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Nanomaterials
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Electronic Applications of Graphene-Based Composites
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Electronic Applications of Graphene-Based Composites

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

Deadline for manuscript submissions: closed (8 February 2024) | Viewed by 12366

Special Issue Editors

Prof. Dr. Irina V. Antonova

E-Mail Website
Guest Editor
Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
Interests: graphene; derivatives; heterostructures; electronics devices; memristors; sensors
Special Issues, Collections and Topics in MDPI journals
Dr. Artem I. Ivanov

E-Mail Website
Assistant Guest Editor
Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
Interests: graphene; fluorinated graphene; 2D materials; core-shell nanoparticles; heterostructures; memristors; composite materials; 2D printing

Special Issue Information

Dear Colleagues,

Composite materials are formed by combining at least two or more materials with different properties, resulting in the unique output characteristics of the composite material and great achievements made possible by novel applications that were previously unknown. The development and advancement of next-generation composite materials have occurred in the biomedical industry, optoelectronic industry, and electronics industry. Composites from 2D materials have emerged as good platforms due to their mechanical strength, flexibility in electrical applications and optical properties.

The present Special Issue of Nanomaterials focuses on the latest developments of new composite materials and their practical applications. The strategies of composite synthesis, characterization techniques, and the mechanism of interaction between components are thoroughly discussed and examined since they are pivotal to understanding the properties of the composite. We invite authors to contribute original research articles and review articles covering the current progress on the development of composites from 2D materials and advancements in their applications.

Potential topics include (but are not limited to):

  • The synthesis of composites;
  • Properties of composites from 2D materials;
  • Electronic and optoelectronic applications.

Prof. Dr. Irina V. Antonova
Guest Editor

Dr. Artem I. Ivanov
Assistant Guest Editor

Manuscript Submission Information

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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

  • bandgap engineering
  • manage conductivity
  • synthetic strategies
  • self-organization
  • flexible structures
  • memristors
  • composite sensors
  • logic elements
  • bioinspired nanocomposites
  • energy-efficient devices

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Published Papers (6 papers)

