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Nanomaterials
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Electronic Structure, Optical, Electrical Properties and Applications of Chemically Modified...
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Electronic Structure, Optical, Electrical Properties and Applications of Chemically Modified Graphene

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

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 9162

Special Issue Editor

Prof. Dr. Pavel Brunkov

E-Mail Website
Guest Editor
Ioffe Institute, Saint Petersburg, Russia
Interests: carbon nanomaterials; semiconductor heterostructures with quantum wells and quantum dots

Special Issue Information

Dear Colleagues,

The synthesis and study of chemically modified graphenes has become a new step in the developing field of 2D carbon nanomaterials. The functionalization of graphene has provided scientific and technological excitement for researchers in various disciplines due to the exceptional opportunity to controllably tune chemical and physical properties in a wide range. As a result, the family of chemically modified graphenes is rapidly evolving today, with a series of new graphene derivatives being synthesized and applied every year.

The Special Issue aims to assemble a collection of advanced scientific findings covering recent progress in the synthesis, investigation, and application of chemically modified graphenes. This includes a broad range of topics, including new approaches for the chemical derivatization of graphene or graphene oxide, experimental and theoretical research on the interplay between the physical and chemical properties of functionalized graphenes and their chemical composition, the application of chemically modified graphenes for bio- and gas sensors, electronic devices, energy composites, biotechnology, as well as nanocomposites.

We welcome you to submit your original research or review-type articles, providing the state-of-the-art in the field of “Chemically Modified Graphenes”.

Prof. Dr. Pavel Brunkov
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
  • graphene oxide
  • chemically modified graphene
  • functionalized graphene
  • nanocomposites
  • bio- and gas sensors
  • electronic devices

Published Papers (3 papers)

