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Nanomaterials
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Chirality in Micro-Nanostructures and Physical Chemical Applications
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Chirality in Micro-Nanostructures and Physical Chemical Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 3240

Special Issue Editors

Dr. Gabriele Giancane

E-Mail Website
Guest Editor
Dipartimento di Beni Culturali, Universita del Salento, Lecce, Italy
Interests: plasmonic nanoparticles; paramagnetic nanoparticles; organic and inorganic sensors; Raman and IR spectroscopy; photoinduced phenomena; optical activity measurements; chiral recognition
Special Issues, Collections and Topics in MDPI journals
Dr. Simona Bettini

E-Mail Website
Guest Editor
Dipartimento di Ingegneria dell’Innovazione, Università del Salento, 73100 Lecce, Italy
Interests: supramolecular physical chemistry; synthesis and functionalization of inorganic and organic nanocolloids; molecular spectroscopy; organic thin layers for different applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The chiral activity observed in single nanostructures and in their assemblies has found several new application fields in recent years. Chiral nanoparticles include a wide group of mirror-asymmetric constructs with vastly different intrinsic properties. Multiple chiral geometries of metals, semiconductors, ceramics, and nanocarbons have been assembled and engineered to attain a broad range of optical and chemical properties.

These features as chiral materials have enabled their rapid and efficient technological translation for several potential applications, including (bio)sensing and optoelectronics, which, in turn, have opened new fascinating and multifaceted scenarios regarding chirality and nanotechnologies.

The research topics of the present Special Issue include but are not limited to the following subjects:

  • Design and synthesis of micro-nanostructures;
  • Functionalization procedures and surface modifications of micro-nanostructures;
  • Physical and chemical characterizations of micro-nanostructures;
  • Opto-electronic applications of chiral micro-nanostructures;
  • Applications of micro-nanostructures in sensing and biosensing;
  • Bio-applications of chiral micro-nanostructures.

Both research papers and review articles will be considered.

Dr. Gabriele Giancane
Dr. Simona Bettini
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 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

  • chirality
  • nanoparticles
  • plasmon nanoparticles
  • (bio)sensing
  • chiral recognition
  • circular dichroism

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Published Papers (2 papers)

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Research

11 pages, 3351 KiB  
Article
Synthesis and Characterization of Gold Chiral Nanoparticles Functionalized by a Chiral Drug
by Simona Bettini, Michela Ottolini, Donato Valli, Rosanna Pagano, Chiara Ingrosso, Maarten Roeffaers, Johan Hofkens, Ludovico Valli and Gabriele Giancane
Nanomaterials 2023, 13(9), 1526; https://doi.org/10.3390/nano13091526 - 30 Apr 2023
Cited by 2 | Viewed by 2910
Abstract
Inorganic chiral nanoparticles are attracting more and more attention due to their peculiar optical properties and potential biological applications, such as bioimaging, therapeutics, and diagnostics. Among inorganic chiral nanoparticles, gold chiral nanostructures were demonstrated to be very interesting in this context, with good [...] Read more.
Inorganic chiral nanoparticles are attracting more and more attention due to their peculiar optical properties and potential biological applications, such as bioimaging, therapeutics, and diagnostics. Among inorganic chiral nanoparticles, gold chiral nanostructures were demonstrated to be very interesting in this context, with good physical chemical stability and also the possibility to decorate the surface, improving biomedical application as the interaction with the bio-systems. Gold (Au) nanostructures were synthesized according to a seed-mediated procedure which envisages the use of cetyltrimethylammonium bromide (CTAB) as the capping agent and L- and D-cysteine to promote chirality. Au nanostructures have been demonstrated to have opposite circular dichroism signals depending on the amino acid enantiomer used during the synthesis. Then, a procedure to decorate the Au surface with penicillamine, a drug used for the treatment of Wilson’s disease, was developed. The composite material of gold nanoparticles/penicillamine was characterized using electron microscopy, and the penicillamine functionalization was monitored by means of UV-Visible, Raman, and infrared spectroscopy, highlighting the formation of the Au–S bond. Furthermore, electron circular dichroism was used to monitor the chirality of the synthesized nanostructures and it was demonstrated that both penicillamine enantiomers can be successfully bonded with both the enantiomers of the gold nanostructures without affecting gold nanoparticles’ chirality. The effective modification of nanostructures’ surfaces via penicillamine introduction allowed us to address the important issue of controlling chirality and surface properties in the chiral nano-system. Full article
(This article belongs to the Special Issue Chirality in Micro-Nanostructures and Physical Chemical Applications)
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18 pages, 5425 KiB  
Article
Deposition of Chiral Heptahelicene Molecules on Ferromagnetic Co and Fe Thin-Film Substrates
by Mohammad Reza Safari, Frank Matthes, Karl-Heinz Ernst, Daniel E. Bürgler and Claus M. Schneider
Nanomaterials 2022, 12(19), 3281; https://doi.org/10.3390/nano12193281 - 21 Sep 2022
Cited by 8 | Viewed by 3041
Abstract
The discovery of chirality-induced spin selectivity (CISS), resulting from an interaction between the electron spin and handedness of chiral molecules, has sparked interest in surface-adsorbed chiral molecules due to potential applications in spintronics, enantioseparation, and enantioselective chemical or biological processes. We study the [...] Read more.
The discovery of chirality-induced spin selectivity (CISS), resulting from an interaction between the electron spin and handedness of chiral molecules, has sparked interest in surface-adsorbed chiral molecules due to potential applications in spintronics, enantioseparation, and enantioselective chemical or biological processes. We study the deposition of chiral heptahelicene by sublimation under ultra-high vacuum onto bare Cu(111), Co bilayer nanoislands on Cu(111), and Fe bilayers on W(110) by low-temperature spin-polarized scanning tunneling microscopy/spectroscopy (STM/STS). In all cases, the molecules remain intact and adsorb with the proximal phenanthrene group aligned parallel to the surface. Three degenerate in-plane orientations on Cu(111) and Co(111), reflecting substrate symmetry, and only two on Fe(110), i.e., fewer than symmetry permits, indicate a specific adsorption site for each substrate. Heptahelicene physisorbs on Cu(111) but chemisorbs on Co(111) and Fe(110) bilayers, which nevertheless remain for the sub-monolayer coverage ferromagnetic and magnetized out-of-plane. We are able to determine the handedness of individual molecules chemisorbed on Fe(110) and Co(111), as previously reported for less reactive Cu(111). The demonstrated deposition control and STM/STS imaging capabilities for heptahelicene on Co/Cu(111) and Fe/W(110) substrate systems lay the foundation for studying CISS in ultra-high vacuum and on the microscopic level of single molecules in controlled atomic configurations. Full article
(This article belongs to the Special Issue Chirality in Micro-Nanostructures and Physical Chemical Applications)
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