scholarly journals Impact of synthesis temperature on structure of carbon nanotubes and morphological and electrical characterization of their polymeric nanocomposites

2017 ◽  
Author(s):  
Mohammad Arjmand ◽  
Seyyed Alireza Mirkhani ◽  
Petra Pötschke ◽  
Beate Krause ◽  
Uttandaraman Sundararaj
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Characterization ◽  
Synthesis Temperature ◽  
Polymeric Nanocomposites ◽  
Structure Of Carbon Nanotubes

Broadband Electrical Characterization of Multiwalled Carbon Nanotubes and Contacts

Nano Letters ◽  
2007 ◽  
Vol 7 (4) ◽  
pp. 1086-1090 ◽  
Author(s):  
Paul Rice ◽  
T. Mitch Wallis ◽  
Stephen E. Russek ◽  
Pavel Kabos
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Electrical Characterization ◽  
Multiwalled Carbon

Effect of Water on the Electrical Properties of Carbon Nanotubes

2008 ◽  
Vol 8 (12) ◽  
pp. 6523-6527
Author(s):  
D. Mendoza ◽  
P. Santiago
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Deposition ◽  
Electrical Characterization ◽  
Charge Carriers ◽  
Hysteretic Behavior ◽  
Water Molecules ◽  
Humid Environment ◽  
Chemical Deposition Method ◽  
Made In

In this work we present the electrical characterization of carbon nanotubes synthesized by a thermal chemical deposition method, using carbon disulfide as the precursor of carbon and iron as the catalyst. We found a broad maximum in the electrical resistance as a function of temperature between 275–300 K and a hysteretic behavior when the measurements were made in a humid environment. We propose that the water molecules act as traps for charge carriers, and the overall behavior of the observed phenomenon is discussed in terms of the confinement of water inside the carbon nanotubes.

Mechanical and Electrical Characterization of Polymer Nanocomposites with Carbon Nanotubes

2011 ◽  
Vol 3 (6) ◽  
pp. 826-834 ◽  
Author(s):  
S. Bellucci ◽  
L. Coderoni ◽  
F. Micciulla ◽  
G. Rinaldi ◽  
I. Sacco
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
Electrical Characterization

Real-Time Electrical Characterization of Dielectrophoretic Assembly of Multi-Walled Carbon Nanotubes

2007 ◽  
Vol 1057 ◽  
Author(s):  
Libao An ◽  
Craig Friedrich
Keyword(s):  
Carbon Nanotubes ◽  
Real Time ◽  
Electrical Characterization ◽  
Electrode Gap ◽  
Monitoring Method ◽  
Impedance Model ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Simultaneous Variation

ABSTRACTThis paper reports on a real-time monitoring method for the assembly of a small number of metallic carbon nanotubes (CNTs) by dielectrophoresis (DEP). A time-varying impedance model of the electrode gap was developed to evaluate the number of CNTs which span the gap by measuring the simultaneous variation of gap impedance during the DEP process. Sudden decreases of gap impedance signals were detected during the DEP assembly of multi-walled carbon nanotubes (MWNTs) corresponding to assembly of single or multiple tubes across the gap. The method reduces the requirement of scanning electron microscopy (SEM) inspection and could help automate DEP assembly of CNTs.

scholarly journals Electromagnetic, Morphological, and Electrical Characterization of POMA/Carbon Nanotubes-Based Composites

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Simone de Souza Pinto ◽  
Mirabel Cerqueira Rezende
Keyword(s):  
Carbon Nanotubes ◽  
Epoxy Resin ◽  
Network Formation ◽  
Electrical Characterization ◽  
Resin Matrix ◽  
X Band ◽  
Ft Ir ◽  
Electrical Permittivity

This study involves the preparation of conducting composites based on poly(o-methoxyaniline) (POMA) and carbon nanotubes (CNT) and the evaluation of them as radar absorbing materials (RAM), in the frequency range of 8.2–12.4 GHz (X-band). The composites were obtained by synthesis in situ of POMA in the presence of CNT (0.1 and 0.5 wt% in relation to the o-methoxyaniline monomer). The resulting samples—POMA/CNT-0.1 wt% and POMA/CNT-0.5 wt%—were incorporated in an epoxy resin matrix in the proportion of 1 and 10 wt%. FT-IR analyses show that the POMA was successfully synthesized on the CNT surface. SEM analyses show that the synthesized POMA recovered all CNT surface. Electrical conductivity measurements show that the CNT contributed to increase the conductivity of POMA/CNT composites (1.5–6.7 S·cm−1) in relation to the neat POMA (5.4 × 10−1 S·cm−1). The electromagnetic characterization involved the measurements of complex parameters of electrical permittivity (ε) and magnetic permeability (µ), using a waveguide in the X-band. From these experimental data reflection loss (RL) simulations were performed for specimens with different thicknesses. The complex parameters show that the CNT in the composites increased ε and µ. These results are attributed to the CNT network formation into the composites. Simulated RL curves of neat POMA and POMA/CNT in epoxy resin show the preponderant influence of POMA on all RL curves. This behavior is attributed to the efficient CNT recovering by POMA. RL results show that the composite based on 10 wt% of POMA/CNT-0.5 wt% in epoxy resin (9 mm thickness) presents the best RL results (≈87% of attenuation at 12.4 GHz).

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