scholarly journals Nanotube Chirality

2020 ◽  
Author(s):  
Keyword(s):  
Nanotube Chirality

Parametric Study of Nanostructure Variations on the Macroscopic Thermal and Electrical Behavior of Neat CNT Thin Film Networks

2011 ◽  
Author(s):  
Nikhil A. Ashtekar ◽  
David A. Jack
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Conductivity ◽  
Sensitivity Analysis ◽  
Carbon Nanotube ◽  
Probability Distribution ◽  
Electrical Response ◽  
Electrical Behavior ◽  
Commercial Applications ◽  
Nanotube Chirality

Carbon nanotube thin films are considered by many researchers as a material for the future in many electrical and thermal applications, but a lack of systematic physics-based modeling approaches to quantify the bulk thermal and electrical response due to nanostructure variations makes employing these thin films difficult for commercial applications. In this work we employ the previously presented 3D physics-based computational model for characterizing the bulk thermal and electrical response of a neat carbon nanotube thin film network involving stochastic distributions of length, diameter, chirality, orientation and values of intercontact resistivity obtained from the literature. The model is employed to test the sensitivity of bulk thermal and electrical conductivity on stochastic variations in the nanostructure parameters. We examine the sensitivity of the thin film networks to the experimentally obtained Weibull probability distribution for length and diameter. Additionally, we present a study to quantify the macroscopic conductivity dependence on the nanotube chirality ratio. Through these studies we present an approach that is very generic and can be used for the sensitivity analysis due to variations within the nanostructure.

The effect of carbon nanotube chirality on the electrical conductivity of polymer nanocomposites considering tunneling resistance

2019 ◽  
Vol 30 (46) ◽  
pp. 465701 ◽  
Author(s):  
Jaehyeok Doh ◽  
Sang-In Park ◽  
Qing Yang ◽  
Nagarajan Raghavan
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Polymer Nanocomposites ◽  
Nanotube Chirality ◽  
Tunneling Resistance

Carbon Nanotube Chirality Determines Efficiency of Electron Transfer to Fullerene in All-Carbon Photovoltaics

2013 ◽  
Vol 4 (17) ◽  
pp. 2914-2918 ◽  
Author(s):  
Christine M. Isborn ◽  
Chun Tang ◽  
Ashlie Martini ◽  
Erin R. Johnson ◽  
Alberto Otero-de-la-Roza ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Carbon Nanotube ◽  
Nanotube Chirality

Pull-in Voltage Analysis of Carbon Nanotube Based Electrostatic Actuators by Using the ANSYS Software

2013 ◽  
Vol 818 ◽  
pp. 117-123
Author(s):  
P.A. Gowri Sankar ◽  
K. Udhayakumar
Keyword(s):  
Carbon Nanotube ◽  
Cantilever Beam ◽  
Analysis Method ◽  
Electrostatic Actuator ◽  
Ansys Software ◽  
Element Analysis ◽  
Electrostatic Actuators ◽  
Single Walled Carbon Nanotube ◽  
Finite Element Analysis Method ◽  
Nanotube Chirality

This Paper presents the design and simulation of single walled carbon nanotube (SWCNT) based cantilever type electrostatic actuator using finite element analysis method (FEM). The pull-in voltage has been calculated for various chirality of the nanotube based cantilever beam actuators. The pull-in voltage are obtained for the various gap between electrode and ground of the cantilever beam through extensive simulations using ANSYS software. The results obtained shows that pull-in voltages varies from 2.5 to 13.5V with respect to nanotube chirality and gap length.

Evidence of Conjugation Enhancement in P3HT/SWNT Mixtures for Organic Photovoltaics

2011 ◽  
Vol 1286 ◽  
Author(s):  
Marco Bernardi ◽  
Michele Giulianini ◽  
Nunzio Motta ◽  
Jeffrey C. Grossman
Keyword(s):  
Carbon Nanotubes ◽  
Optical Absorption ◽  
Bulk Heterojunction ◽  
Md Simulations ◽  
Cylindrical Shape ◽  
Heterojunction Solar Cells ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Nanotube Chirality

ABSTRACTClassical molecular dynamics (MD) simulations in conjunction with optical absorption and AFM/nano-Raman experiments are employed to relate the molecular-scale arrangement and conjugation of poly-3-hexylthiophene (P3HT) adsorbed onto single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MWNTs). Taken together our results demonstrate the templating role of carbon nanotubes in increasing the π-conjugation length of the P3HT at the P3HT/carbon nanotube interface. The MD simulations show that SWNTs and MWNTs, due to their inherent 1-dimensional (1D) cylindrical shape and π-conjugation, planarize the P3HT molecules adsorbed at their surface and thus quench their torsional disorder, regardless of the P3HT conformation and nanotube chirality. This effect is more significant for higher SWNT weight fractions in the sample (since it is an interface effect). We investigated this effect experimentally by acquiring nano-Raman spectra in regions of high-MWNT/low-P3HT content in addition to optical absorption spectra of P3HT-SWNT composites with different SWNT concentrations . The increase in the P3HT conjugation is confirmed by a shift of a P3HT feature in the Raman spectrum when going from P3HT-rich to SWNT-rich areas in the mixture. The significance of this work for charge transfer at the P3HT-SWNT interface in bulk-heterojunction solar cells is discussed.

scholarly journals Carbon nanotube chirality enrichment through chirality-selective precipitation

2016 ◽  
Vol 253 (12) ◽  
pp. 2380-2384 ◽  
Author(s):  
Antonio Setaro ◽  
Pascal Bluemmel ◽  
Marcus Ulf Witt ◽  
Rohit Narula ◽  
Stephanie Reich
Keyword(s):  
Carbon Nanotube ◽  
Selective Precipitation ◽  
Nanotube Chirality

scholarly journals Analyzing nanotube chirality

2007 ◽  
Vol 10 (12) ◽  
pp. 69
Keyword(s):  
Nanotube Chirality

scholarly journals Atomic Structure and Energy Distribution of Collapsed Carbon Nanotubes of Different Chiralities

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Julia A. Baimova ◽  
Qin Fan ◽  
Liangcai Zeng ◽  
Zhigang Wang ◽  
Sergey V. Dmitriev ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Distribution Function ◽  
Molecular Dynamics Simulation ◽  
Low Temperature ◽  
Energy Distribution ◽  
Ground State ◽  
Large Diameter ◽  
Dynamics Simulation ◽  
Nanotube Chirality

For carbon nanotubes of sufficiently large diameter at sufficiently low temperature, due to the action of the van der Waals forces, the ground state is a bilayer graphene with closed edges, the so-called collapsed configuration. Molecular dynamics simulation of collapsed carbon nanotubes is performed. The effect of length, diameter, and chirality of the nanotubes on their properties is investigated. It is shown that collapsed nanotubes after relaxation have rippled structure which is strongly dependent on the nanotube chirality. The structural properties are studied by calculating the radial distribution function and energy distribution along various regions in the collapsed carbon nanotubes.

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