guest ::
| Home > Publications database > Pore-collapse in amorphous solid water: A dynamics study |
| Home > Publications database > Pore-collapse in amorphous solid water: A dynamics study |
| Journal Article | PUBDB-2026-00923 |
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
2026
American Institute of Physics
Melville, NY
This record in other databases:
Please use a persistent id in citations: doi:10.1063/5.0305153 doi:10.3204/PUBDB-2026-00923
Abstract: 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 $T$$_g$. Our analysis reveals both diffusive and ballistic processes attributed to pore collapse dynamics. Fast processes (∼100 Å$^2$/s) occur only when both micropore collapse and glass transition are simultaneously at play. In other words, both processes impact on each other and lead to a speed-up. The glass transition dynamics mainly features a slow diffusive process with a diffusion coefficient of around 1 Å$^2$/s and lower. This value is in nice agreement with other work on thin and on bulk samples.
; 
; 
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
|
The record appears in these collections: |
PDF
PDF (PDFA)