Article
Chemistry, Analytical
Hossein Dastangoo, Mir Reza Majidi, Maryam Kalantar Hormozi
Summary: In this study, palladized aluminum was used as a new type of solid electrode for the determination of copper using the differential pulse anodic stripping voltammetry (DPASV) technique. The preparation of the electrode involved electroless deposition of metallic palladium on the aluminum surface, resulting in good sensitivity and selectivity. Various experimental variables were optimized, and under the optimal conditions, a linear calibration graph was achieved for copper concentration determination. The proposed method showed no interference and was successfully applied for determining copper content in nutritional supplement tablets.
MICROCHEMICAL JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Xiaoling Wu, Zhixiong Liu, Yunxiang Liu, Minghui Qiu, Dan Xu
Summary: In this paper, a high-performance SERS sensing platform was constructed using self-assembled gold nanoparticles, addressing the challenge of poor reproducibility in conventional methods. The gold nanoparticles exhibited excellent properties and biocompatibility, making them ideal for SERS applications. Machine learning techniques were employed for data processing, enhancing the accuracy and reliability of the SERS analysis. By employing clustering algorithm and principal component analysis, different groups of spectral characteristics could be identified and understood.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Na Zhang, Deshun Cheng, Chaohai Wang, Wen Zhang, Chao Liu, Keying Zhang
Summary: In this study, a graphene oxide - gold nanostars modified electrode was prepared and its morphology was characterized by scanning electron microscopy. The electrochemical performance of the electrode was analyzed using cyclic voltammetry (CV). The tests demonstrated that the final electrode showed a significant electrocatalytic effect for nitrite detection.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Chemistry, Analytical
Natchaya Malarat, Wipawee Oin, Kotchaphan Kanjana, Fonthip Makkliang, Mohamed Siaj, Sujittra Poorahong
Summary: A simple and highly sensitive square wave voltammetric method using a modified pencil graphite electrode for the determination of methylparaben (MP) was reported. The modified electrode showed enhanced electroactivity and antifouling for the oxidation of MP compared to the unmodified electrode. The modified electrode exhibited a stable response, high reproducibility, and repeatability, with a better limit of detection than the unmodified electrode.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Xiuchao Sun, Menglu Duan, Rongteng Li, Yuan Meng, Qiang Bai, Lina Wang, Manhong Liu, Zhugen Yang, Zhiling Zhu, Ning Sui
Summary: In this study, a two-dimensional ultrathin GDY/graphene nanostructure was utilized as an electrode material for electrochemical sensing. The graphene acted as a template for the growth of few-layered GDY and conductive layers. The GDY/G modified with hemin enzyme mimic showed excellent detection performance and demonstrated the feasibility of this electrochemical sensor as a wearable biosensor.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Natalija German, Anton Popov, Almira Ramanaviciene
Summary: Reagentless electrochemical glucose biosensors were developed using graphite rod electrodes modified with dendritic gold nanostructures and redox mediators in combination with glucose oxidase. Among various combinations, the biosensor based on threefold-layer-by-layer-deposited phenathroline-5,6-dione (PD) and glucose oxidase was found to be the most suitable for glucose determination. The performance of the biosensor was further improved by modifying the electrode surface with polypyrrole, resulting in a wide linear dynamic range, high sensitivity, low limit of detection, and good repeatability.
