"NANO-WELDING: E-beam welding eyed for dense nanoscale circuits
An international consortium of researchers believes its electron-beam method for joining nanotubes could be applied to the construction of ultradense circuits. Rather than add a "glue" material between nanotubes, the electron beam knocks out atoms from between touching nanotubes. The tubes heal the defect by sharing an atom and thereby create a weld between them.

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Story in EE Times: http://eet.com/at/news/OEG20020930S0061