Title: Two-dimensional glass transition–like behavior of Janus particle–laden interface

Journal Article · · Rheologica Acta

Abstract Understanding the interactive behavior of Janus particles (JPs) is a growing field of research. The enhancement in binding energy, in comparison to homogenous particles, and the dual characteristic of JPs open up new possibilities for novel applications. In many such applications, interfacial materials become subjected to flows that produce dilational and shear stresses. Therefore, it is important to understand the impact that the Janus character brings to interfaces. In this work, we study the microstructure of two-dimensional (2D) JP monolayers formed at the air–water interface and examine the shear viscoelasticity with an interface rheometer that was adapted for in situ surface pressure control via a Langmuir trough. We extend concepts from bulk rheology to data obtained from interfacial rheology as a tool to understand and predict the monolayer’s viscoelastic behavior. Finally, by calculating the time relaxation spectrum from the measured 2D dynamic moduli, we conclude that a phenomenon similar to glass transition is taking place by analogy.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States); Universities of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
American Chemical Society, Petroleum Research Fund; USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO)
Grant/Contract Number:
EE0009285
OSTI ID:
1962897
Journal Information:
Rheologica Acta, Journal Name: Rheologica Acta Journal Issue: 4 Vol. 62; ISSN 0035-4511
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
Germany
Language:
English

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