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Glassy Behavior of a Tin Dioxide Nanoparticle Suspension
journal contribution
posted on 2015-12-01, 00:00 authored by Atsumi Wakabayashi, Tatsuhiko Goto, Toshiaki Dobashi, Yasuyuki MakiDilute suspensions of charged colloidal
particles with a short-range
attraction and long-range repulsion can exhibit a variety of arrested
states. In many applications using suspensions of charged nanoparticles,
the optimization of the process requires the understanding of the
mechanism underlying the stability and the rheological properties
of the suspensions. In an attempt to clarify the solidification mechanism
for dilute suspensions of tin dioxide (SnO2) nanoparticles,
we present dynamic viscoelasticity, dynamic and static light scattering,
and small-angle X-ray scattering experiments on a SnO2 nanoparticle
suspension with a nanoparticle concentration of 25.0 wt % (volume
fraction φ = 0.045). The behaviors of the observed dynamic and
static structure factors reveal that the aging of SnO2 nanoparticles
is Wigner glassy rather than gel-like.