Neutron scattering studies of the model glass former ortho-terphenyl

By A. Toelle. 2001

189 citations recorded by the source corpus.

The van der Waals liquid ortho-terphenyl has long been used as a model system in the study of the glass transition. Motivated by mode-coupling theory, extensive experiments have been undertaken to monitor the onset of structural relaxation on microscopic time- and lengthscales. Using in particular quasielastic neutron scattering, the decay of density and tagged-particle correlations has been measured as a function of temperature, pressure and wavenumber. A consistent picture is developed, in which the mode-coupling singularity appears as a change of transport mechanism in the moderately viscous liquid, at temperatures far above the conventional (caloric) glass transition.

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Citations in the corpus

Structure and dynamics of monohydroxy alcohols—Milestones towards their microscopic understanding, 100 years after Debye (2014, background): “Prepeaks were detected for numerous hydrogen bonded liquids [142–145] including water [146] and even for a van der Waals glass former [147].”
Supercooled dynamics of glass-forming liquids and polymers under hydrostatic pressure (2005, background): “…experiments extended to higher pressures (4 GPa) than the OTP measurements; however, even over an equivalent pressure range, the dynamic structure factor of PB appears to be more sensitive to pressure than is the case for OTP (see figure 2 in Calliaux et al (2003) and figure 31 in Tölle (2001)).”