Article
Chemistry, Analytical
Mohebul Ahsan, Anim Dutta, Mehdi Akermi, Mohammad Mahtab Alam, S. M. Nizam Uddin, Nazia Khatun, Mohammad A. Hasnat
Summary: This study investigates the development of a chemisorbed sulfur adlayer onto the surface of a polycrystalline gold electrode, which allows for the electroreduction of hydrogen peroxide in an alkaline medium. The sulfur adsorbed layer significantly reduces the decomposition of hydrogen peroxide and facilitates its reduction process. The presented electrochemical sensor shows high sensitivity and a quick amperometric response to hydrogen peroxide.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Taehui Kwon, Areum Yu, Su-jin Kim, Myung Hwa Kim, Chongmok Lee, Youngmi Lee
Summary: The study presents bimetallic AuRu alloy nanofibers as a bifunctional electrocatalyst for overall water splitting, showing outstanding activity and stability for both oxygen and hydrogen evolution reactions. The AuRu alloy nanofibers exhibit lower overpotential and smaller Tafel slope compared to other catalysts, demonstrating excellent OER and HER performance and stability. The study suggests that AuRu alloy nanofibers have great potential as a practical electrocatalyst for overall water splitting in acidic environments.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Anderson M. Santos, Ademar Wong, Maria H. A. Feitosa, Andy A. Cardenas-Riojas, Sandy L. Calderon-Zavaleta, Angelica M. Baena-Moncada, Maria D. P. T. Sotomayor, Fernando C. Moraes
Summary: Nifedipine, a widely used medication, is crucial for blood pressure management in humans. To effectively address this widespread concern, the development of an electrochemical sensor based on a modified glassy carbon electrode was performed, resulting in a highly active electrode surface for the oxidation of nifedipine. This sensor, combined with a voltammetric method, showed excellent performance in detecting nifedipine in biological and environmental samples.
Article
Chemistry, Analytical
Jinyu Lin, Junchao Qian, Yaping Wang, Yue Yang, Yuxuan Zhang, Jianping Chen, Xingwang Chen, Zhigang Chen
Summary: The article introduces a novel and highly sensitive CeO2-Co3O4 QDs@porous carbon nanocomposite electrochemical sensor for detecting oxytetracycline in water samples. The experimental results show that the electrode exhibits excellent electrocatalytic performance and can effectively detect oxytetracycline.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Messai Youcef, Bezzi Hamza, Hellal Nora, Belbacha Walid, Messali Salima, Belghidoum Ahmed, Foudia Malika, Schmutz Marc, Blanck Christian, Derafa Wassila, Mekki Djamel Eddine, Zerroual Larbi
Summary: A novel modified electrode was developed for non enzymatic glucose determination, offering accurate results and excellent stability and catalytic performance.
MICROCHEMICAL JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Fatma Betul Bal, Esma Sari, Recep Uzek, Elif Logoglu
Summary: A novel visual sensing platform for the detection of mercury (II) ion (Hg2+) was developed in this study using a graphene quantum dots functionalized gold nanoparticles nanocomposite system. The platform achieved selective, sensitive, and rapid sensing of Hg2+ through the prevention of aggregation of AuNPs functionalized with GQDs in the presence of Hg2+.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Lin Zhu, Xue Lv, Haihan Yu, Xiaoran Tan, Yumeng Rong, Weihao Feng, Lina Zhang, Jinghua Yu, Yan Zhang
Summary: In this study, a hand-drawing paper-based bipolar electrode electrochemiluminescence platform was developed for the detection of M.SssI methyltransferase. The platform utilized high electrocatalytic Pt@CeO2 as an ECL co-reaction accelerator and pencil-drawing graphite electric circuits as wires and electrodes. The platform provides a convenient, low-cost and easy-to-operate solution for early disease diagnosis and pathogenesis research.
ANALYTICAL CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Stephane Werwinski, Julian A. Wharton, Mengyan Nie, Keith R. Stokes
Summary: This study focuses on the characterization of a 0.2 mm gold electrochemical sensor in detecting the growth and development of marine biofilms on metallic surfaces. By deconvoluting the abiotic and biotic responses, the study was able to resolve the constituent extracellular electron transfer and biofilm responses. Enhanced oxygen reduction kinetics within the aerobic bacterial biofilm were linked to enzyme and redox mediator activities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Shitao Wang, Hongtao Li, Huanan Huang, Xiaohua Cao, Xiudong Chen, Dapeng Cao
Summary: Porous organic polymers (POPs) have gained widespread attention as a promising material for sensing applications. This review provides a comprehensive overview of POPs as a sensing platform, summarizing the various applications of POP-based sensors and discussing their structure, synthetic strategies, and sensing mechanisms.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Physical
Faiza Rehman, Nazish Parveen, Jibran Iqbal, Murtaza Sayed, Noor S. Shah, Sabah Ansar, Javed Ali Khan, Afzal Shah, Farrukh Jamil, Grzegorz Boczkaj
Summary: The removal of norfloxacin, a widely used pharmaceutical and emerging water pollutant, was studied using various oxidative processes. The use of peroxides, in conjunction with UV-C and UV-C/Fe2+, significantly enhanced the degradation of norfloxacin. Among the processes tested, UV-C/Fe2+/HSO5- showed the best performance.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Muhammad Dilshad, Afzal Shah, Shamsa Munir
Summary: In this study, a sensitive, selective, cost-effective, and environmentally benign electrochemical probe was developed for the detection of ibuprofen (IBP) using a glassy carbon electrode modified with Ag-ZnO and MWCNTs. The designed sensing platform was able to detect IBP down to a limit of detection of 28 nM under optimized conditions. The interaction between IBP and bovine serum albumin (BSA) was also investigated, revealing a strong complex formation with a binding constant of 8.7 x 10(13). This is the first reported example of IBP detection and its complexation with BSA.
