Special Issue "Electrical, Thermal and Optical Properties of Nanocarbon Materials"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Carbon Materials".

Deadline for manuscript submissions: 31 December 2021.

Special Issue Editor

Dr. Dawid Janas
Website
Guest Editor
Department of Chemistry, Silesian University of Technology, Gliwice, Poland
Interests: materials science; nanotechnology; chemistry

Special Issue Information

Dear Colleagues,

Researchers’ interest in carbon nanostructures has been ignited worldwide since their discovery. Carbon nanotubes, graphene, and other forms of carbon have shown remarkable thermal, electrical, and optical properties. This has given us hope that, thanks to them, we will be able to replace many traditionally used materials at present, the performance of which is often close to their theoretical limits.

It is my pleasure to invite you to this Special Issue of Materials, which aims to discuss recent findings in the area of their electrical, thermal, and optical properties with a special focus on how microstructure and composition affects them. In particular, it would be worthwhile to elaborate on how the modification of these nanocarbon architectures influences the way these materials interact with light and/or transfer electrical/thermal energy. These factors should be considered for both individual nanocarbon macromolecules such as nanotubes/flakes and their networks in the form of fibers/thin films.

Contributions such as communications, regular articles, or reviews are all welcome.

Dr. Dawid Janas
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Nanocarbon materials (fullerenes, carbon nanotubes, and graphene)
  • Structure control during synthesis or sorting
  • Electrical properties
  • Doping
  • Thermal properties
  • Optical properties
  • Quantum dots
  • Photoluminescence
  • Functional materials
  • Macroscopic ensembles (fibers, thin films, and coatings).

Published Papers (5 papers)

