Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/61
Title: Graphene analogues of BN: novel synthesis and properties
Authors: Nag, Angshuman
Raidongia, Kalyan
Hembram, Kailash P S S
Datta, Ranjan
Waghmare, Umesh V
Rao, C N R
Keywords: BN
Graphene
Gas adsorption
Phonons
Mechanical stability
Elastic modulus
Boron-Nitride Nanotubes
Inorganic Nanotubes
Functionalization
Nanoparticles
Composites
Route
Issue Date: Mar-2010
Publisher: The American Chemical Society
Citation: ACS Nano 4(3), 1539-1544 (2010)
Abstract: Enthused by the fascinating properties of graphene, we have prepared graphene analogues of BN by a chemical method with a control on the number of layers. The method involves the reaction of boric acid with urea, wherein the relative proportions of the two have been varied over a wide range. Synthesis with a high proportion of urea yields a product with a majority of 1-4 layers. The surface area of BN increases progressively with the decreasing number of layers, and the high surface area BN exhibits high CO, adsorption, but negligible H, adsorption. Few-layer BN has been solubilized by interaction with Lewis bases. We have used first-principles simulations to determine structure, phonon dispersion, and elastic properties of BN with planar honeycomb lattice-based n-layer forms. We find that the mechanical stability of BN with respect to out-of-plane deformation is quite different from that of graphene, as evident in the dispersion of their flexural modes. BN is softer than graphene and exhibits signatures of long-range ionic interactions in its optical phonons. Finally, structures with different stacking sequences of BN have comparable energies, suggesting relative abundance of slip faults, stacking faults, and structural inhomogeneities in multilayer BN.
Description: Restricted access.
URI: http://hdl.handle.net/10572/61
Other Identifiers: 1936-0851
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

Files in This Item:
File Description SizeFormat 
Sl.No.34 ACS.pdf
  Restricted Access
4.34 MBAdobe PDFView/Open Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.