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Supramolecular Chemistry for Sensors Application
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Supramolecular Chemistry for Sensors Application

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (30 July 2018) | Viewed by 13295

Special Issue Editors

Prof. Dr. Ludovico Valli

E-Mail Website
Guest Editor
Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Monteroni, I-73100 Lecce, Italy
Interests: immobilization of different materials by humid techniques; characterization by spectroscopic techniques; applications of the deposited active layers in photo-induced phenomena (charge and/or energy transfer); chemical sensors; drug delivery through nanoassemblies and nanoparticles
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,

Sensors and (bio)sensors scientific research is under continuous development. The supramolecular approach to design innovative and nanostructured active layers for the selective and sensitive recognition of specific target molecules or ions is very challenging and versatile. Such an approach includes all techniques useful to develop active layers for sensors and biosensors as an alternative to organic chemistry, and stretches from the immobilization of organic thin film on solid supports by means of humid techniques, such as Langmuir Blodgett, Langmuir Schaefer, layer-by-layer, dip coating, self-assembled monolayer, to the synthesis and decoration of micro-nanocolloids of different compositions by exploiting supramolecular interactions. Basically, the versatility of the approaches is guaranteeing the possibility of pointing out procedures for the detection of analytes inside complex matrices, such as bio-marker in biological fluids, bio-compounds related to the freshness of food, microorganisms or their parts, heavy metal ions, pesticides, and so on. In this context, we would like to invite you to consider submitting a manuscript to our upcoming Special Issue, “Supramolecular Chemistry for Sensors Application”, to be published at the end of July 2018. Submissions from different scientific areas for the development of sensors and biosensors, with supramolecular chemistry approaches for the sensing of different classes of compounds, in vapor or liquid phases, will be welcome.

Both research papers and review articles will be considered. If you are interested in contributing to this Special Issue, we would very much appreciate receiving the tentative title of your contribution.

Dr. Ludovico Valli
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. Sensors 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

  • biosensors
  • organic thin layers
  • colloids and nanocolloids
  • optical sensors
  • electrochimical sensors
  • impedentiometry
  • gravymetry
  • surface plasmon resonance
  • self-assembly techniques for active layer immobilization
  • vibrational and electronic spectroscopy
  • surface enhanced Raman scattering
  • lab-on-chip

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Published Papers (3 papers)

