Scattering of disklike particle suspensions: Evidence for repulsive interactions and large length scale structure from static light scattering and ultra-small-angle neutron scattering

Surita Bhatia; John Barker; Ahmed Mourchid

doi:10.1021/la0265732

Scattering of disklike particle suspensions: Evidence for repulsive interactions and large length scale structure from static light scattering and ultra-small-angle neutron scattering

Surita Bhatia
, John Barker
, Ahmed Mourchid

Chemistry

Stony Brook University

National Institute of Standards and Technology
CNRS and Rhodia

Research output: Contribution to journal › Letter › peer-review

68 Scopus citations

Abstract

We present static light scattering results for Laponite suspensions. Analyzing our data using the Zimm technique, we measure a second virial coefficient of 6.0 × 10^-23 m³ at an ionic strength of 10^-4 M. Both results agree well with recent theories and computations for the thermodynamics of hard disks. Our data support the conclusion that the classical Onsager result underestimates the repulsive contribution in discotic systems. We also present neutron scattering results at very low q which conclusively confirm the existence of large-scale structure in Laponite gels above the isotropic-nematic transition.

Original language	English
Pages (from-to)	532-535
Number of pages	4
Journal	Langmuir
Volume	19
Issue number	3
DOIs	https://doi.org/10.1021/la0265732
State	Published - Feb 4 2003

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title = "Scattering of disklike particle suspensions: Evidence for repulsive interactions and large length scale structure from static light scattering and ultra-small-angle neutron scattering",

abstract = "We present static light scattering results for Laponite suspensions. Analyzing our data using the Zimm technique, we measure a second virial coefficient of 6.0 × 10-23 m3 at an ionic strength of 10-4 M. Both results agree well with recent theories and computations for the thermodynamics of hard disks. Our data support the conclusion that the classical Onsager result underestimates the repulsive contribution in discotic systems. We also present neutron scattering results at very low q which conclusively confirm the existence of large-scale structure in Laponite gels above the isotropic-nematic transition.",

author = "Surita Bhatia and John Barker and Ahmed Mourchid",

year = "2003",

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doi = "10.1021/la0265732",

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T1 - Scattering of disklike particle suspensions

T2 - Evidence for repulsive interactions and large length scale structure from static light scattering and ultra-small-angle neutron scattering

AU - Bhatia, Surita

AU - Barker, John

AU - Mourchid, Ahmed

PY - 2003/2/4

Y1 - 2003/2/4

N2 - We present static light scattering results for Laponite suspensions. Analyzing our data using the Zimm technique, we measure a second virial coefficient of 6.0 × 10-23 m3 at an ionic strength of 10-4 M. Both results agree well with recent theories and computations for the thermodynamics of hard disks. Our data support the conclusion that the classical Onsager result underestimates the repulsive contribution in discotic systems. We also present neutron scattering results at very low q which conclusively confirm the existence of large-scale structure in Laponite gels above the isotropic-nematic transition.

AB - We present static light scattering results for Laponite suspensions. Analyzing our data using the Zimm technique, we measure a second virial coefficient of 6.0 × 10-23 m3 at an ionic strength of 10-4 M. Both results agree well with recent theories and computations for the thermodynamics of hard disks. Our data support the conclusion that the classical Onsager result underestimates the repulsive contribution in discotic systems. We also present neutron scattering results at very low q which conclusively confirm the existence of large-scale structure in Laponite gels above the isotropic-nematic transition.

UR - https://www.scopus.com/pages/publications/0037418085

U2 - 10.1021/la0265732

DO - 10.1021/la0265732

M3 - Letter

SN - 0743-7463

VL - 19

SP - 532

EP - 535

JO - Langmuir

JF - Langmuir

IS - 3

ER -

Scattering of disklike particle suspensions: Evidence for repulsive interactions and large length scale structure from static light scattering and ultra-small-angle neutron scattering

Abstract

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