Abstract
Critical reading of the dielectric method and data in the paper [W. Huang and R. Richert, J. Chem. Phys. 130, 194509 (2009)]10.1063/1.3139519 showed that (i) the large inter-electrode area of the Teflon spacer used in the dielectric cell affected the spectral data and (ii) the measured Δɛ of propylene carbonate after making the spacer area correction is 1.8-times the known value, indicating errors from unknown sources. This puts into question their support for the dynamic heterogeneity view, and their inference on the magnitude of configurational heat capacity.
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