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Research

20 pages, 5487 KiB  
Article
Nitrogen-Doped Graphene Materials with High Electrical Conductivity Produced by Electrochemical Exfoliation of Graphite Foil
by Hela Kammoun, Benjamin D. Ossonon and Ana C. Tavares
Nanomaterials 2024, 14(1), 123; https://doi.org/10.3390/nano14010123 - 4 Jan 2024
Viewed by 2987
Abstract
Nitrogen-doped graphene-based materials are of utmost importance in sensing and energy conversion devices due to their unique physicochemical properties. However, the presence of defects such as pyrrolic nitrogen and oxygenated functional groups reduces their electrical conductivity. Herein, a two-step approach based on the [...] Read more.
Nitrogen-doped graphene-based materials are of utmost importance in sensing and energy conversion devices due to their unique physicochemical properties. However, the presence of defects such as pyrrolic nitrogen and oxygenated functional groups reduces their electrical conductivity. Herein, a two-step approach based on the electrochemical exfoliation of graphite foils in aqueous mixed electrolytes followed by thermal reduction at 900 °C is used to prepare high-quality few layers of N-doped graphene-based materials. The exfoliations were conducted in 0.1 M (NH4)2SO4 or H2SO4 and HNO3 (5 mM or 0.1 M) electrolytes mixtures and the HNO3 vol% varied. Chemical analysis demonstrated that the as-prepared graphene oxides contain nitro and amine groups. Thermal reduction is needed for substitutional N-doping. Nitrogen and oxygen surface concentrations vary between 0.23–0.96% and 3–8%, respectively. Exfoliation in (NH4)2SO4 and/or 5 mM HNO3 favors the formation of pyridinic-N (10–40% of the total N), whereas 1 M HNO3 favors the formation of graphitic-N (≈60%). The electrical conductivity ranges between 166–2705 Scm−1. Raman spectroscopy revealed a low density of defects (ID/IG ratio between 0.1 and 0.7) and that most samples are composed of mono-to-bilayer graphene-based materials (IG/I2D integrated intensities ratio). Structural and compositional stability of selected samples after storage in air for three months is demonstrated. These results confirm the high quality of the synthesized undoped and N-doped graphene-type materials. Full article
(This article belongs to the Special Issue Electronic Applications of Graphene-Based Composites)
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9 pages, 6139 KiB  
Article
Electrostatic Tuning of Bilayer Graphene Edge Modes
by Hira Ali and Llorenç Serra
Nanomaterials 2023, 13(14), 2102; https://doi.org/10.3390/nano13142102 - 19 Jul 2023
Viewed by 1051
Abstract
We study the effect of a local potential shift induced by a side electrode on the edge modes at the boundary between gapped and ungapped bilayer graphene. A potential shift close to the gapped-ungapped boundary causes the emergence of unprotected edge modes, propagating [...] Read more.
We study the effect of a local potential shift induced by a side electrode on the edge modes at the boundary between gapped and ungapped bilayer graphene. A potential shift close to the gapped-ungapped boundary causes the emergence of unprotected edge modes, propagating in both directions along the boundary. These counterpropagating edge modes allow edge backscattering, as opposed to the case of valley-momentum-locked edge modes. We then calculate the conductance of a bilayer graphene wire in presence of finger-gate electrodes, finding strong asymmetries with energy inversion and deviations from conductance quantization that can be understood with the gate-induced unprotected edge modes. Full article
(This article belongs to the Special Issue Electronic Applications of Graphene-Based Composites)
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15 pages, 3830 KiB  
Article
Molecular Doping of CVD-Graphene Surfaces by Perfluoroalkyl-Substituted Perylene Diimides Derivatives
by Federico Chianese, Lucrezia Aversa, Roberto Verucchi and Antonio Cassinese
Nanomaterials 2022, 12(23), 4239; https://doi.org/10.3390/nano12234239 - 28 Nov 2022
Cited by 1 | Viewed by 1663
Abstract
Non-covalent π-π and dipolar interactions with small aromatic molecules have been widely demonstrated to be a valid option to tune graphene work functions without adding extrinsic scattering centers for charge carriers. In this work, we investigated the interaction between a CVD-graphene monolayer and [...] Read more.
Non-covalent π-π and dipolar interactions with small aromatic molecules have been widely demonstrated to be a valid option to tune graphene work functions without adding extrinsic scattering centers for charge carriers. In this work, we investigated the interaction between a CVD-graphene monolayer and a thermally evaporated sub-monolayer and the following few-layer thin films of similar perylene diimide derivatives: PDI8-CN2 and PDIF-CN2. The molecular influence on the graphene work function was estimated by XPS and UPS analysis and by investigating the surface potentials via scanning Kelvin probe force microscopy. The perfluorinated decoration and the steric interaction in the early stages of the film growth determined a positive work function shift as high as 0.7 eV in the case of PDIF-CN2, with respect to the value of 4.41 eV for the intrinsic graphene. Our results unambiguously highlight the absence of valence band shifts in the UPS analysis, indicating the prevalence of dipolar interactions between the graphene surface and the organic species enhanced by the presence of the fluorine-enriched moieties. Full article
(This article belongs to the Special Issue Electronic Applications of Graphene-Based Composites)
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7 pages, 1092 KiB  
Article
