john simpson

The rise of white graphene

Blog Post created by john simpson on Nov 10, 2010

Taken from Nanowerk
"The rise of white graphene"



Graphene nanoribbons – atomically-thin strips of graphene  that are just a few nanometers wide – are considered to be excellent candidates  for future electronics applications as their properties can be adjusted through  width and edge shape. Along with graphene, boron nitride nanoribbons have  attracted more and more fundamental research interest. For instance, researchers  have found that magnetism could be induced in such ribbons by the replacement of  B or N with Be, B, C, N, O, Al, and Si, or with vacancy defects. They also found  that the ribbons could have a narrowed band gap and improved electrical  conductivity tuned by a transverse electric field or special edge structure.  These findings promise a bright future in in optoelectronics and spintronics for  atomically thin boron nitride nanoribbons... In new work that represents an  important step in bridging theoretical predictions and experimental realization  of atomically thin boron nitride nanoribbons, [Haibo] Zeng and coworkers (from  National Institute for Materials Science (NIMS) in Japan and Nanjing University  of Aeronautics and Astronautics (NUAA) in China) demonstrate the successful  fabrication of 'white graphene' nanoribbons – made of thermally and chemically  stable atomic layers of hexagonal boron nitride (h-BN) – by unwrapping  multiwalled boron nitride nanotubes under delicate argon plasma etching. The  team has reported their findings in the October 28, 2010 online issue of  Nano Letters.