Quasi free-standing one-dimensional nanocrystals of PbTe grown in 1.4 nm SWNTs
https://doi.org/10.17586/2220-8054-2015-6-6-850-856
Abstract
Here, we show successful filling of 1.4 nm single-walled carbon nanotubes (SWNT) with PbTe nanocrystals. The structure of one-dimensional PbTe in SWNT was determined using high-resolution transmission electron microscopy (HRTEM). The electronic structure of composites was studied by optical absorbance and Raman spectroscopies indicating no noticeable interaction of encapsulated PbTe with SWNT wall. Experimental data are supported by ab-initio calculations, showing non-zero density of states at the Fermi level of PbTe@SWNT(10,10) provided by both SWNT and PbTe states and thus metallic conductivity of the composite.
Keywords
Encapsulated SWNT,
SWCNT,
quasi free-standing nanocrystals,
PbTe@SWCNT,
doping,
electronic properties,
HRTEM,
HAADF STEM
Supporting agencies: SWNTs were synthesized at the Institute of Problems of Chemical Physics, RAS, Chernogolovka, Russia by A. V. Krestinin. The VASP program package calculations were performed using the SKIF MSU ‘Chebyshev’ and ‘Lomonosov’ supercomputers. This work was supported by Russian Science Foundation (Grant No. 14-13-00747).
About the Authors
A. V. Lukashin
Department of Materials Science, Moscow State University ; Department of Chemistry, Moscow State University
Russian Federation
Russian Federation
119992, Moscow
N. S. Falaleev
Department of Materials Science, Moscow State University
Russian Federation
Russian Federation
119992, Moscow
N. I. Verbitskiy
Department of Materials Science, Moscow State University ; Department of Chemistry, Moscow State UniversityFaculty of Physics, University of Vienna
Russian Federation
Russian Federation
119992, Moscow
A-1090 Vienna, Austria
A. A. Volykhov
Department of Chemistry, Moscow State University
Russian Federation
Russian Federation
119992, Moscow
I. I. Verbitskiy
Department of Chemistry, Moscow State University
Russian Federation
Russian Federation
119992, Moscow
L. V. Yashna
Department of Chemistry, Moscow State University
Russian Federation
Russian Federation
119992, Moscow
A. S. Kumskov
Shubnikov Institute of Crystallography RAS
Russian Federation
Russian Federation
119333, Moscow
N. A. Kiselev
Shubnikov Institute of Crystallography RAS
Russian Federation
Russian Federation
119333, Moscow
A. A. Eliseev
Department of Materials Science, Moscow State University ; Department of Chemistry, Moscow State University
Russian Federation
Russian Federation
119992, Moscow
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Review
For citations:
Lukashin A.V., Falaleev N.S., Verbitskiy N.I., Volykhov A.A., Verbitskiy I.I., Yashna L.V., Kumskov A.S., Kiselev N.A., Eliseev A.A. Quasi free-standing one-dimensional nanocrystals of PbTe grown in 1.4 nm SWNTs. Nanosystems: Physics, Chemistry, Mathematics. 2015;6(6):850-856. https://doi.org/10.17586/2220-8054-2015-6-6-850-856
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