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Fabrication and Application of Carbon Nanotube Films and Fibers

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (20 June 2024) | Viewed by 1034

Special Issue Editor


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Guest Editor
Department of Electronics and Nanoengineering, Aalto University, Espoo, Finland
Interests: carbon nanomaterials; 2D materials; chemical vapor deposition; transparent conducting film; optoelectronics

Special Issue Information

Dear Colleagues,

Carbon nanotubes (CNTs), as one of the allotropes of carbon, have been investigated by researchers for decades due to their outstanding optical, electrical, chemical, and mechanical properties. In addition to these properties, CNTs are environmentally stable. CNTs have been incorporated into thin films and fibers for specific applications due to their excellent optoelectronic and mechanical properties, respectively. Thus, CNT films and fibers are drawing increased attention both from academic and industrial fields.

The Special Issue aims to collect the latest advances in the fabrication and application of CNT films and fibers. It will cover various topics, including, but not limited to, dry and wet deposition of thin films, dry and wet spinning of fibers, and applications ranging from optoelectronics to mechanics, e.g., photodetectors, photovoltaics, gas sensors, conductive fibers, mechanical applications that present the tensile strength of fibers, and composites consisting of CNT films or fibers. Topics such as mechanism investigation, advanced characterization techniques, and flexible/stretchable/wearable devices are especially welcome.

Dr. Erxiong Ding
Guest Editor

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Keywords

  • carbon nanotubes
  • thin films
  • fibers
  • optoelectronics
  • sensors
  • tensile strength

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Published Papers (1 paper)

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Research

10 pages, 2206 KiB  
Article
Measuring the Electronic Bandgap of Carbon Nanotube Networks in Non-Ideal p-n Diodes
by Gideon Oyibo, Thomas Barrett, Sharadh Jois, Jeffrey L. Blackburn and Ji Ung Lee
Materials 2024, 17(15), 3676; https://doi.org/10.3390/ma17153676 - 25 Jul 2024
Viewed by 418
Abstract
The measurement of the electronic bandgap and exciton binding energy in quasi-one-dimensional materials such as carbon nanotubes is challenging due to many-body effects and strong electron–electron interactions. Unlike bulk semiconductors, where the electronic bandgap is well known, the optical resonance in low-dimensional semiconductors [...] Read more.
The measurement of the electronic bandgap and exciton binding energy in quasi-one-dimensional materials such as carbon nanotubes is challenging due to many-body effects and strong electron–electron interactions. Unlike bulk semiconductors, where the electronic bandgap is well known, the optical resonance in low-dimensional semiconductors is dominated by excitons, making their electronic bandgap more difficult to measure. In this work, we measure the electronic bandgap of networks of polymer-wrapped semiconducting single-walled carbon nanotubes (s-SWCNTs) using non-ideal p-n diodes. We show that our s-SWCNT networks have a short minority carrier lifetime due to the presence of interface trap states, making the diodes non-ideal. We use the generation and recombination leakage currents from these non-ideal diodes to measure the electronic bandgap and excitonic levels of different polymer-wrapped s-SWCNTs with varying diameters: arc discharge (~1.55 nm), (7,5) (0.83 nm), and (6,5) (0.76 nm). Our values are consistent with theoretical predictions, providing insight into the fundamental properties of networks of s-SWCNTs. The techniques outlined here demonstrate a robust strategy that can be applied to measuring the electronic bandgaps and exciton binding energies of a broad variety of nanoscale and quantum-confined semiconductors, including the most modern nanoscale transistors that rely on nanowire geometries. Full article
(This article belongs to the Special Issue Fabrication and Application of Carbon Nanotube Films and Fibers)
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