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Carbon Nanotubes 2018
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Carbon Nanotubes 2018

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 June 2019) | Viewed by 12780

Special Issue Editors

Dr. Giuseppe Cirillo

E-Mail Website
Guest Editor
Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
Interests: nanomaterials; biomaterials; carbon nanostructures; composite and hybrid materials; biomedical applications of functional materials; therapeutic devices; surface chemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Silke Hampel

E-Mail Website
Guest Editor
IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany
Interests: carbon nanostructures; hybrid nanomaterials; filled carbon nanotubes; magnetic nanoparticles; functional nanocrystals

Special Issue Information

Dear Colleagues,

Since their discovery in 1990s by Iijima, carbon nanotubes (CNT) have gained great interest within scientific community. Such sp2 carbon nanomaterials have been proposed for use in different technological fields, including chemistry, engineering, materials science, and nanomedicine. This Special Issue aims to be a platform for scientists working on exploring the CNT-related structures from both a fundamental and application point of views, sharing the new insights into the tailored functionalization procedures for conferring specific activities. Topics include, but are not restricted to, covalent and non-covalent functionalization routes with small molecules and/or macromolecules, development of instrumental and functional characterization techniques, innovative application opportunities, as well as the key advantages and limitation in long term use.

Dr. Giuseppe Cirillo
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. 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 2600 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

  • Carbon Nanotubes
  • Nanomedicine
  • Functionalization Approaches
  • Characterization Techniques

Published Papers (3 papers)

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Research

14 pages, 2513 KiB  
Article
Combining Carbon Nanotubes and Chitosan for the Vectorization of Methotrexate to Lung Cancer Cells
by Giuseppe Cirillo, Orazio Vittorio, David Kunhardt, Emanuele Valli, Florida Voli, Annafranca Farfalla, Manuela Curcio, Umile Gianfranco Spizzirri and Silke Hampel
Materials 2019, 12(18), 2889; https://doi.org/10.3390/ma12182889 - 06 Sep 2019
Cited by 47 | Viewed by 3438
Abstract
A hybrid system composed of multi-walled carbon nanotubes coated with chitosan was proposed as a pH-responsive carrier for the vectorization of methotrexate to lung cancer. The effective coating of the carbon nanostructure by chitosan, quantified (20% by weight) by thermogravimetric analysis, was assessed [...] Read more.
A hybrid system composed of multi-walled carbon nanotubes coated with chitosan was proposed as a pH-responsive carrier for the vectorization of methotrexate to lung cancer. The effective coating of the carbon nanostructure by chitosan, quantified (20% by weight) by thermogravimetric analysis, was assessed by combined scanning and transmission electron microscopy, and X-ray photoelectron spectroscopy (N1s signal), respectively. Furthermore, Raman spectroscopy was used to characterize the interaction between polysaccharide and carbon counterparts. Methotrexate was physically loaded onto the nanohybrid and the release profiles showed a pH-responsive behavior with higher and faster release in acidic (pH 5.0) vs. neutral (pH 7.4) environments. Empty nanoparticles were found to be highly biocompatible in either healthy (MRC-5) or cancerous (H1299) cells, with the nanocarrier being effective in reducing the drug toxicity on MRC-5 while enhancing the anticancer activity on H1299. Full article
(This article belongs to the Special Issue Carbon Nanotubes 2018)
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12 pages, 4741 KiB  
Article
Further Enhancement of Mechanical Properties of Conducting Rubber Composites Based on Multiwalled Carbon Nanotubes and Nitrile Rubber by Solvent Treatment
by Pasi Keinänen, Amit Das and Jyrki Vuorinen
Materials 2018, 11(10), 1806; https://doi.org/10.3390/ma11101806 - 23 Sep 2018
Cited by 5 | Viewed by 3035
Abstract
Post-treatment removal of dispersion agents from carbon nanotube/rubber composites can greatly enhance the mechanical properties by increasing the filler–matrix interaction. In this study, multiwall carbon nanotubes (MWNT) were dispersed in water by sonication and nonionic surfactant, octyl-phenol-ethoxylate was used as a dispersion agent. [...] Read more.
Post-treatment removal of dispersion agents from carbon nanotube/rubber composites can greatly enhance the mechanical properties by increasing the filler–matrix interaction. In this study, multiwall carbon nanotubes (MWNT) were dispersed in water by sonication and nonionic surfactant, octyl-phenol-ethoxylate was used as a dispersion agent. The dispersed MWNTs were incorporated in thermo-reactive acrylonitrile butadiene rubber (NBR) latex and nanocomposite films were prepared by solution casting. As a post-treatment, the surfactant was removed with acetone and films were dried in air. Dispersion quality of the colloid before casting was determined, and mechanical, electrical and thermal properties of the composites before and after the acetone post-treatment were studied. It was found that removal of dispersion agent increased the storage modulus of films between 160–300% in all samples. Relative enhancement was greater in samples with better dispersion quality, whereas thermal conductivity changed more in samples with smaller dispersion quality values. Electrical properties were not notably affected. Full article
(This article belongs to the Special Issue Carbon Nanotubes 2018)
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10 pages, 2000 KiB  
Article
Piezoelectric Response of Multi-Walled Carbon Nanotubes
by Marina V. Il’ina, Oleg I. Il’in, Yuriy F. Blinov, Alexey A. Konshin, Boris G. Konoplev and Oleg A. Ageev
Materials 2018, 11(4), 638; https://doi.org/10.3390/ma11040638 - 21 Apr 2018
Cited by 42 | Viewed by 5405
Abstract
Recent studies in nanopiezotronics have indicated that strained graphene may exhibit abnormal flexoelectric and piezoelectric properties. Similar assumptions have been made with regard to the properties of carbon nanotubes (CNTs), however, this has not so far been confirmed. This paper presents the results [...] Read more.
Recent studies in nanopiezotronics have indicated that strained graphene may exhibit abnormal flexoelectric and piezoelectric properties. Similar assumptions have been made with regard to the properties of carbon nanotubes (CNTs), however, this has not so far been confirmed. This paper presents the results of our experimental studies confirming the occurrence of a surface piezoelectric effect in multi-walled CNTs under a non-uniform strain. Using atomic force microscopy, we demonstrated the piezoelectric response of multi-walled CNTs under compression and bending. The current generated by deforming an individual CNT was shown to be −24 nA. The value of the surface potential at the top of the bundle of strained CNTs varied from 268 mV to −110 mV, depending on strain type and magnitude. We showed that the maximum values of the current and the surface potential can be achieved when longitudinal strain predominates in a CNT. However, increasing the bending strain of CNTs does not lead to a significant increase in current and surface potential, due to the mutual compensation of piezoelectric charges concentrated on the CNT side walls. The results of the study offer a number of opportunities and challenges for further fundamental research on the piezoelectric properties of carbon nanotubes as well as for the development of advanced CNT-based nanopiezotronic devices. Full article
(This article belongs to the Special Issue Carbon Nanotubes 2018)
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