Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 250, Issue 12, Pages 2599-2604Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201300124
Keywords
electron doping; ferrocene; single-walled carbon nanotubes; X-ray absorption spectroscopy; X-ray photoemission spectroscopy
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Funding
- Austrian Science Fund [FWF P21333-N20]
- European Community [226716]
- Grants-in-Aid for Scientific Research [25600046] Funding Source: KAKEN
- Austrian Science Fund (FWF) [P21333] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 21333] Funding Source: researchfish
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Although the possibility of using metallocenes acting as n-type dopants for metallicity mixed and separated single-walled carbon nanotubes (SWCNT) has been proven, the question of usability for real-life applications still needs to be addressed. The most important factor for their applicability is the stability of the doping outside a vacuum environment. To clarify this issue we have conducted a long-term study on purely metallic SWCNTs after being filled with ferrocene and compared it to results after prolonged exposure to air, demonstrating a decomposition of about half of the filling material leaving a lower but stable doping state. The successful conversion to double-walled carbon nanotubes by high-temperature annealing yielding p-type doped hybrid structures is evidenced additionally. These results let us conclude that SWCNTs filled with metallocenes are an ideal n, or p-type doped starting material for applied electronics based on graphitic structures. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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