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http://hdl.handle.net/2289/4648Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Bandyopadhyay, Ranjini | - |
| dc.contributor.author | Liang, Dennis | - |
| dc.contributor.author | Yardimci, H. | - |
| dc.contributor.author | Sessoms, D.A. | - |
| dc.date.accessioned | 2012-06-09T09:29:24Z | - |
| dc.date.available | 2012-06-09T09:29:24Z | - |
| dc.date.issued | 2004 | - |
| dc.identifier.citation | Physical Review Letters, 2002, vol93, p228302-1 | en |
| dc.identifier.issn | 0031-9007 | - |
| dc.identifier.issn | 1079-7114 (Online) | - |
| dc.identifier.uri | http://hdl.handle.net/2289/4648 | - |
| dc.description | Open Access. | en |
| dc.description.abstract | Multispeckle x-ray photon correlation spectroscopy was employed to characterize the slow dynamics of a colloidal suspension formed by highly-charged, nanometer-sized disks. At scattering wave vectors $q$ corresponding to interparticle length scales, the dynamic structure factor follows a form $f(q,t) \sim \exp[-(t/\tau)^{\beta}$], where $\beta \approx$ 1.5. The characteristic relaxation time $\tau$ increases with the sample age $t_a$ approximately as $\tau \sim t_a^{1.8}$ and decreases with $q$ approximately as $\tau \sim q^{-1}$. Such a compressed exponential decay with relaxation time that varies inversely with $q$ is consistent with recent models that describe the dynamics in disordered elastic media in terms of strain from random, local structural rearrangements. The amplitude of the measured decay in $f(q,t)$ varies with $q$ in a manner that implies caged particle motion at short times. The decrease in the range of this motion and an increase in suspension conductivity with increasing $t_a$ indicate a growth in the interparticle repulsion as the mechanism for internal stress development implied by the models. | en |
| dc.language.iso | en | en |
| dc.publisher | American Physical Society | en |
| dc.relation.uri | http://arxiv.org/abs/cond-mat/0410376 | en |
| dc.relation.uri | http://dx.doi.org/10.1103/PhysRevLett.93.228302 | en |
| dc.rights | 2004 American Physical Society | en |
| dc.title | Evolution of particle-scale dynamics in an aging clay suspension | en |
| dc.type | Article | en |
| Appears in Collections: | Research Papers (SCM) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2004_PhysRevLett_V93_p228302.pdf Restricted Access | Open Access | 166.98 kB | Adobe PDF | View/Open Request a copy |
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