Autoren:	Niu, Ran Heidt, Sabrina Sreij, Ramsia Dekker, Riande I. Hofmann, Maximilian Palberg, Thomas
Titel:	Formation of a transient amorphous solid in low density aqueous charged sphere suspensions
Online-Publikationsdatum:	21-Okt-2022
Erscheinungsdatum:	2017
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	Colloidal glasses formed from hard spheres, nearly hard spheres, ellipsoids and platelets or their attractive variants, have been studied in great detail. Complementing and constraining theoretical approaches and simulations, the many different types of model systems have significantly advanced our understanding of the glass transition in general. Despite their early prediction, however, no experimental charged sphere glasses have been found at low density, where the competing process of crystallization prevails. We here report the formation of a transient amorphous solid formed from charged polymer spheres suspended in thoroughly deionized water at volume fractions of 0.0002–0.01. From optical experiments, we observe the presence of short-range order and an enhanced shear rigidity as compared to the stable polycrystalline solid of body centred cubic structure. On a density dependent time scale of hours to days, the amorphous solid transforms into this stable structure. We further present preliminary dynamic light scattering data showing the evolution of a second slow relaxation process possibly pointing to a dynamic heterogeneity known from other colloidal glasses and gels. We compare our findings to the predicted phase behaviour of charged sphere suspensions and discuss possible mechanisms for the formation of this peculiar type of colloidal glass.
DDC-Sachgruppe:	530 Physik 530 Physics
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 08 Physik, Mathematik u. Informatik
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-8137
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Nutzungsrechte:	CC BY
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by/4.0/
Zeitschrift:	Scientific reports 7
Seitenzahl oder Artikelnummer:	Art. 17044
Verlag:	Nature Publishing Group
Verlagsort:	London
Erscheinungsdatum:	2017
ISSN:	2045-2322
URL der Originalveröffentlichung:	http://dx.doi.org/10.1038/s41598-017-17106-6
DOI der Originalveröffentlichung:	10.1038/s41598-017-17106-6
Enthalten in den Sammlungen:	DFG-OA-Publizieren (2012 - 2017)