1. Department of Materials Science and Engineering, North Carolina State University 1 , Raleigh, North Carolina 27695-7919, USA
2. Adroit Materials, Inc 2 ., 2054 Kildaire Farm Rd., Cary, North Carolina 27518, USA
3. HexaTech, Inc. 3 , 991 Aviation Pkwy Ste 800, Morrisville, North Carolina 27560, USA