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Nanomaterials
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Carbon-Based Nanocoatings
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Carbon-Based Nanocoatings

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "2D and Carbon Nanomaterials".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 9663

Special Issue Editor

Dr. Jan Macutkevic

E-Mail Website
Guest Editor
Faculty of Physics, Vilnius University, 10222 Vilnius, Lithuania
Interests: synthesis and application of ferroelectrics; nanomaterials and nanocomposites for sensing and coatings; broadband characterization; ferroelectrics for energy storage and renewable energy production
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Currently, nanomaterials and nanotechnologies are innovating many aspects of our daily life. The size reduction of materials gives them unique properties that allow groundbreaking results to be obtained in several application fields. In particular, nanomaterials have provided an important contribution in human life—for example, in chemical or image sensors, electromagnetic coatings and sensors, electronic and transport applications, renewable energy production, and so on. Among nanomaterials, carbon nanocoatings and related nanostructures are important and are extensively studied.

This Special Issue aims to collect manuscripts dealing with the use and properties of carbon-based nanocoatings (e.g., graphene, graphene oxide, MXene) alone or in combination with other nanomaterials (metallic or semiconductor nanoparticles or nanocoatings) or even as a part of polymeric nanocomposites, focused on nanocoatings, thin films, surfaces, and interfaces. Subjects that fall into the scope of this Special Issue include the preparation of carbon-based nanocoatings; functionalization methodologies of carbon nanocoatings; the preparation of carbon-composite-based nanocoatings; electrical and structural characterization; physicochemical interaction with molecules or biomarkers; optical properties of nanocoatings; and nanocoatings for energy storage and renewable energy production.

Manuscripts can be submitted in the following formats: full research papers, communications, and reviews.

Dr. Jan Macutkevic
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 submissions that pass pre-check are 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. Nanomaterials 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 2900 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

  • Graphene
  • Nanocoatings
  • Surface functionalization
  • Nanocomposites
  • Carbon nanostructures
  • Sensing applications
  • Electromagnetic applications

Published Papers (3 papers)

