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Laboratory-based sticking coefficients for ices on a variety of small-grain analogues


Abundances and the partitioning between ices and gases in gas–grain chemistry are governed by adsorption and desorption on grains. Understanding of astrophysical observations relies on laboratory measurements of adsorption and desorption rates on dust grains analogues. On flat surfaces, gas adsorption probabilities (or sticking coefficients) have been found to be close to unity for most gases1,2,3. Here we report a strong decrease in the sticking coefficients of H2O and CO2 on substrates more akin to cosmic dust, such as submicrometre-sized particles of carbon and olivine, bare or covered with ice. This effect results from the local curvature of the grains, and then extends to larger grains made of aggregated small particles, such as fluffy or porous dust in more evolved media (for example, circumstellar disks). The main astrophysical implication is that accretion rates of gases are reduced accordingly, slowing the growth of cosmic ices. Furthermore, volatile species that are not adsorbed on a grain at their freeze-out temperature will persist in the gas phase, which will impact gas–ice partitions. We also found that thermal desorption of H2O is not modified by grain size, and thus the temperature of snowlines should be independent of the dust size distribution.

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Fig. 1: Selected electron microscopy images of the substrates.
Fig. 2: Sticking coefficients of H2O and CO2 at 20 K as a function of the substrate size for different substrates.
Fig. 3: Sticking coefficients of CO2 on H2O ice at 20 K as a function of the substrate size for different substrates.

Data availability

A text version of Table 1 is available at All of the datasets generated and analysed during the current study are available from the corresponding author on reasonable request.


  1. 1.

    Smith, R. S. & Kay, B. D. Molecular beam studies of kinetic processes in nanoscale water films. Surf. Rev. Lett. 4, 781–797 (1997).

    ADS  Article  Google Scholar 

  2. 2.

    Chaabouni, H. et al. Sticking coefficient of hydrogen and deuterium on silicates under interstellar conditions. Astron. Astrophys. 358, A128 (2012).

    Article  Google Scholar 

  3. 3.

    He, J., Acharyya, K. & Vidali, G. Sticking of molecules on nonporous amorphous water ice. Astrophys. J. 823, 56 (2016).

    ADS  Article  Google Scholar 

  4. 4.

    Weingartner, J. C. & Draine, B. T. Dust grain-size distributions and extinction in the Milky Way, Large Magellanic Cloud, and Small Magellanic Cloud. Astrophys. J. 548, 296–309 (2001).

    ADS  Article  Google Scholar 

  5. 5.

    Köhler, M. et al. Dust coagulation processes as constrained by far-infrared. Astron. Astrophys. 548, A61 (2012).

    Article  Google Scholar 

  6. 6.

    Blum, J. Dust evolution in protoplanetary discs and the formation of planetesimals: what have we learned from laboratory experiments? Space Sci. Rev. 214, 52 (2018).

    ADS  Article  Google Scholar 

  7. 7.

    Linnartz, H., Ioppolo, S. & Fedoseev, G. Atom addition reactions in interstellar ice analogues. Int. Rev. Phys. Chem. 34, 205–237 (2015).

    Article  Google Scholar 

  8. 8.

    Oberg, K. Photochemistry and astrochemistry: photochemical pathways to interstellar complex organic molecules. Chem. Rev. 116, 9631–9663 (2016).

    Article  Google Scholar 

  9. 9.

    Potapov, A., Jäger, C., Henning, T., Jonusas, M. & Krim, L. The formation of formaldehyde on interstellar carbonaceous grain analogs by O/H atom addition. Astrophys. J. 846, 131 (2017).

    ADS  Article  Google Scholar 

  10. 10.

    Mennella, V. HD formation by abstraction of H/D chemisorbed in carbon grains with D/H atoms under simulated interstellar conditions. Astrophys. J. 684, L25–L28 (2008).

    ADS  Article  Google Scholar 

  11. 11.

