Sensors International最新文献

{"title":"Effect of nickel incorporation on the physicochemical properties and performance of HKUST-1-based MOF immunosensor for DENV-3 NS1 detection","authors":"Neng Astri Lidiawati ,&nbsp;Muhammad Fadlan Raihan ,&nbsp;Angga Hermawan ,&nbsp;Octia Floweri ,&nbsp;Robeth Viktoria Manurung ,&nbsp;Muhammad Iqbal ,&nbsp;Ahmad Nuruddin ,&nbsp;Nugraha ,&nbsp;Brian Yuliarto ,&nbsp;Ni Luh Wulan Septiani","doi":"10.1016/j.sintl.2025.100331","DOIUrl":"10.1016/j.sintl.2025.100331","url":null,"abstract":"<div><div>An electrochemical immunosensor was developed using a modified metal-organic framework (MOF) for detecting dengue virus serotype 3 (DENV-3) NS1. CuNi-MOF frameworks with varying Cu:Ni molar ratios—1:0 (CuNi-1), 5:1 (CuNi-2), 3:1 (CuNi-3), and 1:1 (CuNi-4)—were synthesized, incorporating 10 wt% triethanolamine (TEOA) as a modulator to enhance performance. X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectra confirm the successful formation of CuNi-MOF. Morphological evolution was observed as the Ni content increased to 50 % (CuNi-4), resulting in a transformation from octahedral to bar-like particles. Among the synthesized materials, CuNi-4 exhibited the highest redox current, making it the optimal choice for electrochemical measurements targeting dengue virus (DENV) detection. Using DPV technique, it was found that linear range of DENV-3 antigen concentration is 0.001 ng mL⁻¹ - 5 ng mL⁻¹ with a limit of detection (LoD) of 0.1 pg mL⁻¹. In addition, the CuNi-4 exhibited remarkable selectivity for DENV-3 over the other three dengue virus serotypes. Real sample testing using DENV-3 antigen with variation concentration of 0.001; 0.01; 0.1; 1; and 10 ng mL⁻¹ in commercial human serum resulted in the recovery of 98 %, 94 %, 97 %, 95 %, and 98 %, respectively. The findings highlight the promise of the CuNi-4-based electrochemical immunosensor for detecting NS-1 antigens of DENV-3 with high specificity and sensitivity.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100331"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fast micrometer resolution magneto-optical viscosity measurements with hard magnetic nanoplatelets","authors":"Artem Eliseev ,&nbsp;Vladimir Korolev ,&nbsp;Evgeny Anokhin ,&nbsp;Andrei Chumakov ,&nbsp;Alexander Vasiliev ,&nbsp;Lev Trusov ,&nbsp;Pavel Kazin ,&nbsp;Andrei Eliseev","doi":"10.1016/j.sintl.2025.100337","DOIUrl":"10.1016/j.sintl.2025.100337","url":null,"abstract":"<div><div>The paper reports on the application of hard magnetic nanoplatelets for direct local dynamic viscosity evaluation in liquids through their drag-hindered rotation after a magnetic field. Strontium hexaferrite, SrFe₁₂O₁₉ nanoplatelets with a diameter of 50 nm and a thickness of 5 nm were employed as nanoscale probes. The dynamics of nanoplatelets is investigated with AC magnetometry, small-angle X-ray scattering, and optical absorption/reflectance spectroscopy. Those reveal well-defined relation of drag force and phase lag tangent for platelets rotation under AC magnetization with the viscosity of the medium. The analytical quantitative description for magneto-optical response is provided and utilized successfully for independent viscosity evaluation of various liquids within the viscosity range of 0.5–1000 mPa∙s. The nanoscale size of the probes also enabled viscosity visualization with micrometer resolution in microchannels.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100337"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Palm-size wireless piezoelectric immune-biosensing system for rapid E. coli O157:H7 detection","authors":"Yang Tian ,&nbsp;Lisa Kelso ,&nbsp;Yiting Xiao ,&nbsp;Chaitanya Pallerla ,&nbsp;Ramesh Bist ,&nbsp;Siavash Mahmoudi ,&nbsp;Ziyu Liu ,&nbsp;Haizheng Xiong ,&nbsp;Jeyam Subbiah ,&nbsp;Terry Howell ,&nbsp;Dongyi Wang","doi":"10.1016/j.sintl.2025.100341","DOIUrl":"10.1016/j.sintl.2025.100341","url":null,"abstract":"<div><div>Rapid and accurate detection of <em>Escherichia coli O157:H7</em> is essential for ensuring public health, food safety, and environmental monitoring. Traditional detection methods are often time-consuming and require specialized laboratory infrastructure, limiting