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Chemosensors
Special Issues
Nanomaterials Synthesis for Both Sensors and Environmental Applications
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Nanomaterials Synthesis for Both Sensors and Environmental Applications

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Applied Chemical Sensors".

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 27450

Special Issue Editor

Dr. Sherif Moussa

E-Mail Website
Guest Editor
Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA
Interests: nanofabrication; nanomaterials synthesis and applications; catalysis; environmental applications; energy application
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

The synthesis of novel nanomaterials and nanodevices for both sensors and environmental applications is of immense importance. Nanomaterials provide unique electronic, magnetic, and chemical properties making them novel and attractive for the new generation of devices. For example, graphene-based nanocomposites and nano-oxides can be used efficiently for the removal of arsenic ions from contaminated water supplies, which in turn can save lives and lower the capital cost for the purification of water in highly arsenic-contaminated areas. The topics covered in this Special Issue will represent recent innovations in nanomaterials synthesis and characterization for use in both sensors and environmental applications. The removal of toxic containments from water, the catalytic oxidation of toxic gases such as carbon monoxide, as well as the synthesis and characterization of nanomaterials for biosensing applications are some of the topics that will be covered in this Special Issue. Both review and original research articles are welcomed from a broad spectrum of disciplines such as physics, chemistry, biochemistry, medicine, analytical science, environmental science, materials science, and engineering to highlight the latest developments and future challenges in this exciting filed of nanomaterials synthesis and characterization.

Dr. Sherif Moussa
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 synthesis and characterization
  • graphene-based nanocomposites for electronic applications
  • nanomaterials for biosensors use and applications
  • nano-oxides for CO catalytic oxidation and other catalytic applications
  • graphene-based nanomaterials for environmental applications
  • nanomaterials use for sensors applications

Related Special Issue

Published Papers (5 papers)

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Research

Jump to: Review

13 pages, 2126 KiB  
Article
Effect of Applied Electrical Stimuli to Interdigitated Electrode Sensors While Detecting 17α-Ethinylestradiol in Water Samples
by Paulo M. Zagalo, Paulo A. Ribeiro and Maria Raposo
Chemosensors 2022, 10(3), 114; https://doi.org/10.3390/chemosensors10030114 - 16 Mar 2022
Cited by 5 | Viewed by 2001
Abstract
The effect of impedance measurements of applied voltage on the detection of 17α-ethinylestradiol (EE2) in water samples using interdigitated electrodes (IDE) coated or not with thin films, is described. Firstly, the effect of immersion in EE2 aqueous solutions of layer-by-layer films prepared with [...] Read more.
The effect of impedance measurements of applied voltage on the detection of 17α-ethinylestradiol (EE2) in water samples using interdigitated electrodes (IDE) coated or not with thin films, is described. Firstly, the effect of immersion in EE2 aqueous solutions of layer-by-layer films prepared with poly(allylamine hydrochloride) (PAH), graphene oxide (GO), poly(1-(4-(3-carboxy-4-hydroxyphenylazo) benzene sulfonamido) 1,2 ethanediyl, sodium salt) (PAZO), polyethylenimine (PEI) and poly(sodium 4-styrenesulfonate) (PSS) was analyzed. These results demonstrated that PAH/GO films desorb during the immersion on EE2 solutions, while EE2 adsorbs on PAH/PAZO and PEI/PSS films with characteristic time values of 16.7 and 7.1 min, respectively, demonstrating that both films are adequate for the development of EE2 sensors. However, as the adsorption characteristic time is shorter, and the EE2 adsorbed amount is smaller, the PEI/PSS films are more suitable for the development of sensors. The effect of the applied voltage was analyzed using both IDEs covered with PEI/PSS films as well as those uncoated. The capacitance spectra are best fitted to analyze this effect, and the loss tangent spectra are advantageous to analyze the aqueous media. Furthermore, it was concluded that lower voltage values are best suited to perform measurements of this nature, given that higher voltages lead to less reliable results and cause irreparable damage to the sensors. Full article
(This article belongs to the Special Issue Nanomaterials Synthesis for Both Sensors and Environmental Applications)
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13 pages, 2114 KiB  
Article
Identification of Chiral-Specific Carbon Nanotube Binding Peptides Using a Modified Biopanning Method
by Rachel Krabacher, Steve Kim, Yen Ngo, Joseph Slocik, Christina Harsch and Rajesh Naik
Chemosensors 2021, 9(9), 245; https://doi.org/10.3390/chemosensors9090245 - 01 Sep 2021
Cited by 2 | Viewed by 1900
Abstract
Peptides can recognize and selectively bind to a wide variety of materials dependent on both their surface properties and the environment. Biopanning with phage or cell peptide display libraries can identify material-specific binding peptides. However, the limitations with sequence diversity of traditional bacteriophage [...] Read more.
Peptides can recognize and selectively bind to a wide variety of materials dependent on both their surface properties and the environment. Biopanning with phage or cell peptide display libraries can identify material-specific binding peptides. However, the limitations with sequence diversity of traditional bacteriophage (phage) display libraries and loss of unique phage clones during the amplification cycles results in a smaller pool of peptide sequences identified. False positive sequences tend to emerge during the biopanning process due to highly proliferating, yet nonspecific, phages. In order to overcome this limitation of traditional biopanning methodology, a modified method using high-throughput next generation sequencing (HTS) was tested to select for unique peptides specific to two types of single wall carbon nanotube (SWNTs) sources with varying diameter distribution and chirality. Here, the process, analysis, and characterization of peptide sequences identified using the modified method is further described and compared to a peptide identified in literature using the traditional method. Selected sequences from this study were incorporated in a SWNT dispersion experiment to probe their selectivity to the nanotube diameter. We show that NHTS can uncover unique binding sequences that might have otherwise been lost during the traditional biopanning method. Full article
(This article belongs to the Special Issue Nanomaterials Synthesis for Both Sensors and Environmental Applications)
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8 pages, 2446 KiB  
Communication
CH3SH and H2S Sensing Properties of V2O5/WO3/TiO2 Gas Sensor
by Takafumi Akamatsu, Toshio Itoh, Akihiro Tsuruta and Yoshitake Masuda
Chemosensors 2021, 9(5), 113; https://doi.org/10.3390/chemosensors9050113 - 19 May 2021
Cited by 13 | Viewed by 2885
Abstract
Resistive-type semiconductor-based gas sensors were fabricated for the detection of methyl mercaptan and hydrogen sulfide. To fabricate these sensors, V2O5/WO3/TiO2 (VWT) particles were deposited on interdigitated Pt electrodes. The vanadium oxide content of the utilized VWT [...] Read more.
Resistive-type semiconductor-based gas sensors were fabricated for the detection of methyl mercaptan and hydrogen sulfide. To fabricate these sensors, V2O5/WO3/TiO2 (VWT) particles were deposited on interdigitated Pt electrodes. The vanadium oxide content of the utilized VWT was 1.5, 3, or 10 wt.%. The structural properties of the VWT particles were investigated by X-ray diffraction and scanning electron microscopy analyses. The resistance of the VWT gas sensor decreased with increasing methyl mercaptan and hydrogen sulfide gas concentrations in the range of 50 to 500 ppb. The VWT gas sensor with 3 wt.% vanadium oxide showed high methyl mercaptan and hydrogen sulfide responses and good gas selectivity against hydrogen at 300 °C. Full article
(This article belongs to the Special Issue Nanomaterials Synthesis for Both Sensors and Environmental Applications)
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Review

