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Recent Advances in Nanomaterial-Based Electrochemical Sensors

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

Deadline for manuscript submissions: closed (31 May 2024) | Viewed by 3287

Special Issue Editor


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Guest Editor
Department of Molecular Science and Engineering, Institute of Polymeric Science and Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Interests: nanomaterials; electrochemical sensors; multiomics research

Special Issue Information

Dear Colleagues,

As one of the most important sensing technologies, the electrochemical sensor has the advantages of fast detection speed, high sensitivity, and low detection limit. Because of their large active surface area and good electron transfer performance, nanomaterials provide a new method for the development of high-performance electrochemical sensors. Nanomaterials, including metal nanoparticles, nanowires, graphene, nanotubes, metal–organic frames, molecularly imprinted polymers, and others, have been used to modify electrodes. The combination of nanotechnology and chemical sensors improves the sensitivity and sensing capability of existing sensors, which are widely used in medical diagnosis, food evaluation, pollutant detection, and other fields.

The purpose of this Special Issue is to introduce the research progress in the field of nanomaterials in electrochemical sensors and the application of advanced electrochemical sensors.

Dr. Kuoyuan Hwa
Guest Editor

Manuscript Submission Information

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Published Papers (3 papers)

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Research

13 pages, 2560 KiB  
Article
Facile Synthesis of Fe-Doped, Algae Residue-Derived Carbon Aerogels for Electrochemical Dopamine Biosensors
by Hao Wu, Qin Wen, Xin Luan, Weiwei Yang, Lei Guo and Gang Wei
Sensors 2024, 24(9), 2787; https://doi.org/10.3390/s24092787 - 27 Apr 2024
Viewed by 587
Abstract
An abnormal level of dopamine (DA), a kind of neurotransmitter, correlates with a series of diseases, including Parkinson’s disease, Willis-Ekbom disease, attention deficit hyperactivity disorder, and schizophrenia. Hence, it is imperative to achieve a precise, rapid detection method in clinical medicine. In this [...] Read more.
An abnormal level of dopamine (DA), a kind of neurotransmitter, correlates with a series of diseases, including Parkinson’s disease, Willis-Ekbom disease, attention deficit hyperactivity disorder, and schizophrenia. Hence, it is imperative to achieve a precise, rapid detection method in clinical medicine. In this study, we synthesized nanocomposite carbon aerogels (CAs) doped with iron and iron carbide, based on algae residue-derived biomass materials, using Fe(NO3)3 as the iron source. The modified glassy carbon electrode (GCE) for DA detection, denoted as CAs-Fe/GCE, was prepared through surface modification with this composite material. X-ray photoelectron spectroscopy and X-ray diffraction characterization confirmed the successful doping of iron into the as-prepared CAs. Additionally, the electrochemical behavior of DA on the modified electrode surface was investigated and the results demonstrate that the addition of the CAs-Fe promoted the electron transfer rate, thereby enhancing their sensing performance. The fabricated electrochemical DA biosensor exhibits an accurate detection of DA in the concentration within the range of 0.01~200 µM, with a detection limit of 0.0033 µM. Furthermore, the proposed biosensor is validated in real samples, showing its high applicability for the detection of DA in beverages. Full article
(This article belongs to the Special Issue Recent Advances in Nanomaterial-Based Electrochemical Sensors)
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14 pages, 5088 KiB  
Article
Enhanced Sensitivity of Electrochemical Sensors for Ammonia-Nitrogen via In-Situ Synthesis PtNi Nanoleaves on Carbon Cloth
by Guanda Wang, Guoxing Ma, Jie Gao, Dong He, Chun Zhao and Hui Suo
Sensors 2024, 24(2), 387; https://doi.org/10.3390/s24020387 - 9 Jan 2024
Cited by 1 | Viewed by 961
Abstract
Pt-based electrochemical ammonia-nitrogen sensors played a significance role in real-time monitoring the ammonia-nitrogen concentration. The alloying of Pt and transition metals was one of the effective ways to increase the detectability of the sensitive electrode. In this paper, a self-supported electrochemical electrode for [...] Read more.
Pt-based electrochemical ammonia-nitrogen sensors played a significance role in real-time monitoring the ammonia-nitrogen concentration. The alloying of Pt and transition metals was one of the effective ways to increase the detectability of the sensitive electrode. In this paper, a self-supported electrochemical electrode for the detection of ammonia nitrogen was obtained by the electrodeposition of PtNi alloy nanoleaves on a carbon cloth (PtNi-CC). Experimental results showed that the PtNi-CC electrode exhibited enhanced detection performance with a wide linear range from 0.5 to 500 µM, high sensitivity (7.83 µA µM−1 cm−2 from 0.5 to 150 μM and 0.945 µA µM−1 cm−2 from 150 to 500 μM) and lower detection limit (24 nM). The synergistic effect between Pt and Ni and the smaller lattice spacing of the PtNi alloy were the main reasons for the excellent performance of the electrode. This work showed the great potential of Pt-based alloy electrodes for the detection of ammonia-nitrogen. Full article
(This article belongs to the Special Issue Recent Advances in Nanomaterial-Based Electrochemical Sensors)
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16 pages, 4212 KiB  
Article
Facile Synthesis of Needle-like Copper Sulfide Structures as an Effective Electrochemical Sensor Material for Neurotransmitter Detection in Biological Samples
by Aravindan Santhan and Kuo-Yuan Hwa
Sensors 2023, 23(21), 8849; https://doi.org/10.3390/s23218849 - 31 Oct 2023
Cited by 3 | Viewed by 982
Abstract
Electrochemical sensors, due to their excellent and unique features, are of high interest nowadays for the detection and monitoring of several biological compounds. In such a case, serotonin (SRN), an important neurotransmitter, was herein studied for its detection in biological fluids since its [...] Read more.
Electrochemical sensors, due to their excellent and unique features, are of high interest nowadays for the detection and monitoring of several biological compounds. In such a case, serotonin (SRN), an important neurotransmitter, was herein studied for its detection in biological fluids since its presence is more crucial to be monitored and detected in clinical and medical applications. Several study strategies have been used to determine the chemical and physical properties. The crystalline size of the constructed copper sulfide (Cu2S) material was measured to be 25.92 nm. The Cu2S was fabricated over the working surface and further analyzed for several sensor parameters to be optimized. The charge transfer resistance of the copper sulfide-modified glassy carbon electrode (Cu2S/GCE) was determined to be about 277.0 Ω. With the linear range from about 0.029 μM to 607.6 μM for SRN, the limit of detection (LOD) was calculated as 3.2 nM, with a good sensitivity of 13.23 μA μM−1 cm2. The sensor experienced excellent repeatability, reproducibility, and long-term stability. The fabricated electrode was selective with the presence of different interfering compounds. The real sample analysis, as determined with the regular addition method with human serum and urine samples, revealed a good recovery percentage. Thus, the employed fabricated electrode material will be highly effective in sensing other analytes of choice. Full article
(This article belongs to the Special Issue Recent Advances in Nanomaterial-Based Electrochemical Sensors)
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