Alireza Barati Haghverdi , Ilghar Rezaei , Amir Ali Mohammad Khani , Toktam Aghaee
{"title":"Methane detection approach based on THz wave absorber","authors":"Alireza Barati Haghverdi , Ilghar Rezaei , Amir Ali Mohammad Khani , Toktam Aghaee","doi":"10.1016/j.sbsr.2025.100758","DOIUrl":"10.1016/j.sbsr.2025.100758","url":null,"abstract":"<div><div>A simple and efficient methane detection approach has been developed in this paper. A THz wave absorber sensitive to refractive index is designed. The proposed absorber mainly uses nested graphene rings and continuous graphene sheets. Two scenarios are followed in this paper. Firstly, a simple single layer including graphene rings on top of the Kapton dielectric and backside coated gold is suggested. The graphene rings face free space or polluted air with a known refractive index in this situation. The second scenario considers the sample (probably toxic polluted air) in the middle layer and also in free space. Both states are mathematically modeled in terms of referred impedance. Additionally, full-wave simulations are also performed. The equivalent impedance can reveal the absorption response of the structure with the aim of impedance matching or maximum power transmission theorem. Interestingly, the impedance modeling converges to the numerical full-wave simulation, verifying efficient mathematical modeling. Furthermore, ample simulation results are provided to investigate the robustness and reliability of the proposed methane optical detector. Based on the findings, the proposed detector is highly appropriate for gas detection, specifically for the healthcare industry due to using Kapton which makes it flexible and wearable.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100758"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164215","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}
Farzaneh Mohammadi , Mahmoud Roushani , Mina Nasibipour , Mehrangiz Bahrami , S. Jafar Hoseini
{"title":"A novel electrochemical aptasensor for L-tryptophan detection utilizing photoluminescent covalent organic polymer","authors":"Farzaneh Mohammadi , Mahmoud Roushani , Mina Nasibipour , Mehrangiz Bahrami , S. Jafar Hoseini","doi":"10.1016/j.sbsr.2025.100773","DOIUrl":"10.1016/j.sbsr.2025.100773","url":null,"abstract":"<div><div>A novel method was developed for the sensitive detection of L-tryptophan (Trp) utilizing an imine-linked covalent organic polymer (COP) with inherent photoluminescent properties. The COP was synthesized through the reaction of aminoclay (AC) with terephthalaldehyde (TPA). This COP incorporates building blocks featuring a large conjugated aromatic skeleton, high stability, a rough surface, and uniform morphology, facilitating effective binding with aptamers. Electrochemical testing results demonstrated that the aptasensor based on the COP significantly enhanced the detection of Trp, achieving an exceptionally low detection limit of 0.03 fM within a Trp concentration range of 0.1 fM to 500 nM. This detection limit surpasses those of most other reported Trp sensors. Furthermore, the aptamer-based biosensor exhibited remarkable stability and repeatability. This study introduces a new electrochemical sensing approach for Trp detection based on the COP, showcasing a comprehensive understanding of COP-based biosensor design that can be extended to detect various target compounds. The proposed method presents an innovative and cost-effective solution for the swift and accurate identification of Trp using the COP.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100773"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143550408","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 pressure sensor made of laser-induced graphene@carbon ink in a waste sponge substrate using novel and simple fabricaing process for health monitoring","authors":"Aoxun Liang , Weijie Liu , Yuanrui Cui , Peihua Zhang , Xinkun Chen , Junlong Zhai , Wenhao Dong , Xueye Chen","doi":"10.1016/j.sbsr.2024.100730","DOIUrl":"10.1016/j.sbsr.2024.100730","url":null,"abstract":"<div><div>This paper presents a laser-induced graphene (LIG)@ carbon ink sponge (GCS) pressure sensor. This sensor has the advantage of low cost, significantly reducing the manufacturing cost by using simple materials (carbon ink and sponge) and processes. It has a high linearity with R<sup>2</sup> = 