Hard and soft matter can be distinguished by the energy of chemical bonds in comparison with kBT. At the interface of hard and soft matter, there exists a region of transition between strong (covalent/ionic/metallic) bonds in solids and weak (van der Waals/hydrogen/electrostatic) interactions in liquids and polymers. Transport of energy and mass at such interfaces is yet to be fully explored, but seems both rich in science and of technological importance. This paper discusses some fundamental issues as well as some technological implications.