Dense cluster formation during aggregation and gelation of attractive slippery nanoemulsion droplets

Using time-resolved small angle neutron scattering, we have measured the wave-number-dependent structure factor S(q) of monodisperse nanoemulsions that aggregate and gel after we suddenly turn on a strong, short-range, slippery attraction between the droplets. At high q, peaks in S(q) appear as dens...

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Veröffentlicht in:	Physical review letters 2006-01, Vol.96 (1), p.015501-015501
Hauptverfasser:	Wilking, J N, Graves, S M, Chang, C B, Meleson, K, Lin, M Y, Mason, T G
Format:	Artikel
Sprache:	eng
Schlagworte:	AGGLOMERATION CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY DIFFUSION DROPLETS GELATION GELS MICROEMULSIONS NANOSTRUCTURES NEUTRON DIFFRACTION SMALL ANGLE SCATTERING STRUCTURE FACTORS TIME RESOLUTION
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creator	Wilking, J N Graves, S M Chang, C B Meleson, K Lin, M Y Mason, T G
description	Using time-resolved small angle neutron scattering, we have measured the wave-number-dependent structure factor S(q) of monodisperse nanoemulsions that aggregate and gel after we suddenly turn on a strong, short-range, slippery attraction between the droplets. At high q, peaks in S(q) appear as dense clusters of droplets form, and S(q) increases strongly toward low q, as these dense clusters become locked into a rigid gel network, despite the fluidity of the films between the droplets. The long-time high-q structure of nanoemulsion gels formed by slippery diffusion-limited cluster aggregation is universal in shape and remarkably independent of the droplet volume fraction, phi.
doi_str_mv	10.1103/PhysRevLett.96.015501
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subjects	AGGLOMERATION CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY DIFFUSION DROPLETS GELATION GELS MICROEMULSIONS NANOSTRUCTURES NEUTRON DIFFRACTION SMALL ANGLE SCATTERING STRUCTURE FACTORS TIME RESOLUTION
title	Dense cluster formation during aggregation and gelation of attractive slippery nanoemulsion droplets
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