0.996, a high sensitivity S = 3.68 kPa<sup>−1</sup>, a response time of 400 ms, and a recovery time of 300 ms. Meanwhile, to reduce the interference of sweat and water vapor in a high-humidity environment, the hydrophobic Ecoflex material is selected and improved by using SiO<sub>2</sub> for packaging, enhancing the practicability of the sensor. The sensor is soft in texture and suitable for human health monitoring, and can be attached to different parts of the human body to monitor various physiological signals. By monitoring the click frequency of the mouse and keyboard, the bending of the arm, the cough at the neck (analyzing its frequency, intensity, and time pattern), the mechanical parameters when walking at the center of the sole, the physiological signal of clenching the fist, and the pressure change when holding a water cup at the center of the palm, it provides a assistance for related fields such as motor function assessment, diagnosis of respiratory system diseases, disease diagnosis and rehabilitation treatment.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100730"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163621","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":"Application of novel oligomeric Co(II) complexes of 4,4′-bipyridine and 1,10-phenanthroline modified glassy carbon electrode for differential pulse voltammetric determination of ciprofloxacin","authors":"Mezgebu Biresaw , Adane Kassa , Getinet Tamiru Tigineh , Atakilt Abebe","doi":"10.1016/j.sbsr.2024.100721","DOIUrl":"10.1016/j.sbsr.2024.100721","url":null,"abstract":"<div><div>Two new oligomer mixed ligand complexes, comprising 21 ([Co<sub>21</sub>(phen)<sub>42</sub>(bipy)<sub>21</sub>]Cl<sub>42</sub> (C2)) and 100 monomer units ([Co<sub>100</sub>(phen)<sub>200</sub>(bipy)<sub>100</sub>]Cl<sub>200</sub> (C3)) were synthesized. These complexes, designated as [Co<sub>21</sub>(phen)<sub>42</sub>(bipy)<sub>21</sub>]Cl<sub>42</sub> (C2) and [Co<sub>100</sub>(phen)<sub>200</sub>(bipy)<sub>100</sub>]Cl<sub>200</sub> (C3), were employed for the modification of a glassy carbon electrode (GCE) to detect ciprofloxacin (CPF) in tablet formulations and human urine samples. By potentiodynamic deposition, the modified electrodes (poly(C2)/GCE) and (poly(C3)/GCE) were prepared, forming a conductive electroactive film on the GCE surface. The modified electrodes were characterized using cyclic voltammetry and electrochemical impedance spectroscopy, which revealed an increased effective surface area and a significant reduction in charge transfer resistance of the electrode. An oxidative peak at a lower potential with a six-fold increase in peak current was observed at the poly(C2)/GCE. The absence of a reductive peak in the reverse scan indicated the irreversibility of the electrochemical oxidation of CPF. The correlation coefficient between the peak current and the square root of the scan rate indicated that CPF oxidation at the poly(C2)/GCE was primarily controlled by diffusion mass transport. With a detection limit of 3.4 × 10<sup>−9</sup> M, the voltammetric current response of CPF at the poly(C2)/GCE under optimal circumstances showed a linear trend with concentrations ranging from 5.0 × 10<sup>−8</sup> to 2.0 × 10<sup>−4</sup> M. It was discovered that the CPF levels in the examined tablet brands fell between 98.35 % and 101.30 % of their stated ranges. The recovery results for tablet and urine samples ranged from 99.44 % to 99.95 % and 99.25 % to 100.51 %, respectively, with interference recovery showing an error of less than 4.73 %. When it came to determining CPF in tablet formulations and human urine samples, the new approach outperformed recently published voltammetric methods. This superiority can be attributed to the simplicity of the electrode modification step, the lowest limit of detection, and a reasonably wide linear dynamic range.