Thermal resistance effect on anomalous diffusion of molecules under confinement

Significance Diffusion is the primary process in practical multidisciplinary areas such as separation and catalysis. Transportation usually positively correlated with temperature due to thermal motion. We show here an anomalous phenomenon wherein a higher effectively slows diffusion for linear-chain hydrocarbon molecules under confinement. Such obstruction results from novel mechanism of “thermal resistance effect,” which configuration guest molecule significantly deformed effect then strongly restrains transportation nanoscale channels at high temperature. This work will enrich our understanding could shed light on fundamental process.