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Chemosensors
Special Issues
Developments on Supramolecular Thin Films to Sensing Applications
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Developments on Supramolecular Thin Films to Sensing Applications

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Materials for Chemical Sensing".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 8984

Special Issue Editors

Dr. Priscila Aléssio

E-Mail Website
Guest Editor
Faculdade de Ciências e Tecnologia (FCT), Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Presidente Prudente, SP, Brazil
Interests: nanotechnology; thin films; sensors
Dr. Maria Braunger

E-Mail Website
Guest Editor
Departamento de Física, Universidade Estadual Paulista Júlio de Mesquita Filho, Presidente Prudente, SP, Brazil
Interests: thin films; sensors; supramolecular structures; electronic tongue; electronic nose
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of Chemosensors will include a published collection of manuscripts describing the latest advances in the development of thin films for sensing applications. Both original research papers and review articles highlighting contributions from researchers and scientists working in the field of sensing development will be included.

Submissions should specifically consider active layers of sensors based on thin films. Topics of interest include, but are not limited to, the following topics:

  • Chemical sensors;
  • Electronic tongue;
  • Electronic nose;
  • Multifunctional materials;
  • Biosensors;
  • Wearable devices;
  • Optical sensors;
  • Hybrid devices;
  • Colorimetric sensors;
  • Printed sensors.

Dr. Priscila Aléssio
Dr. Maria Braunger
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. Chemosensors 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 2700 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

  • thin films
  • sensors
  • biosensors
  • supramolecular structures
  • electronic tongue
  • electronic nose

Published Papers (5 papers)

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Research

Jump to: Review, Other

16 pages, 4733 KiB  
Article
Investigation of the Synergistic Effect of Layer-by-Layer Films of Carbon Nanotubes and Polypyrrole on a Flexible Electrochemical Device for Paraquat Sensing
by Stefanny F. Amaro, Cristiane C. Maciel, Jéssica S. Rodrigues, Amanda de S. M. de Freitas, Lucas V. B. V. Fré, Anerise de Barros and Marystela Ferreira
Chemosensors 2023, 11(8), 420; https://doi.org/10.3390/chemosensors11080420 - 26 Jul 2023
Viewed by 942
Abstract
This research aims to study flexible sensors based on a poly(butylene adipate-co-terephthalate) (PBAT) biodegradable polymer and graphite. Sensors were modified through the layer-by-layer (LbL) technique to improve their electrochemical behavior for paraquat (PQ) detection. Nanostructured films were obtained by alternating layers of anionic [...] Read more.
This research aims to study flexible sensors based on a poly(butylene adipate-co-terephthalate) (PBAT) biodegradable polymer and graphite. Sensors were modified through the layer-by-layer (LbL) technique to improve their electrochemical behavior for paraquat (PQ) detection. Nanostructured films were obtained by alternating layers of anionic and cationic materials, carbon nanotubes (CNTs), and polypyrrole (PPY), respectively. The devices, with and without modification, were characterized by contact angle, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). Electrochemical characterization was labeled via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). PQ molecules were detected using the differential pulse voltammetry (DPV) technique in a concentration range of 0.1 to 2.1 µM. The sensor detection limit (LOD) was obtained using the analytical curve, with it being equal to 0.073 µM. The LbL film gPBAT(PPY/CNT)n sensor showed good stability, reproducibility, and repeatability, with recovery values ranging from 99.4% to 109.3% for PQ when the analyzed samples were contaminated with tap water. The produced electrodes have the advantage of being flexible, disposable, reproducible, and of low manufacturing cost, which makes them attractive for portable environmental analysis. Full article
(This article belongs to the Special Issue Developments on Supramolecular Thin Films to Sensing Applications)
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17 pages, 3817 KiB  
Article
Combining Impedance Spectroscopy and Information Visualization Methods to Optimize the Detection of Carbendazim Using Layer-by-Layer Films
by Leonardo Negri Furini, José Diego Fernandes, Douglas Henrique Vieira, Luis Fernando do Carmo Morato, Neri Alves and Carlos José Leopoldo Constantino
Chemosensors 2023, 11(4), 213; https://doi.org/10.3390/chemosensors11040213 - 29 Mar 2023
Cited by 1 | Viewed by 1205
Abstract
Usually, electronic tongues (e-tongue) do not require specific interactions to discriminate aqueous solutions. Among the several factors which determine the electrical properties of sensing units, the interactions between liquids and interfaces have a crucial role. Here, we explore the interaction between dioctadecyldimethylammonium bromide [...] Read more.
Usually, electronic tongues (e-tongue) do not require specific interactions to discriminate aqueous solutions. Among the several factors which determine the electrical properties of sensing units, the interactions between liquids and interfaces have a crucial role. Here, we explore the interaction between dioctadecyldimethylammonium bromide (DODAB) lipid and carbendazim (MBC) pesticide in an e-tongue to discriminate different MBC concentrations in aqueous solutions. The sensing units were fabricated of gold interdigitated electrodes (IDEs) coated with layer-by-layer (LbL) films of DODAB and nickel tetrasulfonated phthalocyanine (NiTsPc), perylene and 1,2-dipalmitoyl-sn-glycero-3-phospho-(1′-rac-glycerol) (DPPG), namely (DODAB/NiTsPc)5 and (Perylene/DPPG)5, respectively. Besides, a bare electrode also constituted the e-tongue to distinguish MBC concentrations from 1.0 × 10−7 up to 1.0 × 10−10 mol L−1, by impedance spectroscopy. In addition, the experiment was optimized using two IDE geometries. The LbL films were manually fabricated obtaining linear growth monitored via UV-Vis absorption spectroscopy. Optical images associated with chemical mapping reveals the presence of small aggregates in the DODAB/NiTsPc LbL film surface. Although the e-tongue was able to discriminate all MBC concentrations by means of the interactive document map (IDMAP), only the sensing unit covered with DODAB/NiTsPc LbL film presented a satisfactory response. According to the equivalent circuit, the main contribution arises from the bulk and film surface due to the interaction between DODAB and MBC, indicating THE sensitivity of the sensing unit. Finally, the adsorption of MBC molecules onto the film surface induced an irreversible process, although there are some frequencies at which the sensing unit response seems to be reversible, as shown by parallel coordinates. Full article
(This article belongs to the Special Issue Developments on Supramolecular Thin Films to Sensing Applications)
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15 pages, 2763 KiB  
Article
Comparative Studies of Undoped/Al-Doped/In-Doped ZnO Transparent Conducting Oxide Thin Films in Optoelectronic Applications
by Panagiota Koralli, Songül Fiat Varol, George Mousdis, Dionysios E. Mouzakis, Ziya Merdan and Michael Kompitsas
Chemosensors 2022, 10(5), 162; https://doi.org/10.3390/chemosensors10050162 - 28 Apr 2022
Cited by 11 | Viewed by 2745
Abstract
In this paper, undoped, Al-, and In-doped zinc oxide thin films were deposited. Film growth was performed using the sol–gel technique. The method included (a) preparing homogeneous and stable solutions of zinc acetate 2-hydrate, (b) mixing them with aluminum nitrate and indium acetate [...] Read more.
In this paper, undoped, Al-, and In-doped zinc oxide thin films were deposited. Film growth was performed using the sol–gel technique. The method included (a) preparing homogeneous and stable solutions of zinc acetate 2-hydrate, (b) mixing them with aluminum nitrate and indium acetate in 2-methoxyethanol and 2-aminoethanol solutions with various concentrations, and (c) spin coating them onto transparent glass substrates. After thermal annealing, the films showed a high transparency (80–90%) and good stability. Using typical diagnostic tools, the structural, morphological, optical, and electrical film properties were investigated and linked to the dopant type, and concentrations in view of optoelectronics were investigated. Full article
(This article belongs to the Special Issue Developments on Supramolecular Thin Films to Sensing Applications)
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Review

