2020
DOI: 10.1021/acs.jpcb.0c07056
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Ion-Mediated Cross-linking of Biopolymers Confined at Liquid/Liquid Interfaces Probed by In Situ High-Energy Grazing Incidence X-ray Photon Correlation Spectroscopy

Abstract: As manifested in biological cell membranes, the confinement of chemical reactions at the 2D interfaces significantly improves the reaction efficacy. The interface between two liquid phases is used in various key processes in industries, such as in food emulsification and floatation. However, monitoring the changes in the mechanics and dynamics of molecules confined at the liquid/liquid interfaces still remains a scientific challenge because it is nontrivial to access the interface buried under a liquid phase. … Show more

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Cited by 6 publications
(2 citation statements)
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“…For instance, dynamics of samples in dedicated sample environments for experiments at extreme condition, such as diamond anvil cells for high-pressure research, will become accessible due to the lower absorption of X-rays at higher energies. Recent experiments demonstrated already XPCS on biopolymers at liquid-liquid interfaces [194] and the diffusion of colloidal particles on confined geometries [195,196] using an X-ray energy of 21 keV. Furthermore, growth processes at interfaces on atomic length scales have been recently demontrated [197,198].…”
Section: High-energy Xpcsmentioning
confidence: 99%
“…For instance, dynamics of samples in dedicated sample environments for experiments at extreme condition, such as diamond anvil cells for high-pressure research, will become accessible due to the lower absorption of X-rays at higher energies. Recent experiments demonstrated already XPCS on biopolymers at liquid-liquid interfaces [194] and the diffusion of colloidal particles on confined geometries [195,196] using an X-ray energy of 21 keV. Furthermore, growth processes at interfaces on atomic length scales have been recently demontrated [197,198].…”
Section: High-energy Xpcsmentioning
confidence: 99%
“…In GI geometry, the glancing incident angle enhances the scattered intensity due to the extended beam projection on the thin film sample . There are several publications where GI-XPCS was used to measure the dynamics of thin soft matter systems on surfaces and at interfaces or growth mechanisms on various surfaces. In these examples, conditions were chosen such that the investigation concentrated on the examination of surface scattering only, i.e., via the generation of a dominantly reflected signal. , However, many questions in interface science in the context of thin films arise due to mechanisms originating within the bulk of the thin film that are additionally influenced by the interfaces toward the substrate and their surroundings. To examine the dynamics arising from the bulk of the film, several different scattering terms need to be taken into account, and the interpretation of such GI data in the context of XPCS is not straightforward.…”
Section: Introductionmentioning
confidence: 99%