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100721"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163485","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":"Advancements in hazardous gases detection: Using dual structures of photonic crystal fiber-based sensor","authors":"Pratishtha Pandey , Sapana Yadav , Adarsh Chandra Mishra , D.K. Dwivedi , Pooja Lohia , R.K. Yadav , Upendra Kulshrestha , Vipin Kumar , Prabhu Paramasivam , R. Bousbih , M. Khalid Hossain","doi":"10.1016/j.sbsr.2025.100738","DOIUrl":"10.1016/j.sbsr.2025.100738","url":null,"abstract":"<div><div>This paper presents a comparative analysis of two distinct nonlinear elliptical hollow-core photonic crystal fiber (PCF) based sensors designed for the detection of three gaseous analytes, namely CCl<sub>4</sub> (<em>n</em> = 1.461), SnCl<sub>4</sub> (<em>n</em> = 1.5086) and C<sub>10</sub>H<sub>16</sub> (<em>n</em> = 1.472). A comprehensive examination is conducted across a wide wavelength range (1.2 μm–2.6 μm). In order to enhance both the fabrication tolerance and sensing performance of the proposed sensors, investigations have been conducted on the diameter of circular and elliptical-shaped air holes, as well as the dimensions of struts and the core size. Silica works as background material for both the sensors. The sensing parameters including relative sensitivity, effective area, birefringence, and dispersion, have been obtained for two different sensors proposed for evaluation. The numerical investigation employs the finite element method based on Comsol Multiphysics. When comparing both sensors, sensor design-2 stands out with an impressive nonlinear coefficient value of 15.470 W<sup>−1</sup>Km<sup>−1</sup>, a higher relative sensitivity of 98.386 %, enhanced effective area of 1.134× 10<sup>−11</sup> m<sup>2</sup>, comparable effective refractive index of 1.496 and significant birefringence −4.701 × 10<sup>−5</sup>, along with low confinement loss for SnCl<sub>4</sub> followed by CCl<sub>4</sub> and C<sub>10</sub>H<sub>16</sub> at 1.2 μm operating wavelength, owing to its higher refractive index compared to sensor design-1 for same sensing analyte. The designed model holds potential applications in sensing, bio-sensing research, and related fields.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100738"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163611","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}
R. Dehdari Vais , M. Negahdary , S.R. Rasouli Nasrabadi , A. Rahi , S.A. Dastgheib , H. Heli
{"title":"Liquid crystal template-assisted electrodeposition of nanoporous nickel microspheres: A sensitive electrochemical sensing platform for electrocatalytic oxidation and quantitative determination of l-carnitine","authors":"R. Dehdari Vais , M. Negahdary , S.R. Rasouli Nasrabadi , A. Rahi , S.A. Dastgheib , H. Heli","doi":"10.1016/j.sbsr.2025.100743","DOIUrl":"10.1016/j.sbsr.2025.100743","url":null,"abstract":"<div><div><span>l</span>-carnitine (LC) is a vital constituent of mammalian tissues, has a significant role in the function of different biological systems, and its determination is of great interest. Electrochemical sensing using nickelaceous nanostructured electrocatalysts offers potential interests and advantages. In the present study, nanoporous nickel microspheres (NNiMs) were electrodeposited and then utilized as an electrode modifier for the electrocatalytic oxidation and determination of LC. NNiMs were electrodeposited on a nickel substrate from a liquid crystal medium containing nickel (II) chloride, and Triton X-100 under a potentiostatic condition. The surface morphological characterization of the obtained nanoporous microspheres was followed by field emission scanning electron microscopy. NNiMs were transformed into the corresponding oxides by applying consecutive potential cycles in an alkaline medium, and the electron transfer coefficient and apparent charge transfer rate constant of the redox species present on the modified electrode surface were calculated as 0.59 and 0.54 s<sup>−1</sup>, respectively. Cyclic voltammetry, chronoamperometry, and steady-state polarization measurements were used for assessing the electrocatalytic oxidation mechanism and kinetics of LC on the NNiMs surface. Based on these measurements, an LC diffusion coefficient of 4.1 × 10<sup>−6</sup> cm<sup>2</sup> s<sup>−1</sup>, a catalytic rate constant of 4.0 × 10<sup>4</sup> cm<sup>3</sup> mol<sup>−1</sup> s<sup>−1</sup>, and an electron transfer coefficient of 0.41 were achieved. The proposed sensor was then employed as a sensitive amperometric sensor for determination of LC with a linear dynamic range of 25 to 217 μmol L<sup>−1</sup>, a calibration sensitivity of 67.85 mA L mol<sup>−1</sup>, and a detection limit of 3.2 μmol L<sup>−1</sup>. The designed sensing platform depicted a stable and reproducible response and insignificant interference from the common species found in the biological fluids and pharmaceutical formulations. Taking all these features together, the developed determination method can be satisfactorily exploited as a simple and quick tool for direct analysis of LC in pharmaceutical oral solutions and human serum samples.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100743"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164200","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}
