Dynamic Light Scattering in Glassforming Aqueous Maltose
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We report results of a photon correlation spectroscopy study of the glassforming dynamics in aqueous maltose solutions of varying concentration. These measurements represent a companion study to earlier measurements conducted in aqueous glucose wherein two distinct relaxations were observed: a q-independent, viscoelastic (alpha) relaxation occurring at short times and a q-dependent 'ultraslow' mode associated with the quasi-diffusional motion of glucose clusters at long times. We find that the maltose solutions also display two distinct relaxations. However, both are q-dependent and neither appear consistent with the viscoelastic alpha relaxation. We discuss the possible origins for these two quasi-diffusional modes.
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