Special Issue "Applications of Magnetization and Polarization for Molecules and Materials"

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetism and Magnetic Materials".

Deadline for manuscript submissions: closed (28 February 2021).

Special Issue Editors

Dr. Claudio Fontanesi
E-Mail Website
Guest Editor
DIEF, University of Modena and Reggio Emilia, 41125 Modena, Italy
Interests: physical electrochemistry; organic electronics; spin dependent electrochemistry
Dr. Francesco Tassinari
E-Mail Website
Guest Editor
Department of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel
Interests: Electrochemistry, Thin Films, Magnetic nanoparticles

Special Issue Information

Dear Colleagues,

Magneto-related effects in chemistry is a field in rapid growth and expansion, involving both fundamental and applicative aspects. This Special Issue focuses in particular, but not exclusively, on magnetic field effects combined with electric field effects, with particular emphasis on electrochemical-based systems. The effect of magnetic fields on the potential and current quantities characteristic of an electrochemical cell are typical observables worth measuring, as are the entangled effects of chiral systems (chiral surfaces) and the observation of spin-related effects. The relationship, also based on purely theoretical considerations, between spin and magnetic effects and a material’s electronic structure at the molecular level is also of great interest. Original papers as well as reviews on these subjects are welcome.

Prof. Claudio Fontanesi
Dr. Francesco Tassinari
Prof. Massimo Innocenti
Guest Editors

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 papers will be 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. Magnetochemistry 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 1600 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

  • Magnetoelectrochemistry
  • Magnetless spin effects
  • Solid state magnetoelectrochemistry
  • Hall effect measurements in electrochemical systems
  • Magnetic/electric field and charge transmission
  • Chirality
  • Spin

Published Papers (7 papers)

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Research

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Article
Radiation-Induced Effect on Spin-Selective Electron Transfer through Self-Assembled Monolayers of ds-DNA
Magnetochemistry 2021, 7(7), 98; https://doi.org/10.3390/magnetochemistry7070098 - 08 Jul 2021
Viewed by 336
Abstract
Stability of the DNA molecule is essential for the proper functioning and sustainability of all living organisms. In this study, we investigate the effect of gamma radiation (γ-radiation) on spin-selective electron transfer through double strand (ds)DNA molecules. Self-assembled monolayers (SAMs) of 21-base long [...] Read more.
Stability of the DNA molecule is essential for the proper functioning and sustainability of all living organisms. In this study, we investigate the effect of gamma radiation (γ-radiation) on spin-selective electron transfer through double strand (ds)DNA molecules. Self-assembled monolayers (SAMs) of 21-base long DNA are prepared on Au-coated Ni thin film. We measure the spin polarization (%) of the SAMs of ds-DNA using the spin-dependent electrochemical technique. We use a Cs-based γ-radiation source to expose the SAMs of ds-DNA immobilized on thin films for various time intervals ranging from 0–30 min. The susceptibility of DNA to γ-radiation is measured by spin-dependent electrochemistry. We observe that the efficiency of spin filtering by ds-DNA gradually decreases when exposure (to γ-radiation) time increases, and drops below 1% after 30 min of exposure. The change in spin polarization value is related either to the conformational perturbation in DNA or to structural damage in DNA molecules caused by ionizing radiation. Full article
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Article
Influence of Magnetic Field on the Electrodeposition and Capacitive Performances of MnO2
Magnetochemistry 2021, 7(2), 19; https://doi.org/10.3390/magnetochemistry7020019 - 25 Jan 2021
Viewed by 1434
Abstract
This study focuses on the influence of an applied external magnetic field on the electrodeposition process and capacitive performances of MnO2, as pseudo-capacitive active material for supercapacitors electrodes. MnO2 was electrochemically deposited on Si/Au substrates in the presence and in the absence of a 0.5 T magnet, and its capacitive performance was tested via electrochemical characterization. The samples obtained in the presence of the magnetic field show a positive influence on the deposition process: the increase in deposition efficiency leads to more compact and uniform MnO2 coatings, with a decrease in capacitance values for the samples produced with the magnetic field. Full article
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Article
Asymmetric Magnetoelectrochemistry: An Efficient Method to Grow Enantiopure Self-Assemble Monolayer
Magnetochemistry 2020, 6(3), 37; https://doi.org/10.3390/magnetochemistry6030037 - 01 Sep 2020
Cited by 1 | Viewed by 957
Abstract
In this work, we are presenting magnetic field dependent electrochemical method to grow enantiopure monolayer. Thiol gold monolayer formation by redox reaction is studied on gold coated ferromagnetic surface. Infrared and photoemission spectroscopies are used to probe the quality of the monolayers, grown [...] Read more.
In this work, we are presenting magnetic field dependent electrochemical method to grow enantiopure monolayer. Thiol gold monolayer formation by redox reaction is studied on gold coated ferromagnetic surface. Infrared and photoemission spectroscopies are used to probe the quality of the monolayers, grown using different direction of magnetization of surface. Commercially available chiral molecules, L-cysteine along with dsDNA are used as control molecules for the measurements. Since it is established by aligning the electron spin within the surface, it helps to adsorb specific enantiomer of molecules, we have shown how direction of the magnet helps to grow good quality monolayer. Potential application of this work is in improving quality of monolayer and chiral separation. Full article
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Article
Magnetoelectrochemistry and Asymmetric Electrochemical Reactions
Magnetochemistry 2020, 6(1), 1; https://doi.org/10.3390/magnetochemistry6010001 - 18 Dec 2019
Cited by 5 | Viewed by 1418
Abstract
Magnetoelectrochemistry is a branch of electrochemistry where magnetic fields play a vital role in the oxidation and reduction process of the molecules. When it comes to spin-dependent electrochemistry (SDE), becomes a new paradigm. This work presents electrochemical response during the “chiral imprinting” on [...] Read more.
Magnetoelectrochemistry is a branch of electrochemistry where magnetic fields play a vital role in the oxidation and reduction process of the molecules. When it comes to spin-dependent electrochemistry (SDE), becomes a new paradigm. This work presents electrochemical response during the “chiral imprinting” on working electrodes and the effects of potentiostatic and galvanostatic methods. We explore the use of the SDE concept, which is implemented for chiral-ferromagnetic (CFM) hybrid working electrodes, and we compare various electrochemical parameters affecting the quality of deposition. We electrochemically co-deposited nickel (Ni) with a chiral compound (tartaric acid) in its enantiopure forms (L and D), which allows us to obtain a chiral co-deposited nickel-tartaric acid (Ni-LTA or Ni-DTA) working electrode. Full article
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Article
Surface Chirality in Rotational Magnetoelectrodeposition of Copper Films
Magnetochemistry 2019, 5(3), 53; https://doi.org/10.3390/magnetochemistry5030053 - 12 Sep 2019
Cited by 1 | Viewed by 838
Abstract
Chiral surface formation was investigated in rotational magnetoelectrodeposition (RMED) of copper films, where an electrochemical cell was rotated in magnetic fields. The RMED was conducted with clockwise or anticlockwise rotation in the magnetic fields parallel or antiparallel to the ionic currents. The rotational [...] Read more.
Chiral surface formation was investigated in rotational magnetoelectrodeposition (RMED) of copper films, where an electrochemical cell was rotated in magnetic fields. The RMED was conducted with clockwise or anticlockwise rotation in the magnetic fields parallel or antiparallel to the ionic currents. The rotational frequencies were 0.5–6 Hz, and the magnetic fields were 2–5 T. The chiral behaviors are divided into four types: type I has chirality depending on the magnetic field polarity, type II has chirality depending on the rotational direction, and type III has chirality depending on both directions. Type IV represents chiral symmetry breaking, where the RMED films exhibit only L activity in any magnetic field polarity and rotational direction. Full article
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Review