    Maté, B., Jimenez-Redondo, M., Pelaez, R., Tanarro, I. & Herrero, V. Desorption of N2, CO, CH4 and CO2 from interstellar carbonaceous dust analogues. Mon. Not. R. Astron. Soc. 490, 2936–2947 (2019).

    ADS  Article  Google Scholar 

  12. 12.

    Potapov, A., Theulé, P., Jäger, C. & Henning, T. Evidence of surface catalytic effect on cosmic dust grain analogs: the ammonia and carbon dioxide surface reaction. Astrophys. J. 878, L20 (2019).

    ADS  Article  Google Scholar 

  13. 13.

    Mautner, M. N. et al. Meteorite nanoparticles as models for interstellar grains: synthesis and preliminary characterisation. Faraday Discuss. 133, 103–112 (2006).

    ADS  Article  Google Scholar 

  14. 14.

    He, J., Frank, P. & Vidali, G. Interaction of hydrogen with surfaces of silicates: single crystal vs. amorphous. Phys. Chem. Chem. Phys. 13, 15803–15809 (2011).

    Article  Google Scholar 

  15. 15.

    Potapov, A., Jäger, C. & Henning, T. Temperature programmed desorption of water ice from the surface of amorphous carbon and silicate grains as related to planet-forming disks. Astrophys. J. 865, 58 (2018).

    ADS  Article  Google Scholar 

  16. 16.

    Zubko, V., Dwek, E. & Arendt, R. G. Interstellar dust models consistent with extinction, emission and abundance constraints. Astrophys. J. Suppl. Ser. 152, 211–249 (2004).

    ADS  Article  Google Scholar 

  17. 17.

    Chakarov, D. V., Österlund, L. & Kasemo, B. Water adsorption on graphite (0001). Vacuum 46, 1109–1112 (1995).

    ADS  Article  Google Scholar 

  18. 18.

    Souda, R. Substrate and surfactant effects on the glass-liquid transition of thin water films. J. Phys. Chem. B 110, 17524–17530 (2006).

    Article  Google Scholar 

  19. 19.

    Noble, J. A., Congiu, E., Dulieu, F. & Fraser, H. J. Thermal desorption characteristics of CO, O2 and CO2 on non-porous water, crystalline water and silicate surfaces at submonolayer and multilayer coverages. Mon. Not. R. Astron. Soc. 421, 768–779 (2012).

    ADS  Google Scholar 

  20. 20.

    Hoose, C. & Möhler, O. Heterogeneous ice nucleation on atmospheric aerosols: a review of results from laboratory experiments. Atmos. Chem. Phys. 12, 9817–9854 (2012).

    ADS  Article  Google Scholar 

  21. 21.

    Fisher, L. R., Gamble, R. A. & Middlehurst, J. The Kelvin equation and the capillary condensation of water. Nature 290, 575–576 (1981).

    ADS  Article  Google Scholar 

  22. 22.

    Dusek, U. et al. Size matters more than chemistry for cloud-nucleating ability of aerosol particles. Science 312, 1375–1378 (2006).

    ADS  Article  Google Scholar 

  23. 23.

    Xu, Y. et al. Selective nucleation of ice crystals depending on the inclination angle of nanostructures. Phys. Chem. Chem. Phys. 22, 1168–1173 (2020).

    Article  Google Scholar 

  24. 24.

    Al-Halabi, A., Fraser, H. J., Kroes, G. J. & Van Dishoeck, E. F. Adsorption of CO on amorphous water-ice surfaces. Astron. Astrophys. 422, 777–791 (2004).

    ADS  Article  Google Scholar 

  25. 25.

    Buch, V., Delzeit, L., Blackledge, C. & Devlin, J. P. Structure of the ice nanocrystal surface from simulated versus experimental spectra of adsorbed CF4. J. Phys. Chem. 100, 3732–3744 (1996).

    Article  Google Scholar 

  26. 26.

    Buch, V. & Czerminski, R. Eigenstates of a quantum-mechanical particle on a topologically disordered surface: H(D) atom physisorbed on an amorphous ice cluster (H2O)115. J. Chem. Phys. 95, 6026–6038 (1991).

