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Chemosensors
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Nanomaterials in Chemosensors and Biosensors: Development and Application
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Nanomaterials in Chemosensors and Biosensors: Development and Application

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

Deadline for manuscript submissions: 31 October 2024 | Viewed by 7687

Special Issue Editor

Dr. Marko Spasenovic

E-Mail Website
Guest Editor
Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
Interests: graphene; sensors; photonics; material science
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The emergence of engineered nanomaterials has opened doors to novel applications in numerous fields, including healthcare, engineering, manufacturing, aerospace, construction, automotive and others. The large surface-to-volume ratio of nanomaterials is well-suited to targeted functionalization as well as sensing. Chemosensors’ and biosensors’ specificity and sensitivity can be tailored via changes in the engineering nanomaterial shape, size, composition and surface chemistry. Nanomaterial biosensors have applications in healthcare diagnostics, food freshness and bioprocessing, among other areas. Materials falling under this category, including metal, metal oxides, carbon nanotubes, 2D materials, polymers, proteins or nanocomposites, can have a varied composition. Chemosensors can be used to detect gases and liquids for applications in environmental protection, industrial automation and safety. This Special Issue covers all aspects of such materials, ranging from theoretical considerations explaining the working principles of materials to their synthesis, characterization and application.

Dr. Marko Spasenovic
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. 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

  • nanomaterials
  • chemosensors
  • biosensors
  • nanotechnology
  • biotechnology

Published Papers (5 papers)

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Research

20 pages, 3645 KiB  
Article
Investigating the Metallic Nanoparticles Decoration on Reduced Graphene Oxide-Based Sensors Used to Detect Sulfur Dioxide
by Elisa Ruiz, Christelle Varenne, Bruno S. De Lima, Thiaka Gueye, Alain Pauly, Jérôme Brunet, Valmor R. Mastelaro and Amadou L. Ndiaye
Chemosensors 2024, 12(2), 24; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors12020024 - 08 Feb 2024
Cited by 1 | Viewed by 1085
Abstract
This paper presents the impact of the decoration of reduced graphene oxide (rGO) with metallic nanoparticles to detect sulfur dioxide (SO2). Copper and platinum were employed to produce metal nanoparticles (NPs) for the chemical and physical decoration of rGO to form [...] Read more.
This paper presents the impact of the decoration of reduced graphene oxide (rGO) with metallic nanoparticles to detect sulfur dioxide (SO2). Copper and platinum were employed to produce metal nanoparticles (NPs) for the chemical and physical decoration of rGO to form the nanocomposites (rGO/NPs). We optimized NP loading by varying the concentrations of metal ions and deposition times for chemical and physical decoration, respectively. The chemical decoration presents a random nanoparticle distribution on the rGO surface with a broad particle size distribution (1 to 100 nm with a majority less than 40 nm). In comparison, the physical decoration presents uniformly distributed nanoparticles with particles of a size between 1 and 20 nm, with a majority less than 10 nm. The chemically decorated structures present the best gas responses and show that lower NP loading provides better responses. The nanocomposites present responses owing to a better synergy between NPs and the rGO surface, combined with the catalytic action of the NPs on the rGO. The physical decoration allows higher NP surface coverage than the chemical one but implies a lower remaining rGO naked surface for gaseous molecule interaction. These results illustrate that the NPs’ surface and the uncovered rGO contribute to the gas response. Full article
(This article belongs to the Special Issue Nanomaterials in Chemosensors and Biosensors: Development and Application)
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17 pages, 5937 KiB  
Article
Contamination- and Perturbation-Free Fluorescent Monitoring of Zn2+ in Suspensions Using Crown Ether-Functionalized Magnetic Nanoparticles
by Panna Vezse, Ádám Golcs, Tünde Tóth and Péter Huszthy
Chemosensors 2023, 11(10), 547; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors11100547 - 22 Oct 2023
Viewed by 1500
Abstract
This study aims to introduce a fluorescence-based chemosensing method for Zn2+ in aqueous suspensions and untreated surface waters, conditions which generally hinder the application of conventional optochemical sensing platforms. A macrocyclic fluoroionophore was covalently bonded to a silica-coated magnetic nanoparticle and applied [...] Read more.
This study aims to introduce a fluorescence-based chemosensing method for Zn2+ in aqueous suspensions and untreated surface waters, conditions which generally hinder the application of conventional optochemical sensing platforms. A macrocyclic fluoroionophore was covalently bonded to a silica-coated magnetic nanoparticle and applied according to a predetermined protocol for analyzing trace amounts of Zn2+ under rarely investigated conditions. Utilizing the reversible complexation of the immobilized fluoroionophore, rapid regeneration was carried out via simple acidification after the magnetic-assisted solid-phase extraction of the particles. Forming inclusion complexes with Zn2+ with the receptor units of the particles leads to a significant enhancement in fluorescence intensity at 370 nm, above the detection limit of 5 ppb, with a dynamic linear range of quantification of 15–3000 ppb in a pH range of 5.5–7.5. Practical applicability was confirmed by analyzing untreated river water and an aqueous suspension of pumpkin seed flour as real and relevant heterogeneous multicomponent samples of predetermined sample composition and natural Zn2+ content. Our practical approach aims to broaden the applicability range of optochemical sensing platforms for Zn2+. Full article
(This article belongs to the Special Issue Nanomaterials in Chemosensors and Biosensors: Development and Application)
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19 pages, 3502 KiB  
Article
Gas-Sensing Properties of Graphene Functionalized with Ternary Cu-Mn Oxides for E-Nose Applications
by Margus Kodu, Rainer Pärna, Tea Avarmaa, Indrek Renge, Jekaterina Kozlova, Tauno Kahro and Raivo Jaaniso
Chemosensors 2023, 11(8), 460; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors11080460 - 15 Aug 2023
Viewed by 1011
Abstract
Chemiresistive gas sensors were produced by functionalizing graphene with a ~3 nm layer of mixed oxide xCu2O⸱yMnO using pulsed laser deposition (PLD) from a hopcalite CuMn2O4 target. Sensor response time traces were recorded for strongly [...] Read more.
Chemiresistive gas sensors were produced by functionalizing graphene with a ~3 nm layer of mixed oxide xCu2O⸱yMnO using pulsed laser deposition (PLD) from a hopcalite CuMn2O4 target. Sensor response time traces were recorded for strongly oxidizing (NO2, O3) and reducing (NH3, H2S) poisonous gases at ppb and ppm levels, respectively. The morphology of the MOX layer was modified by growth temperature during PLD, resulting in the optimization of the sensor response. Differences in decomposition or oxidation rates on catalytically active metal oxide (MOX) were utilized to achieve partial selectivity for pairs of gases that have similar adsorption and redox properties. The predominant selectivity towards ozone in most samples at different measuring conditions remained difficult to suppress. A distinct selectivity for H2S emerged at higher measurement temperatures (100–150 °C), which was assigned to catalytic oxidation with O2. Several gas–MOX interaction mechanisms were advanced to tentatively explain the sensor behavior, including reversible electron transfer in the simplest case of NO2, decomposition via ionic transients for O3, and complex catalytic oxidative transformations for NH3 and H2S. Full article
(This article belongs to the Special Issue Nanomaterials in Chemosensors and Biosensors: Development and Application)
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13 pages, 3266 KiB  
Article
Hydrogel-Based Electrodeposition of Copper Nanoparticles for Selective Detection for Hydrogen Peroxide
by Jihun Han, Jihyeon Kim, Byung-Kwon Kim and Kyungsoon Park
Chemosensors 2023, 11(7), 384; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors11070384 - 09 Jul 2023
Cited by 4 | Viewed by 1620
Abstract
A copper-modified indium tin oxide (ITO) electrode was utilized as an electrocatalytic sensing platform for hydrogen peroxide (H2O2) detection. In this study, instead of conventional solution-phase electrodeposition, electrochemical deposition was used to deposit Cu on an ITO electrode with [...] Read more.
A copper-modified indium tin oxide (ITO) electrode was utilized as an electrocatalytic sensing platform for hydrogen peroxide (H2O2) detection. In this study, instead of conventional solution-phase electrodeposition, electrochemical deposition was used to deposit Cu on an ITO electrode with agarose hydrogel. The hydrogel-based Cu nanoparticles exhibited a more evenly dispersed distribution compared to those in the solution phase. Additionally, by incorporating agarose hydrogel as a solid electrolyte, the overall active surface area of Cu nanoparticles on the electrode surface was increased, mainly resulting from a decrease in the aggregation of Cu nanoparticles. Cyclic voltammetry and chronoamperometry confirmed that the resulting Cu nanoparticles possessed distinct electrocatalytic activity for H2O2 reduction and good selectivity for various interfering substances. The chronocoulometry response of the fabricated sensor obtained at −0.6 V (vs. Ag/AgCl) increased linearly with a dynamic range of 1–500 μM, and the limit of detection for H2O2 was 1.73 μM. Our research provides new possibilities for the electrochemical synthesis of metal nanoparticles for non-enzymatic sensing applications. Full article
(This article belongs to the Special Issue Nanomaterials in Chemosensors and Biosensors: Development and Application)
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Graphical abstract

