Electrical Conductivity of Multiwall Carbon Nanotube Bundles Contacting with Metal Electrodes by Nano Manipulators inside SEM
| Autor: | Lining Sun, Aristide Djoulde, Yi-Ni Lin, Tao Chen, Song-Chao Geng, Maosheng Ye, Xuan Li, Li Ma, Quan Yang, Dongxing Zhang, Shungen Xiao |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
metallicity
Materials science Scanning electron microscope General Chemical Engineering Electrical breakdown chemistry.chemical_element 02 engineering and technology Carbon nanotube 01 natural sciences Article law.invention Electrical resistivity and conductivity law 0103 physical sciences General Materials Science Composite material carbon nanotube 010306 general physics QD1-999 density functional theory Charge density 021001 nanoscience & nanotechnology molecular dynamics semiconductivity Chemistry chemistry Bundle Density functional theory 0210 nano-technology Carbon |
| Zdroj: | Nanomaterials Volume 11 Issue 5 Nanomaterials, Vol 11, Iss 1290, p 1290 (2021) |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano11051290 |
| Popis: | Determining the metallicity and semiconductivity of a multi-walled carbon nanotube (MWCNT) bundle plays a particularly vital role in its interconnection with the metal electrode of an integrated circuit. In this paper, an effective method is proposed to determine the electrical transport properties of an MWCNT bundle using a current–voltage characteristic curve during its electrical breakdown. We established the reliable electrical nanoscale contact between the MWCNT bundle and metal electrode using a robotic manipulation system under scanning electron microscope (SEM) vacuum conditions. The experimental results show that the current–voltage curve appears as saw-tooth-like current changes including up and down steps, which signify the conductance and breakdown of carbon shells in the MWCNT bundle, respectively. Additionally, the power law nonlinear behavior of the current–voltage curve indicates that the MWCNT bundle is semiconducting. The molecular dynamics simulation explains that the electron transport between the inner carbon shells, between the outermost carbon shells and gold metal electrode and between the outermost carbons shells of two adjacent individual three-walled carbon nanotubes (TWCNTs) is through their radial deformation. Density functional theory (DFT) calculations elucidate the electron transport mechanism between the gold surface and double-wall carbon nanotube (DWCNT) and between the inner and outermost carbon shells of DWCNT using the charge density difference, electrostatic potential and partial density of states. |
| Databáze: | OpenAIRE |
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