Article
Chemistry, Physical
Muhammad Nadir Saleem, Afzal Shah, Naimat Ullah, Jan Nisar, Faiza Jan Iftikhar
Summary: An efficient and reliable electrochemical sensing platform based on COOH-fMWCNTs modified GCE (COOH-fMWCNTs/GCE) was designed for the detection of nanomolar concentration of Nile Blue Sulphate (NBS). The platform showed enhanced peak current response and wide linearity range for NBS, with a detection limit of 1.21 nM. The platform was also found to be reproducible, stable, and selective, and it successfully monitored the photocatalytic degradation of NBS.
Article
Chemistry, Analytical
Fatma Budak, Ahmet Cetinkaya, S. Irem Kaya, Esen Bellur Atici, Sibel A. A. Ozkan
Summary: In this study, a molecularly imprinted polymer (MIP)-based sensor was developed for the electrochemical determination of Tofacitinib citrate (TOF). The sensor exhibited high selectivity, as confirmed by imprinting factor and interference studies. The sensor's performance was characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. Differential pulse voltammetry and electrochemical impedance spectroscopy methods were used for TOF determination, with low limit of detection and limit of quantification values. Recovery analysis with spiked serum and tablet samples validated the accuracy and applicability of the sensor.
Article
Chemistry, Multidisciplinary
Yang Liu, Enbo Zhu, Jin Huang, Ao Zhang, Aamir Hassan Shah, Qingying Jia, Mingjie Xu, Ershuai Liu, Qiang Sun, Xiangfeng Duan, Yu Huang
Summary: Periodic assembly of Pt-Au Janus nanoparticles assisted by peptide T7 was used to create one-dimensional Pt-Au nanowires with periodic alternating Pt and Au nanoblocks. The Pt-Au NWs exhibited significantly improved performance, with 5.3 times higher specific activity and 2.5 times higher mass activity in methanol oxidation reaction (MOR) compared to commercial Pt/C catalyst. Furthermore, the periodic heterostructure enhanced the stability of Pt-Au NWs in MOR, with Pt-Au NWs retaining 93.9% of their initial mass activity, much higher than commercial Pt/C (30.6%).
Article
Chemistry, Physical
Chengzhang Wan, Zisheng Zhang, Juncai Dong, Mingjie Xu, Heting Pu, Daniel Baumann, Zhaoyang Lin, Sibo Wang, Jin Huang, Aamir Hassan Shah, Xiaoqing Pan, Tiandou Hu, Anastassia N. Alexandrova, Yu Huang, Xiangfeng Duan
Summary: Elaborated catalysts design can greatly improve performance under unfavorable reaction conditions. The use of amorphous nickel hydroxide proton sieve on a platinum surface creates an unprecedented performance for alkaline hydrogen evolution reaction. Designing catalytic systems with a specifically tailored local chemical environment like natural enzymes can significantly enhance reaction kinetics and increase catalyst lifetime under unfavorable reaction conditions.