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48 pages, 11120 KiB  
Review
Exploring Deposition Techniques and Supramolecular Arrangement in Thin Films for Sensor Applications
by Celina M. Miyazaki, Cibely S. Martin, Maíza S. Ozório, Henry S. Kavazoi, Carlos J. L. Constantino and Priscila Aléssio
Chemosensors 2023, 11(10), 524; https://doi.org/10.3390/chemosensors11100524 - 5 Oct 2023
Viewed by 1924
Abstract
In recent decades, many research efforts have been dedicated to finding highly sensitive devices for fast and reliable identification and quantification of an expanding range of analytes. As a result, there has been an increased number of publications dedicated to this area and [...] Read more.
In recent decades, many research efforts have been dedicated to finding highly sensitive devices for fast and reliable identification and quantification of an expanding range of analytes. As a result, there has been an increased number of publications dedicated to this area and a consequent increase in the number of review papers on the subject. However, unlike most review articles, we chose to explore the impact of supramolecular arrangement (or deeper, when possible, approaching the molecular organization) and assembly variables on sensing performance. This review briefly discusses the methods used to determine the molecular organization of thin films. We also examine various deposition techniques, including Langmuir-Blodgett, Langmuir-Schaefer, Layer-by-Layer assembly, electrodeposition, and spray pyrolysis, describing mainly (but not limited to) the advances in the last five years in developing thin films for sensors, with a particular emphasis on how the supramolecular arrangement can influence the sensing properties of these films. Full article
(This article belongs to the Special Issue Developments on Supramolecular Thin Films to Sensing Applications)
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Other

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19 pages, 2815 KiB  
Perspective
Disease Diagnosis with Chemosensing, Artificial Intelligence, and Prospective Contributions of Nanoarchitectonics
by Xuechen Shen and Katsuhiko Ariga
Chemosensors 2023, 11(10), 528; https://doi.org/10.3390/chemosensors11100528 - 7 Oct 2023
Cited by 2 | Viewed by 1401
Abstract
In modern materials research, nanotechnology will play a game-changing role, with nanoarchitectonics as an overarching integrator of the field and artificial intelligence hastening its progress as a super-accelerator. We would like to discuss how this schema can be utilized in the context of [...] Read more.
In modern materials research, nanotechnology will play a game-changing role, with nanoarchitectonics as an overarching integrator of the field and artificial intelligence hastening its progress as a super-accelerator. We would like to discuss how this schema can be utilized in the context of specific applications, with exemplification using disease diagnosis. In this paper, we focus on early, noninvasive disease diagnosis as a target application. In particular, recent trends in chemosensing in the detection of cancer and Parkinson’s disease are reviewed. The concept has been gaining traction as dynamic volatile metabolite profiles have been increasingly associated with disease onset, making them promising diagnostic tools in early stages of disease. We also discuss advances in nanoarchitectonic chemosensors, which are theoretically ideal form factors for diagnostic chemosensing devices. Last but not least, we shine the spotlight on the rise to prominence and emergent contributions of artificial intelligence (AI) in recent works, which have elucidated a strong synergy between chemosensing and AI. The powerful combination of nanoarchitectonic chemosensors and AI could challenge our current notions of disease diagnosis. Disease diagnosis and detection of emerging viruses are important challenges facing society. The parallel development of advanced functional materials for sensing is necessary to support and enable AI methodologies in making technological leaps in applications. The material and structural formative technologies of nanoarchitectonics are critical in meeting these challenges. Full article
(This article belongs to the Special Issue Developments on Supramolecular Thin Films to Sensing Applications)
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