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Research

16 pages, 35010 KiB  
Article
Dielectric Relaxation Spectroscopy and Synergy Effects in Epoxy/MWCNT/Ni@C Composites
by Darya Meisak, Jan Macutkevic, Algirdas Selskis, Polina Kuzhir and Juras Banys
Nanomaterials 2021, 11(2), 555; https://doi.org/10.3390/nano11020555 - 23 Feb 2021
Cited by 7 | Viewed by 2061
Abstract
The dielectric/electric properties of the Ni@C (carbon-coated Ni)/epoxy composites and Ni@C/MWCNTs (multi-walled carbon nanotubes)/epoxy composites loaded with fixed MWCNTs amount just below the percolation threshold (0.09 vol.%) and Ni@C at different concentrations up to 1 vol.% were investigated in broad frequency (20 Hz–40 [...] Read more.
The dielectric/electric properties of the Ni@C (carbon-coated Ni)/epoxy composites and Ni@C/MWCNTs (multi-walled carbon nanotubes)/epoxy composites loaded with fixed MWCNTs amount just below the percolation threshold (0.09 vol.%) and Ni@C at different concentrations up to 1 vol.% were investigated in broad frequency (20 Hz–40 GHz) and temperature (30 K–500 K) regions. In composites with the only Ni@C nanoparticles, the electrical percolation threshold was determined between 10 and 15 vol.%. Above the percolation threshold the dielectric permittivity (ε’) and the electrical conductivity (σ) of the composites loaded with Ni@C only are high enough, i.e., ε’ = 105 and σ = 0.6 S/m at 100 Hz for composites with 30 vol.% Ni@C, to be used for electromagnetic shielding applications. The annealing to 500 K was proved to be an effective and simple tool to decrease the percolation threshold in epoxy/Ni@C composites. For hybrid composites series an optimal concentration of Ni@C (0.2 vol.%) was determined, leading to the conductivity absolute values several orders of magnitude higher than that of a composite filled with MWCNTs only. The synergy effects of using both fillers have been discussed. Below room temperature the electrical transport is mainly governed by epoxy resin compression in all composites, while the electron tunnelling was observed only in hybrid composites below 200 K. At higher temperatures (above 400 K), in addition to the nanoparticles redistribution effects, the electrical conductivity of epoxy resin makes a significant contribution to the total composite conductivity. The dielectric relaxation spectroscopy allows estimating the nanoparticles distributions in polymer matrix and could be used as the non-destructive and fast alternate to microscopy techniques for general polymer composite fabrication control. Full article
(This article belongs to the Special Issue Carbon-Based Nanocoatings)
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12 pages, 13991 KiB  
Article
Outstanding Radiation Tolerance of Supported Graphene: Towards 2D Sensors for the Space Millimeter Radioastronomy
by Alesia Paddubskaya, Konstantin Batrakov, Arkadiy Khrushchinsky, Semen Kuten, Artyom Plyushch, Andrey Stepanov, Gennady Remnev, Valery Shvetsov, Marian Baah, Yuri Svirko and Polina Kuzhir
Nanomaterials 2021, 11(1), 170; https://doi.org/10.3390/nano11010170 - 11 Jan 2021
Cited by 6 | Viewed by 2715
Abstract
We experimentally and theoretically investigated the effects of ionizing radiation on a stack of graphene sheets separated by polymethyl methacrylate (PMMA) slabs. The exceptional absorption ability of such a heterostructure in the THz range makes it promising for use in a graphene-based THz [...] Read more.
We experimentally and theoretically investigated the effects of ionizing radiation on a stack of graphene sheets separated by polymethyl methacrylate (PMMA) slabs. The exceptional absorption ability of such a heterostructure in the THz range makes it promising for use in a graphene-based THz bolometer to be deployed in space. A hydrogen/carbon ion beam was used to simulate the action of protons and secondary ions on the device. We showed that the graphene sheets remain intact after irradiation with an intense 290 keV ion beam at the density of 1.5 × 1012 cm−2. However, the THz absorption ability of the graphene/PMMA multilayer can be substantially suppressed due to heating damage of the topmost PMMA slabs produced by carbon ions. By contrast, protons do not have this negative effect due to their much longer mean free pass in PMMA. Since the particles’ flux at the geostationary orbit is significantly lower than that used in our experiments, we conclude that it cannot cause tangible damage of the graphene/PMMA based THz absorber. Our numerical simulations reveal that, at the geostationary orbit, the damaging of the graphene/PMMA multilayer due to the ions bombardment is sufficiently lower to affect the performance of the graphene/PMMA multilayer, the main working element of the THz bolometer, which remains unchanged for more than ten years. Full article
(This article belongs to the Special Issue Carbon-Based Nanocoatings)
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17 pages, 6657 KiB  
Article
Differential Pulse Voltammetric Electrochemical Sensor for the Detection of Etidronic Acid in Pharmaceutical Samples by Using rGO-Ag@SiO2/Au PCB
by Sathish Panneer Selvam, Somasekhar R. Chinnadayyala, Sungbo Cho and Kyusik Yun
Nanomaterials 2020, 10(7), 1368; https://doi.org/10.3390/nano10071368 - 14 Jul 2020
Cited by 11 | Viewed by 4386
Abstract
An rGO-Ag@SiO2 nanocomposite-based electrochemical sensor was developed to detect etidronic acid (EA) using the differential pulse voltammetric (DPV) technique. Rapid self-assembly of the rGO-Ag@SiO2 nanocomposite was accomplished through probe sonication. The developed rGO-Ag@SiO2 nanocomposite was used as an electrochemical sensing [...] Read more.
An rGO-Ag@SiO2 nanocomposite-based electrochemical sensor was developed to detect etidronic acid (EA) using the differential pulse voltammetric (DPV) technique. Rapid self-assembly of the rGO-Ag@SiO2 nanocomposite was accomplished through probe sonication. The developed rGO-Ag@SiO2 nanocomposite was used as an electrochemical sensing platform by drop-casting on a gold (Au) printed circuit board (PCB). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) confirmed the enhanced electrochemical active surface area (ECASA) and low charge transfer resistance (Rct) of the rGO-Ag@SiO2/Au PCB. The accelerated electron transfer and the high number of active sites on the rGO-Ag@SiO2/Au PCB resulted in the electrochemical detection of EA through the DPV technique with a limit of detection (LOD) of 0.68 μM and a linear range of 2.0–200.0 μM. The constructed DPV sensor exhibited high selectivity toward EA, high reproducibility in terms of different Au PCBs, excellent repeatability, and long-term stability in storage at room temperature (25 °C). The real-time application of the rGO-Ag@SiO2/Au PCB for EA detection was investigated using EA-based pharmaceutical samples. Recovery percentages between 96.2% and 102.9% were obtained. The developed DPV sensor based on an rGO-Ag@SiO2/Au PCB could be used to detect other electrochemically active species following optimization under certain conditions. Full article
(This article belongs to the Special Issue Carbon-Based Nanocoatings)
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