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Doping of single-walled carbon nanotubes controlled via chemical transformation of encapsulated nickelocene

Authors/others:Kharlamova, Marianna V.Sauer, MarkusSaito, Takeshi (National Institute of Advanced Industrial Science and Technology (AIST)) Sato, Yuta (Natl Inst Adv Ind Sci & Technol, National Institute of Advanced Industrial Science & Technology (AIST), Nanotube Res Ctr) Suenaga, Kazu (National Institute of Advanced Industrial Science and Technology (AIST)) Pichler, ThomasShiozawa, Hidetsugu
Abstract:Controlled doping of carbon nanotubes is elemental for their electronic applications. Here we report an approach to tune the polarity and degree of doping of single-walled carbon nanotubes via filling with nickelocene followed by encapsulated reactions. Using Raman, photoemission spectroscopy and transmission electron microscopy, we show that nickelocene molecules transform into nickel carbides, nickel and inner carbon nanotubes with reaction temperatures as low as 250 °C. The doping efficiency is determined for each chemical component. Synchronous charge transfer among the molecular components allows bipolar doping of the carbon nanotubes to be achieved in a broad range of ±0.0012 e− per carbon.
Date of publication:1.2015
Journal title:Nanoscale
Digital Object Identifier (DOI):http://dx.doi.org/10.1039/C4NR05586A
Publication Type:Article
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