The Role of Structural Defects in the Growth of Two-Dimensional Diamond from Graphene
by Liubov A. Varlamova, Sergey V. Erohin and Pavel B. Sorokin
Nanomaterials 2022, 12(22), 3983; https://doi.org/10.3390/nano12223983 - 12 Nov 2022
Cited by 6 | Viewed by 1765
Abstract
The presented work is devoted to the study of the formation of the thinnest diamond film (diamane). We investigate the initial stages of diamond nucleation in imperfect bilayer graphene exposed by the deposition of H atoms (chemically induced phase transition). We show that [...] Read more.
The presented work is devoted to the study of the formation of the thinnest diamond film (diamane). We investigate the initial stages of diamond nucleation in imperfect bilayer graphene exposed by the deposition of H atoms (chemically induced phase transition). We show that defects serve as nucleation centers, their hydrogenation is energy favorable and depends on the defect type. Hydrogenation of vacancies facilitates the binding of graphene layers, but the impact wanes already at the second coordination sphere. Defects influence of 5|7 is lower but promotes diamondization. The grain boundary role is similar but can lead to the final formation of a diamond film consisting of chemically connected grains with different surfaces. Interestingly, even hexagonal and cubic two-dimensional diamonds can coexist together in the same film, which suggests the possibility of obtaining a new two-dimensional polycrystal unexplored before. Full article
(This article belongs to the Special Issue Electronic Applications of Graphene-Based Composites)
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9 pages, 4820 KiB  
Article
Highly Compressible Elastic Aerogel Spring-Based Piezoionic Self-Powering Pressure Sensor for Multifunctional Wearable Electronics
by Ning Wei, Yan Li, Chunqin Zhu and Yuxi Tang
Nanomaterials 2022, 12(15), 2574; https://doi.org/10.3390/nano12152574 - 27 Jul 2022
Cited by 6 | Viewed by 1862
Abstract
To meet the rapid development of wearable flexible electronics, the multifunctional integrations into singe device are in extreme demand. In this paper, we developed novel self-powering multifunctional pressure sensors and supercapacitor-integrated device based on highly elastic silver nanowires@reduced graphene aerogel, being conductive to [...] Read more.
To meet the rapid development of wearable flexible electronics, the multifunctional integrations into singe device are in extreme demand. In this paper, we developed novel self-powering multifunctional pressure sensors and supercapacitor-integrated device based on highly elastic silver nanowires@reduced graphene aerogel, being conductive to reduce integration difficulties and device size. Serving as an energy device, it behaves with a prominent specific capacitance of 146.6 F g−1, and excellent rate capability even at 500 mV s−1. The fabricated sensor demonstrates an excellent sensitivity of 2.54 kPa−1 and superior pressure-sensing stability up to 1000 compressive cycles. Piezoionization effect is suggested to reveal the sensing mechanism. Our research provides a new research direction in designing the integration of self-driving wearable electronics. Full article
(This article belongs to the Special Issue Electronic Applications of Graphene-Based Composites)
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12 pages, 3905 KiB  
Article
Graphene: Hexagonal Boron Nitride Composite Films with Low-Resistance for Flexible Electronics
by Irina V. Antonova, Marina B. Shavelkina, Artem I. Ivanov, Dmitriy A. Poteryaev, Nadezhda A. Nebogatikova, Anna A. Buzmakova, Regina A. Soots and Vladimir A. Katarzhis
Nanomaterials 2022, 12(10), 1703; https://doi.org/10.3390/nano12101703 - 17 May 2022
Cited by 7 | Viewed by 2175
Abstract
The structure and electric properties of hexagonal boron nitride (h-BN):graphene composite with additives of the conductive polymer PEDOT:PSS and ethylene glycol were examined. The graphene and h-BN flakes synthesized in plasma with nanometer sizes were used for experiments. It was found that the [...] Read more.
The structure and electric properties of hexagonal boron nitride (h-BN):graphene composite with additives of the conductive polymer PEDOT:PSS and ethylene glycol were examined. The graphene and h-BN flakes synthesized in plasma with nanometer sizes were used for experiments. It was found that the addition of more than 10−3 mass% of PEDOT:PSS to the graphene suspension or h-BN:graphene composite in combination with ethylene glycol leads to a strong decrease (4–5 orders of magnitude, in our case) in the resistance of the films created from these suspensions. This is caused by an increase in the conductivity of PEDOT:PSS due to the interaction with ethylene glycol and synergetic effect on the composite properties of h-BN:graphene films. The addition of PEDOT:PSS to the h-BN:graphene composite leads to the correction of the bonds between nanoparticles and a weak change in the resistance under the tensile strain caused by the sample bending. A more pronounced flexibility of the composite films with tree components is demonstrated. The self-organization effects for graphene flakes and polar h-BN flakes lead to the formation of micrometer sized plates in drops and uniform-in-size nanoparticles in inks. The ratio of the components in the composite was found for the observed strong hysteresis and a negative differential resistance. Generally, PEDOT:PSS and ethylene glycol composite films are promising for their application as electrodes or active elements for logic and signal processing. Full article
(This article belongs to the Special Issue Electronic Applications of Graphene-Based Composites)
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