Eklund, TobiasInstitute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany; European XFEL, Holzkoppel 4 22869, Schenefeld, Germany
(författare)
Pore-collapse in amorphous solid water: A dynamics study
Vapor-deposited amorphous ice, so-called amorphous solid water, exhibits complex structural and morphological transformations upon heating. A network of micropores, present at the deposition temperature (80 K), collapses at 100–145 K, and a glass transition takes place simultaneously above 120 K. Here, we separate the two processes by allowing the micropores to collapse upon heating, which is monitored by small-angle x-ray scattering experiments. The combined micropore collapse and glass transition dynamics are studied using x-ray photon correlation spectroscopy. After cooling back down and heating a second time, we see remaining pores collapsing only near Tg. Our analysis reveals both diffusive and ballistic processes attributed to pore collapse dynamics. Fast processes (∼100 Å2/s) occur only when both micropore collapse and glass transition are simultaneously at play. In other words, both processes impact on each other and lead to a speed-up. The glass transition dynamics mainly features a slow diffusive process with a diffusion coefficient of around 1 Å2/s and lower. This value is in nice agreement with other work on thin and on bulk samples.
Tonauer, Christina M.Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; Institute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria
(författare)
Yamashita, KeishiroInstitute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria
(författare)
Giebelmann, JohannesInstitute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria
(författare)
Fidler, Lilli RuthInstitute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria
(författare)
Karina, Aigerim,1996-Stockholms universitet,Fysikum,Department of Physics, Albanova University Center, Stockholm University, SE-10691 Stockholm, Sweden(Swepub:su)aika2500
(författare)
Li, HailongMax Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
(författare)
Kraft, LouisaInstitute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
(författare)
Berner, FionaInstitute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
(författare)
Gießelmann, Niels C.Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany; Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
(författare)
Ladd-Parada, Marjorie,1985-Stockholms universitet,KTH,Glykovetenskap,Department of Physics, Albanova University Center, Stockholm University, SE-10691 Stockholm, Sweden,Fysikum,KTH Royal Institute of Technology, Sweden(Swepub:su)mala5917
(författare)
Perakis, FivosDepartment of Physics, Albanova University Center, Stockholm University, SE-10691 Stockholm, Sweden
(författare)
Loerting, ThomasInstitute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria
(författare)
Amann-Winkel, KatrinInstitute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
(författare)
Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany; European XFEL, Holzkoppel 4 22869, Schenefeld, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; Institute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria
(creator_code:org_t)
Sammanhörande titlar
Ingår i:Journal of Chemical Physics164:10021-96061089-7690