Nano-textured surfaces using hybrid micro- and nano-materials for efficient water cooling

•Water cooling heat transfer was enhanced by texturing the heated surface with various micro- and nano-materials.•The increased surface area enhanced convection and turbulent mixing.•A substrate was textured with electroplated copper oxide, sprayed silver nanowire or sprayed copper micro-particles.•The texturing methods are appropriate for electronics cooling applications because of their simplicity and scalability.