Yoshio Bando

Institute of Molecular Plus, Tianjin University, China
International Center for Materials Nanoarchtectonics (WPI-MANA), National Institute for Materials Science (NIMS), Japan
Australian Institute for Innovative Materials (AIIM), University of Wollongong (UOW) Australia

The highly efficient thermal management is very important for quick heat release in the face of increasing power consumption of electronic devices. BN is highly insulating and wide-bandgap in properties and more stable than graphite in thermology and chemistry. However, their insufficient production rather limited the studies and the full realization of potentials. We have recently developed effective methods for the high-yield syntheses of BN nanotubes and nanosheets. We have synthesized gram-level high-quality BN nanotubes through the carbon free-chemical vapour deposition and gram-level nanosheets by the chemical blowing method, which make them possible to initiate the studies of polymetric composites.  Our BN nanotubes and nanosheets have been filled into polymer matrix to make thermal conductive composites, which were created with 20-times increase of original thermal conductivity. They are useful for heating-release insulting packaging of down-sizing faster cooler electronics. Our synthesis methods are thus extended for producing new graphene materials, e.g. 3D strutted-graphene (SG) via chemical blowing.  The SG consists of continuous graphitic membranes which are homogenously connected and spatially supported by the networks of micrometer-width graphitic struts. The high electrical conductivity, specific surface area, mechanical strength and elasticity are thus simultaneously achieved. In addition, we indeed demonstrate the striking effects of tensile, compressive and bending deformation on the electrical response of BN nanotubes and nanosheets under manipulation and electrical probing in HRTEM using STM/AFM-TEM special holders. The author would like to acknowledge to Professor D.Golberg and others in NIMS.