Nanotechnology and Symmetry

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 7330

Special Issue Editor


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Guest Editor
INFN-Laboratori Nazionali di Frascati, 00044 Frascati, Italy
Interests: carbon nanotubes; material sciences; nanotechnology; multifunctional materials; nano carbon; biomedical applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Nanotechnology plays an important role in modern society, and will be the focus of increased interest in the near future. This interest derives from the manifold possible applications, but also stems from the exceptional properties that characterize nanomaterials, often due to their beautiful symmetry features. Research about symmetry in nanoscience is making enormous strides, and it is important to spread these discoveries to assist the scientific community and to provide inspiration for future research. Topics such as symmetries and interactions in graphene honeycomb lattice, the symmetries of graphene-related materials, e.g., two-dimensional transition metal dichalcogenides, chiral symmetry and its breakdown, Raman spectroscopy and the mathematical description of symmetry as related to molecules and crystals, dynamical symmetries in quantum dots, and quantum symmetry breaking in single-spin systems are all to be included in this Special Issue.

Prof. Stefano Bellucci
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. Symmetry is an international peer-reviewed open access monthly 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 2400 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

  • Nanotechnology
  • symmetry
  • graphene
  • Raman spectroscopy
  • transition metal dichalcogenides
  • chiral symmetry breaking
  • quantum symmetry breaking
  • dynamical symmetries

Published Papers (3 papers)

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Research

12 pages, 4340 KiB  
Article
Cobalt Oxide on a Nanoporous TUD-1 Catalyst for Methylene Blue Dye Interaction DFT Studies and Degradation
by Muthusamy Poomalai Pachamuthu, Sambath Baskaran, Chandrakumar Manivannan, Somasundaram Chandra Kishore, Stefano Bellucci and Ramasamy Boopathy
Symmetry 2021, 13(9), 1754; https://doi.org/10.3390/sym13091754 - 20 Sep 2021
Cited by 1 | Viewed by 2099
Abstract
Fenton and Fenton-like advanced oxidation processes (AOP) have been substantially utilized in wastewater treatment for the removal of organic contaminants. The present investigation explores the catalytic activity of cobalt dispersed over nanoporous silicate material (CoO/TUD-1), TUD-1, for the Fenton-type degradation of methylene blue [...] Read more.
Fenton and Fenton-like advanced oxidation processes (AOP) have been substantially utilized in wastewater treatment for the removal of organic contaminants. The present investigation explores the catalytic activity of cobalt dispersed over nanoporous silicate material (CoO/TUD-1), TUD-1, for the Fenton-type degradation of methylene blue (MB) dye present in wastewater, with hydrogen peroxide (H2O2) as an oxidant. The catalyst, which was prepared using the hydrothermal method, was characterized using analytical and spectroscopic techniques, such as X-ray diffraction (XRD), N2 adsorption–desorption isotherms, UV-visible diffuse reflectance (DR), scanning electron microscope (SEM), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR). The results indicated that the CoO/TUD-1 possessed three-dimensional structures with a high surface area and a pore diameter capable of the uniform dispersion of cobalt species. Density functional theory (DFT) simulations were performed to study the most stable tetra coordinate adsorption configuration of a single Co atom on amorphous SiO2. To understand the geometric and electronic structure of this configuration, electron density differences, Bader charge, and partial density of states were examined. The results obtained from the DFT calculations confirmed the occurrence of electron transfer from the Co atom to the amorphous SiO2. The calculated adsorption energy was found to be −1.58 eV, which indicated that the MB dye was strongly adsorbed by parallel configuration mode and degraded more easily. Further, the addition of a 0.1g/L dose of the prepared CoO /TUD degraded the MB dye effectively (~95%) within 240 min of contact. Thus, CoO/TUD-1 is a potential material for the removal of organic contaminants and the degradation of dyes in wastewater treatment. Full article
(This article belongs to the Special Issue Nanotechnology and Symmetry)
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9 pages, 6516 KiB  
Article
Impact of Ultrashort Laser Nanostructuring on Friction Properties of AISI 314 LVC
by Walid Alnusirat, Maksym Kyrychok, Stefano Bellucci and Iaroslav Gnilitskyi
Symmetry 2021, 13(6), 1049; https://doi.org/10.3390/sym13061049 - 10 Jun 2021
Cited by 1 | Viewed by 1903
Abstract
Laser irradiation yields a powerful tool to modify the symmetry and asymmetry features of materials surfaces. In this paper, femtosecond laser-induced periodic surface structures were applied on stainless steel AISI 314, specially hardened by a low-vacuum carburizing procedure. Symmetry modifications in the surface’s [...] Read more.
Laser irradiation yields a powerful tool to modify the symmetry and asymmetry features of materials surfaces. In this paper, femtosecond laser-induced periodic surface structures were applied on stainless steel AISI 314, specially hardened by a low-vacuum carburizing procedure. Symmetry modifications in the surface’s morphology and chemistry before and after the laser treatment were investigated by SEM and EDS, respectively. Coefficient of friction (COF) was observed in dry sliding condition by using block-on-ring sliding test. The results show that COF values are substantially lower after laser-induced periodic surface structures (LIPSS) surface treatment. Full article
(This article belongs to the Special Issue Nanotechnology and Symmetry)
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14 pages, 1251 KiB  
Article
Comparison of the Optical Planar Waveguide Sensors’ Characteristics Based on Guided-Mode Resonance
by S. Bellucci, V. Fitio, I. Yaremchuk, O. Vernyhor, A. Bendziak and Y. Bobitski
Symmetry 2020, 12(8), 1315; https://doi.org/10.3390/sym12081315 - 6 Aug 2020
Cited by 7 | Viewed by 2113
Abstract
A comparison of optical sensors’ characteristics based on guided-mode resonance has been carried out. It was considered a prism structure with a metal film, a metal grating on a metal substrate and a dielectric grating on a dielectric substrate. It is shown that [...] Read more.
A comparison of optical sensors’ characteristics based on guided-mode resonance has been carried out. It was considered a prism structure with a metal film, a metal grating on a metal substrate and a dielectric grating on a dielectric substrate. It is shown that the main characteristics are determined by the sensitivity of the constant propagation of the respective waveguides on a change in wavelength and a change in the refractive index of the tested medium. In addition, they depend on the full width at half maximum of the spectral or angular reflectance dependence. The corresponding analytical relationships obtained for the three types of sensors are almost the same. It is demonstrated that the ratio of the sensor spectral sensitivity on the resonance curve spectral width is equal to the ratio of the angular sensitivity on the angular width of the corresponding resonance curve for all three types of sensors. Full article
(This article belongs to the Special Issue Nanotechnology and Symmetry)
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