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Review
Nano-Structured Dilute Magnetic Semiconductors for Efficient Spintronics at Room Temperature
Magnetochemistry 2020, 6(1), 15; https://doi.org/10.3390/magnetochemistry6010015 - 16 Mar 2020
Cited by 12 | Viewed by 1472
Abstract
In recent years, many efforts have been made to develop advanced metal oxide semiconductor nanomaterials with exotic magnetic properties for modern applications w.r.t traditional analogues. Dilute magnetic semiconductor oxides (DMSOs) are promising candidates for superior control over the charge and spin degrees of [...] Read more.
In recent years, many efforts have been made to develop advanced metal oxide semiconductor nanomaterials with exotic magnetic properties for modern applications w.r.t traditional analogues. Dilute magnetic semiconductor oxides (DMSOs) are promising candidates for superior control over the charge and spin degrees of freedom. DMSOs are transparent, wide band gap materials with induced ferromagnetism in doping, with a minor percentage of magnetic 3d cation to create a long-range antiferromagnetic order. Although significant efforts have been carried out to achieve DMSO with ferromagnetic properties above room temperature, it is a great challenge that still exists. However, TiO2, SnO2, ZnO and In2O3 with wide band gaps of 3.2, 3.6, 3.2 and 2.92 eV, respectively, can host a broad range of dopants to generate various compositions. Interestingly, a reduction in the size of these binary oxides can induce ferromagnetism, even at room temperature, due to the grain boundary, presence of defects and oxygen vacancies. The present review provides a panorama of the structural analysis and magnetic properties of DMSOs based on binary metal oxides nanomaterials with various ferromagnetic or paramagnetic dopants, e.g., Co, V, Fe and Ni, which exhibit enhanced ferromagnetic behaviors at room temperature. Full article
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Other

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Perspective
False Chirality, Absolute Enantioselection and CP Violation: Pierre Curie’s Legacy
Magnetochemistry 2020, 6(1), 5; https://doi.org/10.3390/magnetochemistry6010005 - 15 Jan 2020
Cited by 7 | Viewed by 1463
Abstract
The 1884 suggestion of Pierre Curie (1859–1906) that the type of dissymmetry shown by collinear electric and magnetic fields may induce an enantiomeric excess, in a chemical reaction that would otherwise produce a racemic mixture, is explored in the context of fundamental symmetry [...] Read more.
The 1884 suggestion of Pierre Curie (1859–1906) that the type of dissymmetry shown by collinear electric and magnetic fields may induce an enantiomeric excess, in a chemical reaction that would otherwise produce a racemic mixture, is explored in the context of fundamental symmetry arguments. Curie’s arrangement exhibits false chirality (time-noninvariant enantiomorphism), and so it may not induce absolute enantioselection (ae) in a process that has reached thermodynamic equilibrium, since it does not lift the degeneracy of chiral enantiomers. However, it may do so in far-from-equilibrium processes via a breakdown in microscopic reversibility analogous to that observed in elementary particle processes under the influence of CP violation, the associated force possessing false chirality with respect to CP enantiomorphism. In contrast, an influence like circularly polarized light exhibiting true chirality (time-invariant enantiomorphism) lifts the degeneracy of enantiomers, and so may induce ae in all circumstances. Although to date, ae has not been observed under the influence of Curie’s arrangement of collinear electric and magnetic fields, it is argued that two different experiments have now demonstrated ae under a falsely chiral influence in systems far from equilibrium, namely in a spinning sample under a gravitational field, and in the separation of enantiomers at a ferromagnetic surface. Full article
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