Publication Date

3-23-2018

Department

Ames Laboratory; Physics and Astronomy; Materials Science and Engineering

Campus Units

Ames Laboratory, Materials Science and Engineering, Physics and Astronomy

Report Number

IS-J 9629

DOI

10.1002/admi.201701149

Journal Title

Advanced Materials Interfaces

Volume Number

5

Issue Number

6

First Page

1701149

Abstract

It is shown that magnetite nanoparticles (MagNPs) grafted with polyethylene glycol (PEG) self‐assemble and short‐range‐order as 2D films at surfaces of aqueous suspensions by manipulating salt concentrations. Synchrotron X‐ray reflectivity and grazing‐incidence small angle X‐ray scattering studies reveal that K2CO3 induces the migration of the PEG‐MagNPs to the liquid/vapor interface to form a Gibbs layer of monoparticle in thickness. As the salt concentration and/or nanoparticle concentration increase, the surface‐adsorbed nanoparticles become more organized. And further increase in salt concentration leads to the growth of an additional incomplete nanoparticle layer contiguous to the first one at the vapor/liquid interface that remains intact.

Language

en

Department of Energy Subject Categories

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY

Available for download on Tuesday, January 22, 2019

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