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Nov_14_Radocea_Tailoring Atomic Structure of GNRs

Nov_14_Radocea_Tailoring Atomic Structure of GNRs - Tailo...

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Tailoring the Atomic Structure of Graphene Nanoribbons by Scanning Tunneling Micros cope Lithography 1 Authors: Levente Tapaszto, Gergely Dobrik,  Phillipe Lambin, Laszlo P Biro MatSe461 Adrian Radocea Nov 14 th , 2011 1 1.Tapaszto,  L.  et  al.  (2008).  Tailoring  the  atomic  structure  of  graphene  nanoribbons  by  scanning  tunneling  microscopy  lithography.  Nature Nanotechnology , 3, 397-401
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Abstract The practical realization of nanoscale electronics faces two major challenges: the precise engineering of the building blocks and  their  assembly  into  functional  circuits1.  In  spite  of  the  exceptional  electronic  properties  of  carbon  nanotubes2,  only  basic  demonstration  devices  have  been  realized  that  require  time-consuming  processes3–5.  This  is  mainly  due  to  a  lack  of  selective  growth  and  reliable  assembly  processes  for  nanotubes.  However,  graphene  offers  an  attractive  alternative.  Here  we  report  the  patterning  of  graphene  nanoribbons  and  bent  junctions  with  nanometre-precision,  well-defined  widths  and  predetermined  crystallographic  orientations,  allowing  us  to  fully  engineer  their  electronic  structure  using  scanning  tunnelling  microscope  lithography.  The  atomic  structure  and  electronic  properties  of  the  ribbons  have  been  investigated  by  scanning  tunnelling  microscopy and tunnelling spectroscopy measurements. Opening of confinement gaps up to 0.5 eV, enabling room-temperature 
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