their practicality for on-site applications. In this study, we present a palm-sized, wireless piezoelectric immunosensor system designed for the swift and sensitive detection of <em>E. coli O157:H7</em>. The system integrates a gold-coated quartz crystal microbalance (QCM) sensor functionalized with protein A-immobilized antibodies, a polydimethylsiloxane (PDMS) microfluidic channel for efficient sample handling, and a flexible loop antenna for wireless signal transmission. Real-time data is transmitted via Bluetooth to a smartphone application, enhancing user interaction and portability. Sensitivity tests demonstrated a proportional increase in frequency shift corresponding to <em>E. coli O157:H7</em> concentrations, achieving a detection limit as low as 10² CFU ml⁻¹ in field samples. Selectivity tests confirmed minimal cross-reactivity with other bacteria, highlighting the sensor's specificity. The incorporation of immuno-nanobeads amplified the signal, enhancing the system's ability to detect low bacterial concentrations. The portable, self-powered system offers a practical solution for rapid, on-site pathogen detection, addressing critical needs in food safety and environmental monitoring. By enabling timely and accurate detection of contaminants, this technology has the potential to significantly impact public health by reducing the incidence of foodborne illnesses, safeguarding environmental resources, and enhancing overall safety and health outcomes.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100341"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144243560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modify a dual ridge horn antenna for drone jamming applications","authors":"Alaa Hussein Hilal,&nbsp;Ahmed Hameed Reja,&nbsp;Mohammed J. Mohammed","doi":"10.1016/j.sintl.2025.100334","DOIUrl":"10.1016/j.sintl.2025.100334","url":null,"abstract":"<div><div>In the last decade, the number of drones has been increasing and becoming cheaper relative to the damage they can cause, threatening airports, transportation, and military applications. Jamming on drones is becoming more and more significant. Handheld anti-drone jammer antennas require high-gain directivity beam patterns with narrow half-power beam widths (HPBW) while also covering multiple frequency bands that are used by drones. This work has modified the proposed multiband gain and enhanced the narrow beam utilized by the Dual Ridge Horn Antenna (DRHA) to meet the requirements of drone jamming systems. The proposed antenna can cover GPS <span><math><msub><mrow><mi>L</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>, 2.45 GHz, and 5.8 GHz. This work presents a DRHA developed utilizing CST Studio and optimized by using genetic algorithm optimization (GA) that has been employed to improve parameters that enhance selected frequencies. One of the standout features of this design is the incorporation of a dielectric microwave lens, which significantly improved the antenna factor This lens has been inventively crafted using three dielectric constant, <span><math><msub><mrow><mi>ɛ</mi></mrow><mrow><mi>r</mi></mrow></msub></math></span> 2.1, 4, and 4.2 at three different diameters 11 cm, 7 cm and 4 cm as well as different thickness 0.9 cm, 1.3 cm and 1.5 cm, respectively. According to impressive simulations the reflection coefficient has been improved from <span><math><mrow><mo>−</mo><mn>12</mn><mo>.</mo><mn>13</mn></mrow></math></span> dB to an incredible <span><math><mrow><mo>−</mo><mn>19</mn><mo>.</mo><mn>7</mn></mrow></math></span> dB at 2.45 GHz. Regarding to the Vector Network Analyzer (VNA) outcomes the practical design improved from <span><math><mrow><mo>−</mo><mn>8</mn><mo>.</mo><mn>25</mn></mrow></math></span> dB to <span><math><mrow><mo>−</mo><mn>18</mn><mo>.</mo><mn>8</mn></mrow></math></span> dB which reflecting a remarkable enhancement of 43.88% after integrating the dielectric lens. The final dimensions of the fabricated antenna, including the feed section, have been defined as (3.65<span><math><mi>λ</mi></math></span> <span><math><mrow><mo>×</mo><mn>2</mn><mi>λ</mi></mrow></math></span> <span><math><mrow><mo>×</mo><mn>2</mn><mi>λ</mi></mrow></math></span>), aligning excellently with relevant works. Finally, the practical design is an agreement match with simulation results, and the measured peak gain is 7.92 dB at 1.575 GHz, 10.9 dB at 2.45 GHz and 15 dB at 5.8 GHz. The proposed antenna would be suitable for use in a portable handheld jamming system on drones.