The invention relates to a heat exchanger and a method of transferring heat. The heat exchanger comprises a heat transfer interface including a member configured to contact a heat source, wherein the heat transfer interface includes a plurality of deformable heat conducting structures distributed on the surface of the member to be exposed to a flow of heat exchange medium, wherein the structures emerge from said surface and are configured to deform as a function of a local temperature change of the member through thermal contact with the heat source, wherein the structures are adapted to deform differently as a function of said local temperature change depending on its position on the member in the flow direction.