martin McCoustra. My research focussed on the thermal and non-thermal desorption of small aromatic species from interstellar dust grain mimics based on amorphous silicates. I demonstrated the importance of grain surface morphology on thermal desorption, with realistic interstellar grains presenting high energy binding sites that lead to a delayed desorption behaviour on astrophysical timescale. My work also revealed a highly efficient desorption pathway for species bound to water ice under low energy electron irradiation resulting from energy transfer through the H-bonding network of water. Finally, through work conducted at the Central Laser Facility of the Rutherford Appleton Laboratory (RAL) in Oxfordshire I showed that photon stimulated desorption from mixed ices can lead to the injection of translationally hot molecules into the interstellar medium (ISM).

In 2009 I took up a postdoctoral research associate position at Aarhus University under the supervision of Prof. Liv Hornekær where I performed measurements demonstrating the catalytic role played by PAH molecules in H2 formation under interstellar conditions. I also derived an value for the graphite interlayer binding energy based on PAH desorption in work supported by density functional theory calculations carried by the group of Prof. Bjørk Hammer at Aarhus. Between 2010 and 2012 I was a employed as an Experienced Researcher as part of the FP7 Marie Curie ITN ("LASSIE").

I moved to the Westfälische Wilhelms-Universität Münster in Germany where I worked in the "Dynamics at Surfaces" group of Prof. Dr. Helmut Zacharias in the Physikalisches Institut. I performed low temperature thermal desorption measurements probing, for the first time, the desorption of small molecules from crystalline interstellar silicates. I also conducted a project at the free-electron laser "FLASH" at DESY in Hamburg proving the soft x-ray induced desorption of carbonaceous molecules from graphite, revealing the ejection of carbon cluster as well as a variety of product ions. I was also involved in the measurement of the energetics of femtosecond laser-induced desorption of hydrogen from graphite.

In 2018 I returned to Aarhus University and am working closely with researchers employed as part of the H2020 Marie Skłodowska-Curie ITN "EUROPAH"

