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Optical properties of single‐walled carbon nanotubes filled with CuCl by gas‐phase technique
Author(s) -
Fedotov Pavel V.,
Tonkikh Alexander A.,
Obraztsova Ekaterina A.,
Nasibulin Albert G.,
Kauppinen Esko I.,
Chuvilin Andrey L.,
Obraztsova Elena D.
Publication year - 2014
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201451240
Subject(s) - carbon nanotube , materials science , surface modification , optical properties of carbon nanotubes , doping , nanotechnology , high resolution transmission electron microscopy , absorption (acoustics) , selective chemistry of single walled nanotubes , crystal (programming language) , phase (matter) , nanotube , mechanical properties of carbon nanotubes , chemical engineering , composite material , transmission electron microscopy , optoelectronics , chemistry , organic chemistry , computer science , engineering , programming language
Single‐walled carbon nanotubes (SWCNTs) have unique electronic and optical properties, which are attractive in various applications. These properties can be further improved by functionalization. In this work, it is shown that filling nanotubes with CuCl leads to improvement of their electro‐conductive and optical transmission properties up to outstanding level. The improvement is due to the significant p‐type doping of the functionalized nanotubes. That leads to a huge increase in nanotubes charge carrier density and the considerable decrease of the nanotubes absorption via Pauli blocking. The functionalization was realized via a gas‐phase filling of SWCNTs with CuCl. We demonstrate the effect of huge doping on optical properties of nanotubes with different average diameters. The observed sufficient stability of the CuCl@SWCNT composite is proved to be due to the formation of quasi‐one‐dimensional (1D) CuCl crystal inside nanotubes. AC‐HRTEM image of 1D CuCl crystal formed inside SWCNT.