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100334"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KCl-leakage-free reference electrode based on Ag2O–TeO2 glass and Ti","authors":"Tadanori Hashimoto ,&nbsp;Masato Kano ,&nbsp;Kyota Fujioka ,&nbsp;Naoki Yasuda ,&nbsp;Atsushi Ishihara ,&nbsp;Takuhisa Komi ,&nbsp;Yuji Nishio","doi":"10.1016/j.sintl.2025.100339","DOIUrl":"10.1016/j.sintl.2025.100339","url":null,"abstract":"<div><div>The primary objective of this study was to develop KCl-leakage-free reference electrodes for biomedical, clinical, and food applications, as well as for use in the semiconductor industry. Accordingly, we developed new reference electrodes based on Ag₂O–TeO₂ glass and Ti, employing Ag₂O–TeO₂ glass/Ti and Ti/Ag₂O–TeO₂ glass/stainless steel (SUS) configurations in particular. The investigations revealed that the pH sensitivity of 25Ag₂O·75TeO₂/Ti (3 %) was significantly lower than that of 25Ag₂O·75TeO₂/SUS (12 %). Ag₇Te₄ observed in Ti samples had a higher Te fraction than Ag₂Te observed in SUS samples. The stronger reducing ability of Ti compared to Fe in SUS facilitated the reduction of Te⁴⁺ ions to Te⁰, which subsequently reacted with Ag⁰. This observation supports the hypothesis that the pH sensitivity of Ag₇Te₄ is lower than that of Ag₂Te. Heat treatment of Ti on 25Ag₂O·75TeO₂/SUS resulted in a gray TiO₂/Ti layer surrounded by ocher-colored precipitates, including the Ag–Te alloy. Increasing the Ti content in Ti/25Ag₂O·75TeO₂/SUS reduced its pH sensitivity. A 1:2 Ti weight ratio achieved a pH sensitivity of 5 %, similar to 25Ag₂O·75TeO₂/Ti (3 %). Dividing Ti into three sections eliminated the central TiO₂/Ti layer, leaving only Ag–Te alloys and TeO₂ as the predominant materials. However, this structural modification had no discernible impact on the pH sensitivity. These findings suggest that Ag–Te alloys and TeO₂ can act as primary pH-responsive sites, with TiO₂/Ti having no significant contribution. Since TeO₂ likely has a higher electrical resistivity than Ag–Te alloys, the observed low pH sensitivity results from that of the minor but electrically conductive Ag–Te alloys. Therefore, 25Ag₂O·75TeO₂/Ti is a promising candidate for developing KCl-leakage-free reference electrodes for pH sensors, offering low pH sensitivity.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100339"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanosensor for carcinoembryonic antigen (CEA) detection based on a selective growth-regulating mechanism","authors":"Johan A. Farfán,&nbsp;Mary Licuona,&nbsp;Betty C. Galarreta,&nbsp;Yulán Hernández","doi":"10.1016/j.sintl.2025.100344","DOIUrl":"10.1016/j.sintl.2025.100344","url":null,"abstract":"<div><div>Nanomaterial-based biosensors provide high sensitivity and versatility for the detection of target analytes. Particularly, gold nanomaterials are widely employed as signal transducers due to their unique plasmonic properties. When functionalized with aptamers, these nanostructures gain enhanced selectivity, rapid response capability, and cost-effectiveness. However, the instability of large gold nanoparticles can hinder the exploration of various shapes and sizes.</div><div>In this research, two different types of nanoparticles were used for the development of a carcinoembryonic antigen (CEA), a tumoral biomarker for colorectal cancer, nanosensor. It was proposed a system based on gold nanotriangles (AuNTs) functionalized with the amphiphilic polymer polyvinylpyrrolidone (AuNT@PVP) and a hairpin-shaped aptamer selective to CEA biotinylated at the 3′ end and thiolated at the 5′ end (AuNT@PVP@Apt). Specific recognition process was optimized expecting that CEA would trigger the unfolding of the hairpin structure, exposing biotin moieties that enabled subsequent binding of streptavidin-functionalized gold nanoparticles (AuNP@Strept, 3–5 nm in diameter). However, when analyzing the optical changes observed by UV–Vis–NIR spectroscopy and its correlation with the concentration of CEA, it was observed that the main mechanism involved in the detection was a selective growth mechanism of AuNPs, leading to a really simple and easy way of detecting CEA. The results obtained in this study highlight the intricacies of developing such nanosensors and introduce a novel detection method based on a selective growth mechanism that can be further used for detection.