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Research

11 pages, 2683 KiB  
Article
An Advanced, Silicon-Based Substrate for Sensitive Nucleic Acids Detection
by Salvatore Petralia, Nunzio Vicario, Giovanna Calabrese, Rosalba Parenti and Sabrina Conoci
Sensors 2018, 18(9), 3138; https://doi.org/10.3390/s18093138 - 17 Sep 2018
Cited by 6 | Viewed by 3150
Abstract
Surface substrate and chemical functionalization are crucial aspects for the fabrication of the sensitive biosensor based on microarray technology. In this paper, an advanced, silicon-based substrate (A-MA) allowing enhancement of optical signal for microarray application is described. The substrate consists in a multilayer [...] Read more.
Surface substrate and chemical functionalization are crucial aspects for the fabrication of the sensitive biosensor based on microarray technology. In this paper, an advanced, silicon-based substrate (A-MA) allowing enhancement of optical signal for microarray application is described. The substrate consists in a multilayer of Si/Al/SiO2 layers. The optical signal enhancement is reached by a combination of the mirror effect of Al film and the SiO2 thickness around 830 nm, which is able to reach the maximum of interference for the emission wavelength of the Cy5 fluorescent label. Moreover, SiO2 layer is suitable for the immobilization of single-strand DNA through standard silane chemistry, and probe densities of about 2000 F/um2 are reached. The microarray is investigated in the detection of HBV (Hepatitis B Virus) pathogen with analytical samples, resulting in a dynamic linear range of 0.05–0.5 nM, a sensitivity of about 18000 a.u. nM−1, and a Limit of Detection in the range of 0.031–0.043 Nm as a function of the capture probe sequence. Full article
(This article belongs to the Special Issue Supramolecular Chemistry for Sensors Application)
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12 pages, 3212 KiB  
Article
Discrimination of Milks with a Multisensor System Based on Layer-by-Layer Films
by Coral Salvo-Comino, Celia García-Hernández, Cristina García-Cabezón and Maria Luz Rodríguez-Méndez
Sensors 2018, 18(8), 2716; https://doi.org/10.3390/s18082716 - 18 Aug 2018
Cited by 20 | Viewed by 4778
Abstract
A nanostructured electrochemical bi-sensor system for the analysis of milks has been developed using the layer-by-layer technique. The non-enzymatic sensor [CHI+IL/CuPcS]2, is a layered material containing a negative film of the anionic sulfonated copper phthalocyanine (CuPcS) acting [...] Read more.
A nanostructured electrochemical bi-sensor system for the analysis of milks has been developed using the layer-by-layer technique. The non-enzymatic sensor [CHI+IL/CuPcS]2, is a layered material containing a negative film of the anionic sulfonated copper phthalocyanine (CuPcS) acting as electrocatalytic material, and a cationic layer containing a mixture of an ionic liquid (IL) (1-butyl-3-methylimidazolium tetrafluoroborate) that enhances the conductivity, and chitosan (CHI), that facilitates the enzyme immobilization. The biosensor ([CHI+IL/CuPcS]2-GAO) results from the immobilization of galactose oxidase on the top of the LbL layers. FTIR, UV–vis, and AFM have confirmed the proposed structure and cyclic voltammetry has demonstrated the amplification caused by the combination of materials in the film. Sensors have been combined to form an electronic tongue for milk analysis. Principal component analysis has revealed the ability of the sensor system to discriminate between milk samples with different lactose content. Using a PLS-1 calibration models, correlations have been found between the voltammetric signals and chemical parameters measured by classical methods. PLS-1 models provide excellent correlations with lactose content. Additional information about other components, such as fats, proteins, and acidity, can also be obtained. The method developed is simple, and the short response time permits its use in assaying milk samples online. Full article
(This article belongs to the Special Issue Supramolecular Chemistry for Sensors Application)
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13 pages, 3512 KiB  
Article
Fluorinated Metal Phthalocyanines: Interplay between Fluorination Degree, Films Orientation, and Ammonia Sensing Properties
by Darya Klyamer, Aleksandr Sukhikh, Sergey Gromilov, Pavel Krasnov and Tamara Basova
Sensors 2018, 18(7), 2141; https://doi.org/10.3390/s18072141 - 3 Jul 2018
Cited by 54 | Viewed by 4539
Abstract
In this work, the sensor response of MPcFx (M = Cu, Co, Zn; x = 0, 4, 16) films toward gaseous NH3 (10–50 ppm) was studied by a chemiresistive method and compared to that of unsubstituted MPc films to reveal the [...] Read more.
In this work, the sensor response of MPcFx (M = Cu, Co, Zn; x = 0, 4, 16) films toward gaseous NH3 (10–50 ppm) was studied by a chemiresistive method and compared to that of unsubstituted MPc films to reveal the effects of central metals and F-substituents on the sensing properties. A combination of atomic force microscopy and X-ray diffraction techniques have been used to elucidate the structural features of thin MPcFx films deposited by organic molecular beam deposition. It has been shown that the sensor response of MPcF4 films to ammonia is noticeably higher than that of MPc films, which is in good correlation with the values of binding energy between the metal phthalocyanine and NH3 molecules, as calculated by the density functional theory (DFT) method. At the same time, in contrast to the DFT calculations, MPcF16 demonstrated the lesser sensor response compared with MPcF4, which appeared to be connected with the different structure and morphology of their films. The ZnPcF4 films were shown to exhibit a sensitivity to ammonia up to concentrations as low as 0.1 ppm, and can be used for the selective detection of ammonia in the presence of some reducing gases and volatile organic compounds. Moreover, the ZnPcF4 films can be used for the detection of NH3 in the gas mixture simulating exhaled air (N2 76%, O2 16%, H2O 5%, and CO2 3%). Full article
(This article belongs to the Special Issue Supramolecular Chemistry for Sensors Application)
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