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Title: Transition in Dynamics as Nanoparticles Jam at the Liquid/Liquid Interface

Journal Article · · Nano Letters
 [1];  [1];  [1];  [2];  [1];  [1]; ORCiD logo [1]; ORCiD logo [3]
  1. Univ. of Massachusetts, Amherst, MA (United States)
  2. Qingdao Univ. of Science and Technology (People's Republic of China)
  3. Univ. of Massachusetts, Amherst, MA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Beijing Univ. of Chemical Technology (China)

Nanoparticles (NPs) segregated to the liquid/liquid interface form disordered or liquid-like assemblies that show diffusive motions in the plane of the interface. As the areal density of NPs at the interface increases, the available interfacial area decreases, and the interfacial dynamics of the NP assemblies change when the NPs jam. In this work, dynamics associated with jamming was investigated by X-ray photon correlation spectroscopy. Water-in-toluene emulsions, formed by a self-emulsification at the liquid/liquid interface and stabilized by ligand-capped CdSe–ZnS NPs, provided a simple, yet powerful platform, to investigate NP dynamics. In contrast to a single planar interface, these emulsions increased the number of NPs in the incident beam and decreased the absorption of X-rays in comparison to the same path length in pure water. A transition from diffusive to confined dynamics was manifested by intermittent dynamics, indicating a transition from a liquid-like to a jammed state.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231; FG02-04ER46126
OSTI ID:
1437471
Journal Information:
Nano Letters, Vol. 17, Issue 11; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (4)

Nanoparticle Assembly at Liquid-Liquid Interfaces: From the Nanoscale to Mesoscale journal July 2018
Building Reconfigurable Devices Using Complex Liquid–Fluid Interfaces journal February 2019
A Cast Net Thrown onto an Interface: Wrapping 3D Objects with an Interfacially Jammed Amphiphilic Sheet journal April 2020
The flow behaviors of nanoparticle‐stabilized bubbles in microchannel: Influence of surface hardening journal November 2019

Figures / Tables (8)


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