    ADS  Article  Google Scholar 

  27. 27.

    Cuppen, H. M. et al. Grain surface models and data for astrochemistry. Space Sci. Rev. 212, 1–58 (2017).

    ADS  Article  Google Scholar 

  28. 28.

    Henning, T. & Semenov, D. Chemistry in protoplanetary disks. Chem. Rev. 113, 9016–9042 (2013).

    Article  Google Scholar 

  29. 29.

    Redman, M. P., Rawlings, J. M. C., Nutter, D. J. & Williams, D. A. Molecular gas freeze-out in the pre-stellar core L1689B. Mon. Not. R. Astron. Soc. 337, L17–L21 (2002).

    ADS  Article  Google Scholar 

  30. 30.

    Krijt, S., Ciesla, F. J. & Bergin, E. A. Tracing water vapor and ice during dust growth. Astrophys. J. 833, 285 (2016).

    ADS  Article  Google Scholar 

  31. 31.

    Marhaba, I. et al. Aircraft and MiniCAST soot at the nanoscale. Combust. Flame 204, 278–289 (2019).

    Article  Google Scholar 

  32. 32.

    Parent, P., Laffon, C., Mangeney, C., Bournel, F. & Tronc, M. Structure of the water ice surface studied by x-ray absorption spectroscopy at the O K-edge. J. Chem. Phys. 117, 10842–10851 (2002).

    ADS  Article  Google Scholar 

  33. 33.

    He, J. et al. The effective surface area of amorphous solid water measured by the infrared absorption of carbon monoxide. Astrophys. J. 878, 94 (2019).

    ADS  Article  Google Scholar 

  34. 34.

    Grimmelmann, E. K., Tully, J. C. & Cardillo, M. J. Hard-cube model analysis of gas-surface energy accommodation. J. Chem. Phys. 72, 1039–1043 (1980).

    ADS  Article  Google Scholar 

  35. 35.

    Bolton, K., Svanberg, M. & Pettersson, J. B. C. Classical trajectory study of argon-ice collision dynamics. J. Chem. Phys. 110, 5380–5391 (1999).

    ADS  Article  Google Scholar 

  36. 36.

    Kohrt, C. & Gomer, R. Adsorption of CO on the (110) plane of tungsten; temperature dependence of the sticking coefficient and absolute surface coverages. Surf. Sci. 40, 71–84 (1973).

    ADS  Article  Google Scholar 

  37. 37.

    Al-Halabi, A., Kleyn, A. W., Van Dishoeck, E. F. & Kroes, G. J. Sticking of hydrogen atoms to crystalline ice surfaces: dependence on incidence energy and surface temperature. J. Phys. Chem. B 106, 6515–6522 (2002).

    Article  Google Scholar 

  38. 38.

    Buch, V. & Zhang, Q. Sticking probability of H and D atoms on amorphous ice: a computational study. Astrophys. J. 379, 647–652 (1991).

    ADS  Article  Google Scholar 

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We thank I. Marhaba for her help during the preliminary XPS experiments, and F.-X. Ouf for providing the MiniCAST samples.

Author information




C.L. and P.P. conceived, performed, analysed and interpreted the XPS experiments. O.G. provided and prepared most of the samples, and carried out the X-ray diffraction experiments. D.F. and O.G. performed and analysed the scanning and transmission electron microscopy images. P.P. wrote the manuscript. All authors contributed ideas to this Letter.

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Correspondence to P. Parent.

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The authors declare no competing interests.

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Peer review information Nature Astronomy thanks Kinsuk Acharyya, Guido Condorelli and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.

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Supplementary information

Supplementary Information

Supplementary Information 1–5, Figs. 1–5 and references.

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Laffon, C., Ferry, D., Grauby, O. et al. Laboratory-based sticking coefficients for ices on a variety of small-grain analogues. Nat Astron 5, 445–450 (2021).

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