Article
Nanoscience & Nanotechnology
Afzal Shah, Naimat Ullah, Shamsa Munir, Faiza Aslam
Summary: The research aims to contribute to the sustainable development goal of water cleanliness by monitoring and removing toxic effluents from wastewater. An electrochemical sensing platform made of Fe-doped ZnO nanoparticles and multiwalled carbon nanotubes was developed for the detection of brilliant green, achieving a limit of detection of 0.40 nM. Photocatalytic degradation of the dye with nanoparticles was also studied, showing a degradation efficiency of 99% in 30 minutes.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Aamir Hassan Shah, Chengzhang Wan, Yu Huang, Xiangfeng Duan
Summary: The electrocatalytic hydrogen evolution reaction (HER) is crucial for water electrolysis and green hydrogen production. Platinum is the leading electrocatalyst for HER, but its kinetics vary with pH conditions. Understanding the pH-dependent HER kinetics at a molecular level is essential for advancing water electrolysis technologies.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Electrochemistry
Ahmet Cetinkaya, S. Irem Kaya, Sibel A. Ozkan
Summary: Electroanalytical methods have evolved from polarographic applications to sensor strategies, always aiming to detect a wide variety of analytes with high selectivity, sensitivity, user-friendliness, and low cost. This review provides an overview of electroanalytical techniques such as CV, DPV, EIS, and amperometry and their latest applications in analyte determination. The development of next-generation strategies using electroanalytical techniques, including glucose sensors, biosensors, nanosensors, and wearable sensors, is discussed. The commercialization of highly advantageous sensor devices in biomedical, clinical, and environmental applications is a significant milestone in electroanalytical applications.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Electrochemistry
S. Irem Kaya, Mahsa Majidian, Goksu Ozcelikay-Akyildiz, Ahmet Cetinkaya, Burcu Dogan Topal, Esen Bellur Atici, Sibel A. Ozkan
Summary: This study investigated the molecular imprinting process using photopolymerization (PP) and thermal polymerization (TP) techniques. These techniques were integrated with an electrochemical sensor for the determination of Olaparib, a new generation anticancer drug. The PP-MIP and TP-MIP sensors showed good selectivity, sensitivity, accuracy, and precision. The study achieved the first application of MIP-based electrochemical sensors for Olaparib analysis.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Leyla Karadurmus, Esen Bellur Atici, Sibel A. Ozkan
Summary: This study investigates the electrochemical behavior of TOL and its oxidation metabolite TOL-oxo on different electrodes and develops a rapid and precise electroanalytical technique for detecting TOL.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Merve Yence, Ahmet Cetinkaya, Mehmet Emin Corman, Lokman Uzun, Mehmet Gokhan Caglayan, Sibel A. Ozkan
Summary: A sensitive and selective electrochemical sensor based on molecular imprinting polymer (MIP) was developed to detect Codeine (COD) in tablet form and biological fluid samples, obtained from hashish or prepared by methylation from morphine.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Goksu Ozcelikay, Ahmet Cetinkaya, Esen Bellur Atici, Sibel A. Ozkan
Summary: In this study, an electroanalytical quantification method for sugammadex was developed using molecular imprinting via the electropolymerization technique. The EP-MIP(SUG)/SPAuE sensor exhibited high sensitivity and specificity/selectivity, as demonstrated by its ability to detect sugammadex in biological fluids and differentiate it from similar molecules. The EP-MIP(SUG)/SPAuE sensor showed good analytical performance and validation parameters according to ICH guidelines, making it a promising tool for quantitative analysis of sugammadex in various samples.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
Untika Pengsomjit, Waleed Alahmad, Pakorn Varanusupakul, Sibel A. Ozkan, Virender K. Sharma, Charoenkwan Kraiya
Summary: This paper presents a greener methodology for determining streptomycin in honey using gel electromembrane extraction (G-EME) technique with exfoliated graphene (EG). The addition of EG enhances the extraction efficiency and sensitivity. The problem of increased electric current and electroendosmosis due to graphene-based nanomaterials is solved by tuning the acceptor phase's volume.
Article
Chemistry, Analytical
Mehmet Kavacik, Bahar Ince, Fikret Ari, Mehmet Altay Unal, Mustafa Kemal Sezginturk, Sibel A. Ozkan
Summary: This study developed a new portable frequency analyser based on Quartz Tuning Fork (QTF) technology for disease detection. The QTF-based biosensor demonstrated remarkable sensitivity, selectivity, and a wide linear detection range with a low limit of detection. The response of the biosensor was evaluated in commercial human serum samples, and the electrode surface was comprehensively characterized using SEM and AFM.
MICROCHEMICAL JOURNAL
(2023)
