Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Slow dynamics of hydration water and the trehalose dynamical transition
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 32019 (English)In: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 282, p. 617-625Article in journal (Refereed) Published
Abstract [en]

We present results from molecular dynamics simulations of a solution of water and trehalose, a cryoprotecting disaccharide, upon cooling. We focus our attention on both the dynamics of hydration water and of the trehalose. Hydration water presents two slow relaxations. One is the a relaxation typical of glass formers and the second one is a long relaxation that was also found in proteins hydration water and appears coupled to the movement of the surface of trehaloses. Below 280 K trehalose aggregates and upon further cooling we find a dynamical transition for the trehalose aggregate at around 250 K similar to the well known Protein Dynamical Transition. When this transition happens the long relaxation time has a dynamical crossover. We hypothesize that this dynamical transition is a general feature that can be found not only in proteins but also in aggregates that interact with water and that have a flexible structure. In fact this feature has already been found not only in proteins hydration water but also in a colloidal microgel. In the known cases, including the one that we present here, water enhances movements of the surface of these aggregates above a certain temperature. The temperature of this dynamical transition ranges between 260 K and 220 K in all known cases.

Place, publisher, year, edition, pages
2019. Vol. 282, p. 617-625
Keywords [en]
Hydration water, Glassy dynamics, Trehalose, Dynamical transition
National Category
Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-169243DOI: 10.1016/j.molliq.2019.02.088ISI: 000465060400064OAI: oai:DiVA.org:su-169243DiVA, id: diva2:1323778
Available from: 2019-06-12 Created: 2019-06-12 Last updated: 2019-06-12Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Search in DiVA

By author/editor
Camisasca, Gaia
By organisation
Department of Physics
In the same journal
Journal of Molecular Liquids
Chemical SciencesPhysical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 2 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf