Two challenging scientific disciplines, ie, the physics of glasses [Anderson, Science 267,
1615 (1995); Kennedy and Norman, Science 309, 75 (2005)] and interface chemistry …

The technique of X‐ray Photon Correlation Spectroscopy (XPCS) is reviewed as a method
for studying the relatively slow dynamics of materials on time scales ranging from …

Surface self-diffusion has been measured for an organic glass for the first time. The
flattening of 1000 nm surface gratings of liquid indomethacin occurs by viscous flow at 12 K …

We report the origin of the effect of nanoscale confinement on the local viscosity of
entangled polystyrene (PS) films at temperatures far above the glass transition temperature …

The addition of nanoparticles (NPs) to polymers is a powerful method to improve the
mechanical and other properties of macromolecular materials. Such hybrid polymer–particle …

The behavior of polymers confined in ultrathin films (thickness< 200 nm) can sensitively
differ from that observed in macroscopic samples. Based on the simple arguments of finite …

Understanding why the glass transition temperature (T g) of polymers deviates substantially
from the bulk with nanoscale confinement has been a 20-year mystery. Ever since the …

X-ray photon correlation spectroscopy (XPCS) has emerged as a powerful technique for
investigating slow, nanometer-scale structural dynamics in materials. This paper reviews …

The reduction in glass transition temperature (Tg) in ultrathin polymer films is commonly
explained in terms of the presence of free surfaces (interface with a gas or vacuum), which …

We review recent efforts and discuss future prospects in research employing X-ray photon
correlation spectroscopy (XPCS) to interrogate the nanometer-scale structural dynamics of …