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Nature Materials 7, 840–841 (1 November 2008) | doi:10.1038/nmat2308

Carbon nanotubes: Doped defects tracked down

Marcus Freitag

Doping of intrinsic materials with electrons or holes is an important step in the fabrication of functional electronic devices. For example, the complementary logic (CMOS) present in most computer chips relies on both electron-conducting (n-type) and hole-conducting (p-type) switches.