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Research

19 pages, 5082 KiB  
Article
Graphene Oxide Chemistry Management via the Use of KMnO4/K2Cr2O7 Oxidizing Agents
by Kseniya A. Shiyanova, Maksim V. Gudkov, Maxim K. Rabchinskii, Liliia A. Sokura, Dina Y. Stolyarova, Marina V. Baidakova, Dmitriy P. Shashkin, Andrei D. Trofimuk, Dmitry A. Smirnov, Ivan A. Komarov, Victoria A. Timofeeva and Valery P. Melnikov
Nanomaterials 2021, 11(4), 915; https://0-doi-org.brum.beds.ac.uk/10.3390/nano11040915 - 03 Apr 2021
Cited by 8 | Viewed by 3410
Abstract
In this paper, we propose a facile approach to the management of graphene oxide (GO) chemistry via its synthesis using KMnO4/K2Cr2O7 oxidizing agents at different ratios. Using Fourier Transformed Infrared Spectroscopy, X-ray Photoelectron Spectroscopy, and X-ray [...] Read more.
In this paper, we propose a facile approach to the management of graphene oxide (GO) chemistry via its synthesis using KMnO4/K2Cr2O7 oxidizing agents at different ratios. Using Fourier Transformed Infrared Spectroscopy, X-ray Photoelectron Spectroscopy, and X-ray Absorption Spectroscopy, we show that the number of basal-plane and edge-located oxygenic groups can be controllably tuned by altering the KMnO4/K2Cr2O7 ratio. The linear two-fold reduction in the number of the hydroxyls and epoxides with the simultaneous three-fold rise in the content of carbonyls and carboxyls is indicated upon the transition from KMnO4 to K2Cr2O7 as a predominant oxidizing agent. The effect of the oxidation mixture’s composition on the structure of the synthesized GOs is also comprehensively studied by means of X-ray diffraction, Raman spectroscopy, transmission electron microscopy, atomic-force microscopy, optical microscopy, and the laser diffraction method. The nanoscale corrugation of the GO platelets with the increase of the K2Cr2O7 content is signified, whereas the 10–100 μm lateral size, lamellar, and defect-free structure is demonstrated for all of the synthesized GOs regardless of the KMnO4/K2Cr2O7 ratio. The proposed method for the synthesis of GO with the desired chemistry opens up new horizons for the development of graphene-based materials with tunable functional properties. Full article
(This article belongs to the Special Issue Electronic Structure, Optical, Electrical Properties and Applications of Chemically Modified Graphene)
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12 pages, 2787 KiB  
Article
Two–Dimensional Disposable Graphene Sensor to Detect Na+ Ions
by Hong Gi Oh, Dong Cheol Jeon, Mahmudah Salwa Gianti, Hae Shin Cho, Da Ae Jo, Muhammad Naufal Indriatmoko, Byoung Kuk Jang, Joon Mook Lim, Seungmin Cho and Kwang Soup Song
Nanomaterials 2021, 11(3), 787; https://0-doi-org.brum.beds.ac.uk/10.3390/nano11030787 - 19 Mar 2021
Cited by 7 | Viewed by 2332
Abstract
The monitoring of Na+ ions distributed in the body has been indirectly calculated by the detection of Na+ ions in urine. We fabricated a two–dimensional (2D) Na+ ion sensor using a graphene ion–sensitive field–effect transistor (G–ISFET) and used fluorinated graphene [...] Read more.
The monitoring of Na+ ions distributed in the body has been indirectly calculated by the detection of Na+ ions in urine. We fabricated a two–dimensional (2D) Na+ ion sensor using a graphene ion–sensitive field–effect transistor (G–ISFET) and used fluorinated graphene as a reference electrode (FG–RE). We integrated G–ISFET and FG on a printed circuit board (PCB) designed in the form of a secure digital (SD) card to fabricate a disposable Na+ ion sensor. The sensitivity of the PCB tip to Na+ ions was determined to be −55.4 mV/dec. The sensor exhibited good linearity despite the presence of interfering ions in the buffer solution. We expanded the evaluation of the PCB tip to real human patient urine samples. The PCB tip exhibited a sensitivity of −0.36 mV/mM and linearly detected Na+ ions in human patient urine without any dilution process. We expect that G–ISFET with FG–RE can be used to realize a disposable Na+ ion sensor by serving as an alternative to Ag/AgCl reference electrodes. Full article
(This article belongs to the Special Issue Electronic Structure, Optical, Electrical Properties and Applications of Chemically Modified Graphene)
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10 pages, 2042 KiB  
Communication
Spectral-Phase Interferometry Detection of Ochratoxin A via Aptamer-Functionalized Graphene Coated Glass
by Nikita Nekrasov, Natalya Yakunina, Averyan V. Pushkarev, Alexey V. Orlov, Ivana Gadjanski, Amaia Pesquera, Alba Centeno, Amaia Zurutuza, Petr I. Nikitin and Ivan Bobrinetskiy
Nanomaterials 2021, 11(1), 226; https://0-doi-org.brum.beds.ac.uk/10.3390/nano11010226 - 16 Jan 2021
Cited by 12 | Viewed by 2753
Abstract
In this work, we report a novel method of label-free detection of small molecules based on direct observation of interferometric signal change in graphene-modified glasses. The interferometric sensor chips are fabricated via a conventional wet transfer method of CVD-grown graphene onto the glass [...] Read more.
In this work, we report a novel method of label-free detection of small molecules based on direct observation of interferometric signal change in graphene-modified glasses. The interferometric sensor chips are fabricated via a conventional wet transfer method of CVD-grown graphene onto the glass coverslips, lowering the device cost and allowing for upscaling the sensor fabrication. For the first time, we report the use of graphene functionalized by the aptamer as the bioreceptor, in conjunction with Spectral-Phase Interferometry (SPI) for detection of ochratoxin A (OTA). In a direct assay with an OTA-specific aptamer, we demonstrated a quick and significant change of the optical signal in response to the maximum tolerable level of OTA concentration. The sensor regeneration is possible in urea solution. The developed platform enables a direct method of kinetic analysis of small molecules using a low-cost optical chip with a graphene-aptamer sensing layer. Full article
(This article belongs to the Special Issue Electronic Structure, Optical, Electrical Properties and Applications of Chemically Modified Graphene)
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