scholarly journals Infrared Study of Charge Carrier Confinement in Doped (6,5) Carbon Nanotubes

2021 ◽  
Vol 125 (10) ◽  
pp. 5700-5707
Author(s):  
Klaus H. Eckstein ◽  
Florian Hirsch ◽  
Richard Martel ◽  
Tobias Hertel
Keyword(s):  
Carbon Nanotubes ◽  
Charge Carrier ◽  
Infrared Study ◽  
Carrier Confinement

On the high charge-carrier mobility in polyaniline molecular channels in nanogaps between carbon nanotubes

2017 ◽  
Vol 51 (4) ◽  
pp. 488-491 ◽  
Author(s):  
A. V. Emelianov ◽  
A. V. Romashkin ◽  
K. A. Tsarik ◽  
A. G. Nasibulin ◽  
V. K. Nevolin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
High Charge ◽  
High Charge Carrier Mobility

Strain-enhanced charge carrier confinement in quantum dots and wires fabricated by cleaved edge overgrowth

2010 ◽  
Author(s):  
J. Ehehalt ◽  
C. Neugirg ◽  
R. Schuster ◽  
D. Schuh ◽  
W. Wegscheider ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Charge Carrier ◽  
Carrier Confinement

Universal crossover of the charge carrier fluctuation mechanism in different polymer/carbon nanotubes composites

2015 ◽  
Vol 107 (14) ◽  
pp. 143106 ◽  
Author(s):  
C. Barone ◽  
G. Landi ◽  
C. Mauro ◽  
H. C. Neitzert ◽  
S. Pagano
Keyword(s):  
Carbon Nanotubes ◽  
Charge Carrier

Low Frequency Noise and Resistivity Characteristics of Hybrid Composites with Onion-Like Carbon and Multi-Walled Carbon Nanotubes

2019 ◽  
Vol 18 (02) ◽  
pp. 1940009 ◽  
Author(s):  
Marina Tretjak ◽  
Sandra Pralgauskaitė ◽  
Jonas Matukas ◽  
Jan Macutkevič ◽  
Jūras Banys ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Charge Carrier ◽  
Hybrid Composites ◽  
Low Frequency ◽  
Frequency Noise ◽  
Noise Spectral Density ◽  
Noise Characteristics ◽  
Conduction Mechanisms ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The comprehensive study of resistivity and low frequency (10[Formula: see text]Hz–20[Formula: see text]kHz) noise characteristics of hybrid polymer composites with multi-walled carbon nanotubes (MWCNTs) and onion-like carbon (OLC) particles in one material have been carried out in the wide temperature range ((75–380) K). The characteristic dependences on the fillers density and the dominant conduction mechanisms were investigated. At low temperature ((75–170) K), the resistivity dependences on temperature are well-fitted by the Mott’s formula for the quasi-one-dimensional charge carrier variable range hopping and Arrhenius law. At temperatures above 300[Formula: see text]K, the resistance increases with temperature due to matrix expansion and decreases due to the onset of the conductivity in the matrix. Low frequency voltage noise spectra comprise of 1/[Formula: see text] and Lorentzian-type components with characteristic times in the range from 0.1[Formula: see text][Formula: see text]s to 10[Formula: see text][Formula: see text]s; the noise spectral density in the region of Ohmic resistance is proportional to the voltage square. Therefore, thermally activated charge carrier capture centers randomly modulate the sample’s resistance and control the carrier hopping. Impulse noise and more sudden changes of the noise characteristics were observed at the temperatures, where the conduction mechanisms change.

scholarly journals Tunable Chemical Grafting of Three-Dimensional Poly (3, 4-ethylenedioxythiophene)/Poly (4-styrenesulfonate)-Multiwalled Carbon Nanotubes Composite with Faster Charge-Carrier Transport for Enhanced Gas Sensing Performance

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2470
Author(s):  
Hyojae Kim ◽  
Yeongseok Jang ◽  
Gyeong Won Lee ◽  
Seung Yun Yang ◽  
Jinmu Jung ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Charge Carrier ◽  
Multiwalled Carbon Nanotubes ◽  
Carrier Transport ◽  
Gas Sensing ◽  
Three Dimensional ◽  
Charge Carrier Transport ◽  
Multiwalled Carbon ◽  
Gas Molecules ◽  
Sensing Performance

The three-dimensional volumetric application of conductive poly (3,4-ethylenedioxythiophene)/poly (4-styrenesulfonate) (PEDOT:PSS) to multiwalled carbon nanotubes (MWCNTs) has not been widely reported. In this study, the applicability of the 3D PEDOT:PSS-MWCNT composite for a gas sensor was investigated with different PEDOT:PSS concentrations. The gas-sensing performance of the 3D PEDOT:PSS-MWCNT composites was investigated using ethanol and carbon monoxide (CO) gas. Overall, in comparison with the pristine MWCNTs, as the PEDOT:PSS concentration increased, the 3D PEDOT:PSS-MWCNT composites exhibited increased conductivity and enhanced gas sensing performances (fast response and recovery times) to both ethanol and CO gases. Importantly, although the PEDOT:PSS coating layer reduced the number of sites for the adsorption and desorption of gas molecules, the charge-carrier transport between the gas molecules and MWCNTs was significantly enhanced. Thus, PEDOT:PSS can be chemically grafted to MWCNTs to enhance the connectivity and conductivity of a 3D network, leading to possible applications in gas sensors.

(Invited) Charge-Carrier Localization in Doped Semiconducting Carbon Nanotubes Revealed By IR- and EPR Spectroscopy

2021 ◽  
Vol MA2021-01 (11) ◽  
pp. 580-580
Author(s):  
Klaus Eckstein ◽  
Michael Auth ◽  
Florian Oberndorfer ◽  
Andreas Sperlich ◽  
Vladimir Dyakonov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Charge Carrier ◽  
Epr Spectroscopy ◽  
Carrier Localization

Strong charge carrier confinement in purely strain induced GaAs∕InAlAs single quantum wires

2004 ◽  
Vol 85 (17) ◽  
pp. 3672-3674 ◽  
Author(s):  
R. Schuster ◽  
H. Hajak ◽  
M. Reinwald ◽  
W. Wegscheider ◽  
D. Schuh ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Quantum Wires ◽  
Single Quantum ◽  
Carrier Confinement

Multilayer polymer electroluminescent devices: Color-variable emission through charge carrier confinement

1997 ◽  
Vol 84 (1-3) ◽  
pp. 557-558 ◽  
Author(s):  
M. Hamaguchi ◽  
A. Fujii ◽  
Y. Ohmori ◽  
K. Yoshino
Keyword(s):  
Charge Carrier ◽  
Electroluminescent Devices ◽  
Carrier Confinement
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