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Gas Sensitive Materials and Devices

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

Deadline for manuscript submissions: closed (30 April 2019) | Viewed by 6197

Special Issue Editor

Special Issue Information

Dear Colleagues,

We invite you to submit original research articles, communications, and reviews in this Special Issue of Material, titled "Gas Sensitive Materials and Devices". The aim of this Special Issue is to deal with several aspects, from synthesis and engineering of gas sensitive materials, design of gas sensing devices, evaluation of sensing performance and applications exploration (medical diagnostics, industry, environmental control, food analysis, defense, etc.). In particular, recent advances in the development of new advanced materials for gas sensing, with different chemical compositions (metals, metal oxides, polymers, composites, graphene, etc.), or with different dimensions (nano, micro, macro scale) and morphologies (particles, pores, wires, tubes, auctions, etc.) will be presented. Moreover, topics will be devoted on the characterization of these materials and their sensing properties and on the designing and implementing new gas sensing devices for emerging applications.

Dr. Iole Venditti
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

  • inorganic materials
  • organic materials
  • metal oxides
  • carbon nanotubes
  • grapheme
  • composite materials
  • nanostructured materials
  • sol-gel
  • electrochemical synthesis
  • optical sensors
  • electrochemical sensors
  • medical diagnostics
  • environmental monitoring
  • gas sensing devices

Published Papers (2 papers)

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Research

11 pages, 3002 KiB  
Article
Use of Gold Nanoparticles as Substrate for Diffusive Monitoring of Gaseous Mercury
by Paolo Papa, Ilaria Fratoddi, Iole Venditti, Francesca Vichi, Antonella Macagnano, Emiliano Zampetti and Andrea Bearzotti
Materials 2018, 11(11), 2119; https://doi.org/10.3390/ma11112119 - 28 Oct 2018
Cited by 4 | Viewed by 2325
Abstract
In the present work, the study and the performances of an adsorbent material for gaseous mercury employed in different diffusive bodies geometries is presented. The material is based on gold nanoparticles (AuNPs) deposited on quartz fibres filters, suitable for bonding the gaseous mercury [...] Read more.
In the present work, the study and the performances of an adsorbent material for gaseous mercury employed in different diffusive bodies geometries is presented. The material is based on gold nanoparticles (AuNPs) deposited on quartz fibres filters, suitable for bonding the gaseous mercury through an amalgamation process. Following thermal desorption and analysis, the behavior of different diffusive samplers prototypes was compared. Both indoor and outdoor exposures were carried out in order to evaluate the advantages and shortcomings of the geometries in study at different sites. From the outdoor long-term exposures, a constant uptake rate (Ur), with a low influence coming from the environmental conditions, was observed for the axial geometry, reporting a high coefficient of determination (R2 0.97). Indoor exposures showed a higher reproducibility, along with a higher coefficient of determination (R2 0.99). The presented results allowed us to observe different behaviors coming from two kinds of diffusive samplers designs, showing different adsorption rates and data dispersion. This allowed us to focalize our attention on the most suitable design from these two tested prototypes, for this kind of adsorbent material. Full article
(This article belongs to the Special Issue Gas Sensitive Materials and Devices)
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13 pages, 2391 KiB  
Article
Polystyrene Opals Responsive to Methanol Vapors
by Luca Burratti, Mauro Casalboni, Fabio De Matteis, Roberto Pizzoferrato and Paolo Prosposito
Materials 2018, 11(9), 1547; https://doi.org/10.3390/ma11091547 - 28 Aug 2018
Cited by 14 | Viewed by 3359
Abstract
Photonic crystals (PCs) show reflectance spectra depending on the geometrical structure of the crystal, the refractive index (neff), and the light incident angle, according to the Bragg-Snell law. Three-dimensional photonic crystals (3D-PCs) composed of polymeric sub-micrometer spheres, are arranged in [...] Read more.
Photonic crystals (PCs) show reflectance spectra depending on the geometrical structure of the crystal, the refractive index (neff), and the light incident angle, according to the Bragg-Snell law. Three-dimensional photonic crystals (3D-PCs) composed of polymeric sub-micrometer spheres, are arranged in an ordered face cubic centered (fcc) lattice and are good candidates for vapor sensing by exploiting changes of the reflectance spectra. We synthesized high quality polystyrene (PS) 3D-PCs, commonly called opals, with a filling factor f near to the ideal value of 0.74 and tested their optical response in the presence of different concentrations of methanol (MeOH) vapor. When methanol was present in the voids of the photonic crystals, the reflectance spectra experienced energy shifts. The concentration of methyl alcohol vapor can be inferred, due to a linear dependence of the reflectance band maximum wavelength as a function of the vapor concentration. We tested the reversibility of the process and the time stability of the system. A limit of detection (LOD) equal to 5% (v/v0), where v was the volume of methanol and v0 was the total volume of the solution (methanol and water), was estimated. A model related to capillary condensation for intermediate and high methanol concentrations was discussed. Moreover, a swelling process of the PS spheres was invoked to fully understand the unexpected energy shift found for very high methanol content. Full article
(This article belongs to the Special Issue Gas Sensitive Materials and Devices)
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