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24 pages, 13701 KiB  
Review
The Photoluminescence and Biocompatibility of CuInS2-Based Ternary Quantum Dots and Their Biological Applications
by Rajendran Jose Varghese and Oluwatobi Samuel Oluwafemi
Chemosensors 2020, 8(4), 101; https://doi.org/10.3390/chemosensors8040101 - 15 Oct 2020
Cited by 10 | Viewed by 4268
Abstract
Semiconductor quantum dots (QDs) have become a unique class of materials with great potential for applications in biomedical and optoelectronic devices. However, conventional QDs contains toxic heavy metals such as Pb, Cd and Hg. Hence, it is imperative to find an alternative material [...] Read more.
Semiconductor quantum dots (QDs) have become a unique class of materials with great potential for applications in biomedical and optoelectronic devices. However, conventional QDs contains toxic heavy metals such as Pb, Cd and Hg. Hence, it is imperative to find an alternative material with similar optical properties and low cytotoxicity. Among these materials, CuInS2 (CIS) QDs have attracted a lot of interest due to their direct band gap in the infrared region, large optical absorption coefficient and low toxic composition. These factors make them a good material for biomedical application. This review starts with the origin and photophysical characteristics of CIS QDs. This is followed by various synthetic strategies, including synthesis in organic and aqueous solvents, and the tuning of their optical properties. Lastly, their significance in various biological applications is presented with their prospects in clinical applications. Full article
(This article belongs to the Special Issue Nanomaterials Synthesis for Both Sensors and Environmental Applications)
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35 pages, 9030 KiB  
Review
Review on Sensing Applications of Perovskite Nanomaterials
by Muthaiah Shellaiah and Kien Wen Sun
Chemosensors 2020, 8(3), 55; https://doi.org/10.3390/chemosensors8030055 - 14 Jul 2020
Cited by 107 | Viewed by 15075
Abstract
Recently, perovskite-based nanomaterials are utilized in diverse sustainable applications. Their unique structural characteristics allow researchers to explore functionalities towards diverse directions, such as solar cells, light emitting devices, transistors, sensors, etc. Many perovskite nanomaterial-based devices have been demonstrated with extraordinary sensing performance to [...] Read more.
Recently, perovskite-based nanomaterials are utilized in diverse sustainable applications. Their unique structural characteristics allow researchers to explore functionalities towards diverse directions, such as solar cells, light emitting devices, transistors, sensors, etc. Many perovskite nanomaterial-based devices have been demonstrated with extraordinary sensing performance to various chemical and biological species in both solid and solution states. In particular, perovskite nanomaterials are capable of detecting small molecules such as O2, NO2, CO2, etc. This review elaborates the sensing applications of those perovskite materials with diverse cations, dopants and composites. Moreover, the underlying mechanisms and electron transport properties, which are important for understanding those sensor performances, will be discussed. Their synthetic tactics, structural information, modifications and real time sensing applications are provided to promote such perovskite nanomaterials-based molecular designs. Lastly, we summarize the perspectives and provide feasible guidelines for future developing of novel perovskite nanostructure-based chemo- and biosensors with real time demonstration. Full article
(This article belongs to the Special Issue Nanomaterials Synthesis for Both Sensors and Environmental Applications)
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