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100344"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144514161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytical model for DG-AlGaN/GaN MOS-HEMT for sensitive analysis of pH analytes and charged biomolecules","authors":"P. Sriramani ,&nbsp;N. Mohankumar ,&nbsp;Lignesh Durai ,&nbsp;Y. Prasamsha ,&nbsp;Nitin Rakesh","doi":"10.1016/j.sintl.2024.100312","DOIUrl":"10.1016/j.sintl.2024.100312","url":null,"abstract":"<div><div>This article introduces an analytical model for double-gate AlGaN/GaN MOS-HEMT biosensors to accurately detect pH analytes and charged biomolecules. The device incorporates nanocavities and operates on the concept of dielectric modulation, presuming the presence of a native oxide layer on the surface of the AlGaN layer. The pH of the analyte is represented as the interface charge. Numerical simulations evaluate the biosensor's effectiveness by analyzing its sensitivity to drain ON current (S_I) and threshold voltage (S_V). The device exhibited a peak S_V of 586.5 mV, a value tenfold more significant than the Nernst limit for pH analyte. The maximum S_I, computed at the peak transconductance, was determined to be 135.5 mA/mm/pH at V_G = −2V and V_D = 5V. The biosensor response to a charged biomolecule is assessed by considering the dielectric constant and charge density (ρ). The biosensor exhibited a maximum S_I of 0.225 at V_D = 5V and V_G = −1V and S_V of 1.488V for charged biomolecule at ρ = 1 × 10¹²/cm². The impact of the bias voltages, ion molar concentration of pH analyte, AlGaN layer thickness and cavity length on the S_I of the device is explored in detail. The S_I for pH analytes is unaffected by the AlGaN layer thickness but enhanced with ion molar concentration and cavity length. However, for charged biomolecules, S_I decreased with increased AlGaN layer thickness and improved with cavity length.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100312"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of a non-enzymatic photoelectrochemical sensor based on a BiOBr-CuO nanocomposite for detecting Glucose and Tetracycline","authors":"AnnieCanisius D ,&nbsp;Joselene Suzan Jennifer P ,&nbsp;Joe Raja Ruban M ,&nbsp;Davis Varghese ,&nbsp;Gladys Joysi M ,&nbsp;Muthupandi S ,&nbsp;Madhavan J ,&nbsp;Victor Antony Raj M ,&nbsp;Saravanan Muthupandian","doi":"10.1016/j.sintl.2024.100310","DOIUrl":"10.1016/j.sintl.2024.100310","url":null,"abstract":"<div><div>In this study, we developed a non-enzymatic photoelectrochemical sensor using a BiOBr-CuO (BiCu) electrode, which was synthesized via solvothermal method. The sensor was designed for the simultaneous detection of glucose and tetracycline. Our study revealed that the BiCu electrode exhibited superior photocurrent generation compared to the individual BiOBr and CuO electrodes, as demonstrated by cyclic voltammetry and amperometric studies. The BiCu electrode's performance has increased due to the formation of a heterojunction between CuO and BiOBr, which modifies the UV–visible DRS spectrum and generates an internal electric field that reduces the recombination of the photogenerated carriers. This enhanced the capability of the sensor to detect both glucose and tetracycline. We successfully applied the proposed photoelectrochemical sensor to detect human blood glucose level. The sensitivity and detection limit for glucose and tetracycline are 0.1342 mAmM⁻¹cm⁻², 0.014 mM and 1.7234 mAmM⁻¹cm⁻², 2.0 μM respectively. Thus, the fabricated electrode demonstrated exceptional catalytic activity, high selectivity, good reproducibility, wide linear detection range, low limit of detection,long-term stability, ease of synthesis, good stability and notable selectivity for detecting both glucose and tetracycline This suggests that the BiCu electrode has significant potential as a reliable platform for the detection of glucose and tetracycline.