Publications

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Slumstrup, L., Thrower, J. D., Schrauwen, J. G. M., Lamberts, T., Ingman, E. R., Laurinavicius, D., DeVine, J., Terwisscha van Scheltinga, J., Santos, J. C., Noble, J. A., Wenzel, G., McCoustra, M. R. S., Brown, W. A., Linnartz, H., Hornekær, L., Cuppen, H. M., Redlich, B. & Ioppolo, S. (2025). IR-Induced CO Photodesorption from Pure CO Ice and CO on Amorphous Solid Water. ACS Earth and Space Chemistry, 9(6), 1607-1621. https://doi.org/10.1021/acsearthspacechem.5c00040
Leccese, M., Jaganathan, R., Slumstrup, L., Thrower, J. D., Hornekær, L. & Martinazzo, R. (2023). Bending the rules of PAH hydrogenation: the case of corannulene. Monthly Notices of the Royal Astronomical Society, 519(4), 5567-5578. https://doi.org/10.1093/mnras/stad054
Simonsen, F. D. S., Jensen, P. A., Skov, A. W., Jaganathan, R., Thrower, J. & Hornekær, L. (2020). H2 catalysis through superhydrogenation of interstellar polycyclic aromatic hydrocarbons. I F. Salama & H. Linnartz (red.), Laboratory Astrophysics: From Observations to Interpretation (Bind 15, s. 264-266). Cambridge University Press. https://doi.org/10.1017/S1743921320000034
Thrower, J., Pantazidis, G., Scheffler, M., Simonsen, F. D. S., Jensen, P. A. & Hornekær, L. (2020). Laboratory evidence for the formation of hydrogenated fullerene molecules. I F. Salama & H. Linnartz (red.), Laboratory Astrophysics: From Observations to Interpretation (Bind 15, s. 144-147). Cambridge University Press. https://doi.org/10.1017/s1743921319007567
Campisi, D., Simonsen, F. D. S., Thrower, J. D., Jaganathan, R., Hornekær, L., Martinazzo, R. & Tielens, A. G. G. M. (2020). Superhydrogenation of pentacene: The reactivity of zigzag-edges. Physical Chemistry Chemical Physics, 22(3), 1557-1565. https://doi.org/10.1039/c9cp05440e
McCoustra, M. R. S. & Thrower, J. D. (2018). Exciton-Promoted Desorption From Solid Water Surfaces A2. I K. Wandelt (red.), Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry (s. 383-395). Elsevier. https://doi.org/10.1016/B978-0-12-409547-2.13910-1
Thrower, J. D. & Zacharias, H. (2018). Laser-Induced Processes in Thin Ices A2. I K. Wandelt (red.), Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry (s. 478-490). Elsevier. https://doi.org/10.1016/B978-0-12-409547-2.13225-1
Suhasaria, T., Thrower, J. D., Frigge, R., Roling, S., Bertin, M., Michaut, X., Fillion, J. .-H. & Zacharias, H. (2018). XUV photodesorption of carbon cluster ions and ionic photofragments from a mixed methane-water ice. Physical Chemistry Chemical Physics, 20(11), 7457-7469. https://doi.org/10.1039/c8cp00171e
Abdulgalil, A. G. M., Rosu-Finsen, A., Marchione, D., Thrower, J. D., Collings, M. P. & McCoustra, M. R. S. (2017). Electron-Promoted Desorption from Water Ice Surfaces: Neutral Gas Phase Products. ACS Earth and Space Chemistry, 1(4), 209-215. https://doi.org/10.1021/acsearthspacechem.7b00028
Suhasaria, T., Thrower, J. D. & Zacharias, H. (2017). Thermal desorption of astrophysically relevant molecules from forsterite(010). Royal Astronomical Society. Monthly Notices, 472(1), 389-399. https://doi.org/10.1093/mnras/stx1965
Marchione, D., Thrower, J. D. & McCoustra, M. R. S. (2016). Efficient electron-promoted desorption of benzene from water ice surfaces. Physical Chemistry Chemical Physics, 18(5), 4026-4034. https://doi.org/10.1039/c5cp06537b
Suhasaria, T., Thrower, J. D. & Zacharias, H. (2015). Thermal desorption of ammonia from crystalline forsterite surfaces. Royal Astronomical Society. Monthly Notices, 454(3), 3317-3327. https://doi.org/10.1093/mnras/stv2197
Abdulgalil, A. G. M., Marchione, D., Thrower, J. D., Collings, M. P., McCoustra, M. R. S., Islam, F., Palumbo, M. E., Congiu, E. & Dulieu, F. (2013). Laboratory studies of electron and ion irradiation of solid acetonitrile (CH3CN). Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 371(1994), Artikel 20110586. https://doi.org/10.1098/rsta.2011.0586
Cuylle, S., Linnartz, H. & Thrower, J. (2012). UV/Vis spectroscopy of C60 embedded in water ice. Chemical Physics Letters, 550, 79-82. https://doi.org/10.1016/j.cplett.2012.08.072
Thrower, J. D., Collings, M. P., Rutten, F. J. M. & McCoustra, M. R. S. (2011). Highly efficient electron-stimulated desorption of benzene from amorphous solid water ice. Chemical Physics Letters, 505(4-6), 106-111. https://doi.org/10.1016/j.cplett.2011.02.029
Thrower, J. D., Abdulgalil, A. G. M., Collings, M. P., McCoustra, M. R. S., Burke, D. J., Brown, W. A., Dawes, A., Holtom, P. J., Kendall, P., Mason, N. J., Jamme, F., Fraser, H. J. & Rutten, F. J. M. (2010). Photon- and electron-stimulated desorption from laboratory models of interstellar ice grains. Journal of Vacuum Science & Technology. A: International Journal Devoted to Vacuum, Surfaces, and Films, 28(4), 799-806. https://doi.org/10.1116/1.3336466
Thrower, J. D., Collings, M. P., Rutten, F. J. M. & McCoustra, M. R. S. (2009). Laboratory investigations of the interaction between benzene and bare silicate grain surfaces. Royal Astronomical Society. Monthly Notices, 394, 1510-1518.
Thrower, J. D., Collings, M. P., Rutten, F. J. M. & McCoustra, M. R. S. (2009). Thermal desorption of C6H6 from surfaces of astrophysical relevance. Journal of Chemical Physics, 131(24), 244711.
Thrower, J. D., Burke, D. J., Collings, M. P., Dawes, A., Holtom, P. D., Jamme, F., Kendall, P., Brown, W. A., Clark, I. P., Fraser, H. J., McCoustra, M. R. S., Mason, N. J. & Parker, A. W. (2008). Desorption of hot molecules from photon irradiated interstellar ices. Astrophysical Journal, 673, 1233-1239.
Thrower, J. D., Collings, M. P., McCoustra, M. R. S., Burke, D. J., Brown, W. A., Dawes, A., Holtom, P. D., Kendall, P., Mason, N. J., Jamme, F., Fraser, H. J., Clark, I. P. & Parker, A. W. (2008). Surface science investigations of photoprocesses in model interstellar ices. Journal of Vacuum Science & Technology. A: International Journal Devoted to Vacuum, Surfaces, and Films, 919-924.
Mautner, M. N., Abdelsayed, V., El-Shall, M. S., Thrower, J. D., Green, S. D., Collings, M. P. & McCoustra, M. R. S. (2006). Meteorite nanoparticles as models for interstellar grains: Synthesis and preliminary characterisation. Faraday Discussions, 103-112.
Powis, I., Thrower, J. D., Trofimov, A. B., Moskovskaya, T. E., Schirmer, J., Potts, A. W., M P Holland, D., Bruhn, F. & Karlsson, L. (2005). An experimental and theoretical study of the photoelectron spectrum of hydrogen selenide. Chemical Physics, 315, 121-132.