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Cryo-XPS: probing intact interfaces in nature and life
Umeå University, Faculty of Science and Technology, Department of Chemistry.
Umeå University, Faculty of Science and Technology, Department of Chemistry.
2017 (English)In: Surface and Interface Analysis, ISSN 0142-2421, E-ISSN 1096-9918, Vol. 49, no 4, p. 349-356Article in journal (Refereed) Published
Abstract [en]

Experimental studies of solid–aqueous solution interfaces are of great importance for reaching a better chemical understanding ofinterfacial phenomena at the molecular level. This perspective article presents a recently developed approach for investigation ofintact interfaces, based on fast freezing of centrifuged wet pastes followed by traditional XPS measurements at liquid nitrogentemperatures. Sample preparation and handling protocols, applicable to any suspension or gel, are discussed in detail. For mineralsuspensions, cryogenic XPS is an important complement to traditional analyses of supernatant solutions and dry solids that iscapable of revealing novel insights of the electrical double layer in terms of structure and composition. It can be used to studychanges in the biochemistry of bacterial cell walls as influenced by external stimuli, and interfacial features related tobiocompatibility of implant materials. Herein we review how the technique has been applied to minerals in electrolyte solutions,intact bacterial surfaces, and biomaterial interfaces in biologically relevant media, and highlight some future requirements fordevelopment of interface analysis methodologies.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017. Vol. 49, no 4, p. 349-356
Keywords [en]
cryogenic XPS, solid–aqueous solution interface, electrical double layer, cell wall composition
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-128825DOI: 10.1002/sia.6025ISI: 000397496800016OAI: oai:DiVA.org:umu-128825DiVA, id: diva2:1056768
Available from: 2016-12-15 Created: 2016-12-15 Last updated: 2018-06-09Bibliographically approved

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Shchukarev, AndreyRamstedt, Madeleine

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