TY - JOUR
T1 - Effects of inclusion dimensions and p-type doping in the terahertz spectra of composite materials containing bundles of single-wall carbon nanotubes
AU - Shuba, Mikhail V.
AU - Paddubskaya, Alesia G.
AU - Kuzhir, Polina P.
AU - Slepyan, Gregory Ya
AU - Seliuta, Dalius
AU - Kašalynas, Irmantas
AU - Valušis, Gintaras
AU - Lakhtakia, Akhlesh
N1 - Funding Information:
We are grateful to Rimvydas Venckevicius and Natalya P. Vileishikova for their kind assistance for Fourier spectroscopy, Lyudmila V. Baran for recording AFM images, and Gediminas Niaura for performing Raman measurements. This research was partially supported by the BRFFR under Projects No. F10R-002 and No. F10CO-020; EU FP7 under Projects FP7-318617 FAEM-CAR, FP7-247007 CACOMEL, and FP7-266529 BY-NanoERA; grant No. MIP-097/2011 from the Research Council of Lithuania; and the Binder Endowment at Penn State. MVS and GYaS carried out theoretical work. AGP, PPK, and MVS made the SWNT samples on which experiments were conducted by AGP, DS, IK, and GV. AL analyzed the match between the theoretical and experimental results. The manuscript was written chiefly by MVS, GYaS, and AL.
PY - 2012
Y1 - 2012
N2 - Experiments recently showed that the finite lengths of single-wall carbon nanotubes (SWNTs) randomly dispersed and randomly aligned in a composite material are responsible for the appearance of a broad peak in its terahertz conductivity. We investigated, both theoretically and experimentally, the influences of the cross-sectional diameter and the acid-induced p-type doping of SWNT bundles in composite materials on their terahertz conductivity peaks (TCPs). We found that the TCP blue-shifts if the inclusion diameter is larger, and that doping enhances the effective conductivity of the composite material. But, a theoretical prediction of the blue-shifting of the TCP by p-type doping was only weakly supported by experimental evidence. All experimental observations turned out to be in good qualitative agreement with the concept of localized plasmon resonance in SWNTs.
AB - Experiments recently showed that the finite lengths of single-wall carbon nanotubes (SWNTs) randomly dispersed and randomly aligned in a composite material are responsible for the appearance of a broad peak in its terahertz conductivity. We investigated, both theoretically and experimentally, the influences of the cross-sectional diameter and the acid-induced p-type doping of SWNT bundles in composite materials on their terahertz conductivity peaks (TCPs). We found that the TCP blue-shifts if the inclusion diameter is larger, and that doping enhances the effective conductivity of the composite material. But, a theoretical prediction of the blue-shifting of the TCP by p-type doping was only weakly supported by experimental evidence. All experimental observations turned out to be in good qualitative agreement with the concept of localized plasmon resonance in SWNTs.
KW - carbon nanotubes
KW - localized plasmon resonance
KW - terahertz
UR - http://www.scopus.com/inward/record.url?scp=84875874056&partnerID=8YFLogxK
U2 - 10.1117/1.JNP.6.061707
DO - 10.1117/1.JNP.6.061707
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AN - SCOPUS:84875874056
SN - 1934-2608
VL - 6
JO - Journal of Nanophotonics
JF - Journal of Nanophotonics
IS - 1
M1 - 061707
ER -