1. Computer, Electrical, and Mathematical Sciences and EngineeringKing Abdullah University of Science and Technology Thuwal 23955–6900 Kingdom of Saudi Arabia
2. Materials Science and EngineeringPhysical Science and Engineering DivisionKing Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Kingdom of Saudi Arabia
3. Department of Materials ScienceFudan University Shanghai 200433 P. R. China