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100310"},"PeriodicalIF":0.0,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A portable easy-to-use triboelectric sensor for arteriovenous fistula monitoring in dialysis patients","authors":"Salvatore A. Pullano ,&nbsp;Giuseppe Oliva ,&nbsp;Pierangela Presta ,&nbsp;Nazareno Carullo ,&nbsp;Michela Musolino ,&nbsp;Michele Andreucci ,&nbsp;Davide Bolignano ,&nbsp;Antonino S. Fiorillo ,&nbsp;Giuseppe Coppolino","doi":"10.1016/j.sintl.2024.100309","DOIUrl":"10.1016/j.sintl.2024.100309","url":null,"abstract":"<div><div>Hemodialysis is the primary treatment for patients with total loss of renal function and is performed through a vascular access called an arteriovenous fistula (AVF). AVF can be associated with several complications, such as stenosis, thrombosis, and aneurysms. While digital subtraction angiography (DSA) is the gold standard for AVF monitoring, its limited availability, invasiveness, and harmfulness has enabled Doppler ultrasound (DUS) as alternative technique. Herein, the development of a portable device based on a triboelectric sensor for AVF monitoring that exploits the concept of impedance cardiography (ICG) is presented. The triboelectric sensor consists of a thin polyvinylidene fluoride (PVDF) layer placed close to the AVF to evaluate the triboelectric ICG signal (T-ICG), thus avoiding the need for standard multiple-electrode equipment. Electrocardiographic (ECG) dry electrodes based on a composite of polydimethylsiloxane (PDMS) and multi-walled carbon nanotubes (MWCNTs) were fabricated. Concept validation was performed in a cohort of hemodialysis patients with and without AVF stenosis. The results demonstrated a linear dependence between blood flow and the maximum deviation (dZ/dt_max) of the T-ICG pattern. Patients with stenosis showed a statistically significant change in morphology at the B-point. The extent of stenosis was evaluated by analyzing the temporal slope of the ICG pattern in the B- and C-point regions, evidencing a linear trend for stenosis from 20 % up to 60 %. The proposed device represents an innovative approach compared with the gold clinical standards for the continuous monitoring of AVF in hemodialysis patients.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100309"},"PeriodicalIF":0.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photocatalytic and electrochemical sensor detection of ascorbic and uric acid using novel plant extract green synthesis of CaO nanoparticles","authors":"M.N. Somashekar ,&nbsp;M. Dhanalakshmi ,&nbsp;T.S. Nagamani ,&nbsp;T. Subhas Chandra ,&nbsp;T.M. Sharanakumar ,&nbsp;C.R. Ravikumar","doi":"10.1016/j.sintl.2024.100308","DOIUrl":"10.1016/j.sintl.2024.100308","url":null,"abstract":"<div><div>In the present work, a novel fuel made from the leaves of the Gotu kola (Centella Asiatica) plant is used to produce calcium oxide nanoparticles (CaO NPs) in an eco-friendly manner. The results of the PXRD experiments, the average crystallite size for CaO NPs is 38 nm, which is consistent with the findings of the TEM. As per DRS investigation, the energy gap of CaONPs is 3.253 eV. Fast Blue (FB) and Fast Orange (FO) dye photodegradation was effectively enhanced by the plant-mediated CaO NPs under UV-light irradiation, showing high efficiency within 120 min. The CaO demonstrated remarkable photodegradation process against the FO and FB dyes under UV light, with rates of 79.52 % and 61.43 % after 120 min. CaO NPs' electrochemical characteristics were ascertained using a carbon paste electrode (CPE) dipped in a 0.1N HCl solution. In cyclic voltammetry evaluation, the green CaO NPs showed greater sensitivity at various scan rates. Ascorbic acid and uric acid were finally shown to have exceptional redox reaction and ascorbic acid and uric acid detection capabilities when they were used as analytes.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"6 ","pages":"Article 100308"},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}