Wenjun Ming , Yidan Zhu , Wenjun Jiang , Jing Zhang , Jinxia Liu , Li Wu , Yuling Qin
{"title":"Advanced point-of-care biomarker testing for the diagnosis of cardiovascular diseases","authors":"Wenjun Ming , Yidan Zhu , Wenjun Jiang , Jing Zhang , Jinxia Liu , Li Wu , Yuling Qin","doi":"10.1016/j.sbsr.2025.100747","DOIUrl":"10.1016/j.sbsr.2025.100747","url":null,"abstract":"<div><div>Cardiovascular disease (CVD) stands as the primary cause of global mortality, necessitating early diagnosis for mitigating death rates and improving quality of life. Conventional CVD diagnostic techniques necessitate the use of bulky hospital instruments for electrocardiogram recording and immunoassay, resulting in time-consuming and inconvenient limitations. Point-of-care testing (POCT) presents unique benefits compared to traditional central laboratory (CLT) methods, such as accelerated turnaround times for results, enhanced portability, and ease of use, which are especially beneficial in resource-constrained healthcare environments. As a result, POCT is increasingly recognized as an innovative diagnostic strategy for the management of CVD, achieving significant standing across a variety of healthcare scenarios. The present review offers a comprehensive overview of the prevailing categories of cardiovascular diseases and emphasizes the diagnostic application of cardiac biomarkers detected through blood tests. The focus of this study is specifically on POCT devices used for the detection of biomarkers related to cardiovascular disease. Additionally, their performance will be compared and evaluated against traditional CLT methods and commercially available equipment. With the growing implementation of hierarchical medical policies and increasing demand for health management services, the market for POCT cardiac biomarkers testing is expected to expand further as a crucial development direction within the field of medicine.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100747"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164214","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":"TraxVBF: A hybrid transformer-xLSTM framework for EMG signal processing and assistive technology development in rehabilitation","authors":"Seyyed Ali Zendehbad , Athena Sharifi Razavi , Marzieh Allami Sanjani , Zahra Sedaghat , Saleh Lashkari","doi":"10.1016/j.sbsr.2025.100749","DOIUrl":"10.1016/j.sbsr.2025.100749","url":null,"abstract":"<div><div>The fact that people with mobility impairments often have great difficulties in performing essential Activities of Daily Living (ADL) shows the importance of developing effective rehabilitation strategies. To address this need, we propose TraxVBF, a multimodal visual biofeedback submodel using surface Electromyography (sEMG) signals and kinematic movement data to exploit muscle synergy patterns. TraxVBF offers innovative real time visual feedback that can be used to enhance neurorehabilitation systems. Pre-processing and extracting muscle synergy patterns is performed by the Hierarchical Fast Alternating Least Squares (Fast-HALS) algorithm, and key movement points are identified with the Modified MediaPipe algorithm to capture temporal and spatial dynamics with precision using TraxVBF, which is driven by Extended Long Short-Term Memory (xLSTM) and Transformer architectures. This allows the model to predict movement trajectories accurately, enabling motor learning and functional recovery of patients through real time feedback without the expensive hardware. The model is shown to significantly improve performance metrics such as Mean Square Error (MSE), Root Mean Square Error (RMSE), and Coefficient of Determination (R<sup>2</sup>). For healthy participants, TraxVBF-type Base outperforms state of the art models (LSTM and GRU) with an MSE of 0.06 and R<sup>2</sup> of 0.89. Practical evaluations with an average R<sup>2</sup> of 0.880 for healthy participants and 0.327 for patients demonstrate the model generalizability. These results indicate that TraxVBF may be a useful tool to improve motor learning and rehabilitation, and longer term clinical trials and multi-sensory biofeedback are needed.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100749"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164201","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}
