Preprints
https://doi.org/10.5194/acp-2021-335
https://doi.org/10.5194/acp-2021-335

  03 May 2021

03 May 2021

Review status: this preprint is currently under review for the journal ACP.

The ice-vapor interface during growth and sublimation

Maria Cascajo-Castresana1,a, Sylvie Morin1,2, and Alexander Bittner1,3 Maria Cascajo-Castresana et al.
  • 1CIC nanoGUNE (BRTA), Av. Tolosa 76, 20018 Donostia-San Sebastián, ES-20018, Spain
  • 2Department of Chemistry, York University, Toronto, ON M3J 1P3, Canada
  • 3Ikerbasque Basque Foundation for Science, 48009 Bilbao, ES-48009, Spain
  • apresent address: Tecnalia Research & Innovation, Paseo Mikeletegi 2, 20009 Donostia-San Sebastián, Spain

Abstract. We employed Environmental Scanning Electron Microscopy (ESEM) in low humidity atmosphere to study the complete scenario of ice growth, coalescence of crystallites, polycrystalline film morphology and sublimation, in the temperature range of −10 ºC to −20 ºC. First, individual ice crystals grow in the shape of micron-sized hexagonal columns with stable basal faces. Their coalescence during further growth forms thick polycrystalline films, consisting of large grains separated by grain boundaries. The latter are composed of 1 to 3 µm wide pores, which are attributed to the coalescence of defective crystallite surfaces. Sublimation of isolated crystals and of films is defect-driven, and grain boundaries play a decisive role. A scallop-like concave structure forms, limited by sharp ridges, which are terminated by nanoscale asperities.

Maria Cascajo-Castresana et al.

Status: open (until 28 Jun 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Maria Cascajo-Castresana et al.

Data sets

Replication Data for "The Ice-Vapor Interface During Growth and Sublimation" M. Cascajo, S. Morin, A. M. Bittner https://doi.org/10.5683/SP2/S2HBAR

Video supplement

Replication Data for "The Ice-Vapor Interface During Growth and Sublimation" M. Cascajo, S. Morin, A. M. Bittner https://doi.org/10.5683/SP2/S2HBAR

Maria Cascajo-Castresana et al.

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Short summary
Ice growth has been studied extensively using standard microscopy methods, However, real time microscopic observations of ice nucleation and growth are not extensive and require electron microscopy in water vapour (ESEM). This technique reveals a plethora of micromorphologies. New are holes on the ice surface, located inside grain boundaries, and nanoscale asperities, which we found during sublimation.
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