14 pages, 3263 KiB  
Article
Self-Powered Wearable Breath-Monitoring Sensor Enabled by Electromagnetic Harvesting Based on Nano-Structured Electrochemically Active Aluminum
by Marko V. Bošković, Miloš Frantlović, Evgenija Milinković, Predrag D. Poljak, Dana Vasiljević Radović, Jelena N. Stevanović and Milija Sarajlić
Chemosensors 2023, 11(1), 51; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors11010051 - 07 Jan 2023
Cited by 6 | Viewed by 1889
Abstract
Self-powered sensors are gaining a lot of attention in recent years due to their possible application in the Internet of Things, medical implants and wireless and wearable devices. Human breath detection has applications in diagnostics, medical therapy and metabolism monitoring. One possible approach [...] Read more.
Self-powered sensors are gaining a lot of attention in recent years due to their possible application in the Internet of Things, medical implants and wireless and wearable devices. Human breath detection has applications in diagnostics, medical therapy and metabolism monitoring. One possible approach for breath monitoring is detecting the humidity in exhaled air. Here, we present an extremely sensitive, self-powered sensor for breath humidity monitoring. As a power source, the sensor uses electromagnetic energy harvested from the environment. Even electromagnetic energy harvested from the human body is enough for the operation of this sensor. The signal obtained using the human body as a source was up to 100 mV with an estimated power of 1 nW. The relatively low amount of energy that could be harvested in this way was producing a signal that was modulated by an interdigitated capacitor made out of electrochemically activated aluminum. The signal obtained in this way was rectified by a set of Schottky diodes and measured by a voltmeter. The sensor was capable of following a variety of different respiration patterns during normal breathing, exercise and rest, at the same time powered only by electromagnetic energy harvested from the human body. Everything happened in the normal environment used for everyday work and life, without any additional sources, and at a safe level of electromagnetic radiation. Full article
(This article belongs to the Special Issue Nanomaterials in Chemosensors and Biosensors: Development and Application)
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