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Air‐tolerant Fabrication and Enhanced Thermoelectric Performance of n‐Type Single‐walled Carbon Nanotubes Encapsulating 1,1′‐Bis(diphenylphosphino)ferrocene
Author(s) -
oguchi Yoshiyuki,
Iihara Yu,
Ohashi Kenji,
Murayama Tomoko,
Kawai Tsuyoshi
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600810
Subject(s) - carbon nanotube , materials science , ferrocene , raman spectroscopy , thermoelectric effect , fabrication , dopant , nanotechnology , phosphine , doping , thermoelectric materials , chemical engineering , optoelectronics , electrochemistry , composite material , chemistry , organic chemistry , thermal conductivity , electrode , optics , catalysis , alternative medicine , pathology , engineering , thermodynamics , medicine , physics
The thermally‐triggered n‐type doping of single‐walled carbon nanotubes is demonstrated using 1,1′‐bis(diphenylphosphino)ferrocene, a novel n‐type dopant. Through a simple thermal vacuum process, the phosphine compounds are moderately encapsulated inside single‐walled carbon nanotubes. The encapsulation into SWNTs is carefully characterized using Raman/X‐ray spectroscopy and transmission electron microscopy. This easy‐to‐handle doping with air‐stable precursors for n‐type SWNTs enables the large‐scale fabrication of thermoelectric materials showing an excellent power factor exceeding approximately 240 μW mK −2 .