Mariana Alegria , Mariana Ballesteros , David Cruz-Ortiz
{"title":"A wireless instrumented insole for monitoring plantar pressure during human locomotion","authors":"Mariana Alegria , Mariana Ballesteros , David Cruz-Ortiz","doi":"10.1016/j.sbsr.2025.100752","DOIUrl":"10.1016/j.sbsr.2025.100752","url":null,"abstract":"<div><div>This work proposes a wireless instrumented insole for monitoring plantar pressure (PP) during human locomotion. The insole is composed of two elements. The first is a mold manufactured with thermoplastic polyurethane using tridimensional printing techniques. The second one is a soft cover fabricated with a liquid polymer Ecoflex™ 00–30 from Smooth-On. The insole considers a microcontroller Arduino Nano and 24 force-sensing resistors located in ten anatomic regions of the foot with a sampling frequency of 70 Hz. The device sends the data through wireless communication based on a Bluetooth module to a graphical user interface in a computer where the data is received, displayed, and stored. A test was carried out with ten healthy volunteers (five men and five women) to validate the PP measured with the device. The data obtained were analyzed and compared with the literature, considering relevant characteristics in the PP analysis.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100752"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143353638","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}
Bahareh Pourbahram , Samira Mansouri Majd , Mojtaba Shamsipur
{"title":"DPV and EIS-based ultrasensitive aptasensor for VEGF165 detection based on nanoporous gold platform modified with SH-aptamer","authors":"Bahareh Pourbahram , Samira Mansouri Majd , Mojtaba Shamsipur","doi":"10.1016/j.sbsr.2025.100766","DOIUrl":"10.1016/j.sbsr.2025.100766","url":null,"abstract":"<div><div>The sensitive detection of trace amounts of vascular endothelial growth factor (VEGF<sub>165</sub>) in samples holds significant potential for clinical cancer diagnosis across various cancer types. This work introduces a novel and cost-effective dual strategy for developing an ultrasensitive electrochemical aptasensor based on the self-assembly of SH-aptamer onto a nanoporous gold electrode for VEGF<sub>165</sub> detection. SEM and electrochemical characterization confirmed the formation of the nanoporous structure and the increase of the surface area of the gold electrode from 0.1199 cm<sup>2</sup> to 0.1875 cm<sup>2</sup>. The sensing method relied on the interaction between the DNA probe and VEGF<sub>165</sub>, which increased the charge transfer resistance of Fe(CN)<sub>6</sub><sup>3−/4-</sup> in the (signal-on) strategy, as determined by EIS. Conversely, it diminished the reduction peak current of the methylene blue probe in the (signal-off) strategy, as assessed by Differential Pulse Voltammetry (DPV). The limit of detection and linear dynamic range of the prepared electrode were found to be 0.25 pM and 2.5 to 140 pM, respectively, using DPV, and 0.18 pM and 5 to 200 pM, respectively, using EIS. The aptasensor demonstrated desirable stability after storing the aptasensor in a buffer solution for one week. Furthermore, analogous proteins did not exhibit significant interference. Also, detecting the VEGF<sub>165</sub> cancer marker in undiluted human serum samples had excellent recovery with relatively low standard deviation percentages. Therefore, the findings indicate that the proposed aptasensor could potentially be utilized in the future design of a non-invasive cancer diagnostic kit using a blood or interstitial fluid test instead of the painful and aggressive biopsy method.</div></div>","PeriodicalId":424,"journal":{"name":"Sensing and Bio-Sensing Research","volume":"47 ","pages":"Article 100766"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480000","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}