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Research

Open AccessFeature PaperArticle
The Effect of the Gaseous Environment on the Electrical Conductivity of Multi-Walled Carbon Nanotube Films over a Wide Temperature Range
Materials 2020, 13(3), 510; https://doi.org/10.3390/ma13030510 - 21 Jan 2020
Abstract
The surrounding gas atmosphere can have a significant influence on the electrical properties of multi-walled carbon nanotube (CNT) ensembles. In this study, we subjected CNT films to various gaseous environments or vacuum to observe how such factors alter the electrical resistance of networks [...] Read more.
The surrounding gas atmosphere can have a significant influence on the electrical properties of multi-walled carbon nanotube (CNT) ensembles. In this study, we subjected CNT films to various gaseous environments or vacuum to observe how such factors alter the electrical resistance of networks at high temperatures. We showed that the removal of adsorbed water and other contaminants from the surface under reduced pressure significantly affects the electrical conductivity of the material. We also demonstrated that exposing the CNT films to the hydrogen atmosphere (as compared to a selection of gases of inert and oxidizing character) at elevated temperatures results in a notable reduction of electrical resistance. We believe that the observed sensitivity of the electrical properties of the CNT films to hydrogen or vacuum at elevated temperatures could be of practical importance. Full article
(This article belongs to the Special Issue Electrical, Thermal and Optical Properties of Nanocarbon Materials)
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Open AccessCommunication
Spun Carbon Nanotube Fibres and Films as an Alternative to Printed Electronic Components
Materials 2020, 13(2), 431; https://doi.org/10.3390/ma13020431 - 16 Jan 2020
Abstract
Current studies of carbon nanotubes have enabled both new electronic applications and improvements to the performance of existing ones. Manufacturing of macroscopic electronic components with this material generally involves the use of printed electronic methods, which must use carbon nanotube (CNT) powders. However, [...] Read more.
Current studies of carbon nanotubes have enabled both new electronic applications and improvements to the performance of existing ones. Manufacturing of macroscopic electronic components with this material generally involves the use of printed electronic methods, which must use carbon nanotube (CNT) powders. However, in recent years, it has been shown that the use of ready-made self-standing macroscopic CNT assemblies could have considerable potential in the future development of electronic components. Two examples of these are spun carbon nanotube fibers and CNT films. The following paper considers whether these spun materials may replace printed electronic CNT elements in all applications. To enable the investigation of this question some practical experiments were undertaken. They included the formation of smart textile elements, flexible and transparent components, and structural electronic devices. By taking this approach it has been possible to show that CNT fibres and films are highly versatile materials that may improve the electrical and mechanical performance of many currently produced printed electronic elements. Additionally, the use of these spun materials may enable many new applications and functionalities particularly in the area of e-textiles. However, as with every new technology, it has its limitations, and these are also considered. Full article
(This article belongs to the Special Issue Electrical, Thermal and Optical Properties of Nanocarbon Materials)
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Open AccessArticle
Impact of Synthesis Parameters of Multi-Walled Carbon Nanotubes on their Thermoelectric Properties
Materials 2019, 12(21), 3567; https://doi.org/10.3390/ma12213567 - 30 Oct 2019
Cited by 1
Abstract
Carbon nanotubes have been intensively researched for many years because of a wide array of promising properties that they have. In this paper, we present the impact of synthesis parameters on thermoelectric properties of nanocarbon material. We conducted a number of syntheses of [...] Read more.
Carbon nanotubes have been intensively researched for many years because of a wide array of promising properties that they have. In this paper, we present the impact of synthesis parameters on thermoelectric properties of nanocarbon material. We conducted a number of syntheses of multi-walled carbon nanotubes (MWCNTs) at different temperatures (800 and 900 °C) using various amounts of catalyst (2%, 5.5%, and 9.6%) to facilitate the process. We also tested the influence of injection rate of precursor and the necessity of material purification on thermoelectric properties of MWCNTs. The electrical conductivity, thermal conductivity, and Seebeck coefficient were measurement for all samples. Based on these parameters, the values of Power Factor and Figure of Merit were calculated. The results show that the most important parameter in the context of thermoelectric properties is purity of employed MWCNTs. To obtain appropriate material for this purpose optimum synthesis temperature and appropriate content of the catalyst must be selected. The study also reveals that post-synthetic purification of nanocarbon is essential to produce an attractive material for thermoelectrics. Full article
(This article belongs to the Special Issue Electrical, Thermal and Optical Properties of Nanocarbon Materials)
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Open AccessArticle
A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors
Materials 2019, 12(12), 2013; https://doi.org/10.3390/ma12122013 - 23 Jun 2019
Cited by 1
Abstract
Carbon nanotubes (CNTs) are one of the most promising materials in sensing applications due to their electrical and mechanical properties. This paper presents a comparative study between CNT Buckypaper (BP) and aligned CNT-based strain sensors. The Buckypapers were produced by vacuum filtration of [...] Read more.
Carbon nanotubes (CNTs) are one of the most promising materials in sensing applications due to their electrical and mechanical properties. This paper presents a comparative study between CNT Buckypaper (BP) and aligned CNT-based strain sensors. The Buckypapers were produced by vacuum filtration of commercial CNTs dispersed in two different solvents, N,N-Dimethylformamide (DMF) and ethanol, forming freestanding sheets, which were cut in 10 × 10 mm squares and transferred to polyimide (PI) films. The morphology of the BP was characterized by scanning electron microscopy (SEM). The initial electrical resistivity of the samples was measured, and then relative electrical resistance versus strain measurements were obtained. The results were compared with the knocked-down vertically aligned CNT/PI based sensors previously reported. Although both types of sensors were sensitive to strain, the aligned CNT/PI samples had better mechanical performance and the advantage of inferring strain direction due to their electrical resistivity anisotropic behavior. Full article
(This article belongs to the Special Issue Electrical, Thermal and Optical Properties of Nanocarbon Materials)
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Open AccessArticle
Improved Performance of Graphene in Heat Dissipation when Combined with an Orientated Magnetic Carbon Fiber Skeleton under Low-Temperature Thermal Annealing
Materials 2019, 12(6), 954; https://doi.org/10.3390/ma12060954 - 22 Mar 2019
Abstract
The high thermal conductivity and stability, outstanding mechanical properties, and low weight make graphene suitable for many applications in the realm of thermal management, especially in high integration systems. Herein, we report a high-performance, low-temperature reduced graphene oxide/magnetic carbon fiber composite film. Magnetic [...] Read more.
The high thermal conductivity and stability, outstanding mechanical properties, and low weight make graphene suitable for many applications in the realm of thermal management, especially in high integration systems. Herein, we report a high-performance, low-temperature reduced graphene oxide/magnetic carbon fiber composite film. Magnetic carbon fibers were prepared using a co-precipitation method, and the graphene oxide solution was prepared using an improved Hummers’ method. The magnetic carbon fibers were orientated by magnetite and immersed in the graphene oxide solution during filtration, followed by annealing at 800 °C. The composite film exhibited improved thermal conductivity (over 600 W/m·K) and mechanical properties (tensile strength of 37.1 MPa and bending cycle of up to 8000). The experimental results illustrate that the graphene in the composite membrane provides heat transfer channels to promote in-plane thermal conductivity, while the magnetic carbon fiber acts as a scaffold to reinforce the mechanical properties and improve the quality of the graphene. Due to the synergistic effect of the graphene and magnetic carbon, this composite has wide potential applications in heat dissipation. Full article
(This article belongs to the Special Issue Electrical, Thermal and Optical Properties of Nanocarbon Materials)
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