Phys. Rev. Lett. 89, 075505 (2002) [4 pages]Molecular Junctions by Joining Single-Walled Carbon NanotubesReceived 30 January 2002; published 29 July 2002 Crossing single-walled carbon nanotubes can be joined by electron beam welding to form molecular junctions. Stable junctions of various geometries are created in situ in a transmission electron microscope. Electron beam exposure at high temperatures induces structural defects which promote the joining of tubes via cross-linking of dangling bonds. The observations are supported by molecular dynamics simulations which show that the creation of vacancies and interstitials induces the formation of junctions involving seven- or eight-membered carbon rings at the surface between the tubes. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.075505
DOI:
10.1103/PhysRevLett.89.075505
PACS:
61.46.+w, 68.37.Lp, 81.07.De
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