Article
Chemistry, Analytical
Sedhu Nagarajan, Raj Vairamuthu
Summary: In this study, a tin incorporated chitosan polymer matrix coated pencil graphite electrode was fabricated for the electrochemical detection of riboflavin. The electrode showed sensitive and fast electrocatalytic response with wide linear range and low limit of detection, as well as better stability and antiinference ability. The fabricated electrode demonstrated satisfactory results for medicinal and food analysis applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Ayca Urcuk, Dilek Eskikoy Bayraktepe, Ceren Yildiz, Zehra Yazan
Summary: This work investigates the interaction between double-stranded calf thymus DNA (dsDNA) and the food additive vanillin through voltammetry. The study reveals the binding of vanillin to DNA through intercalation and electrostatic attraction.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Partha Sarthi Deepti, Partha Sarthi Mondal, Chittatosh Pal, Amitesh Kumar, Subrata Majumder
Summary: A novel and label-free electrochemical sensing strategy was developed using a low-cost pencil graphite electrode for ultra-low-level dopamine detection. Optimized deposition voltage and time were utilized in anodic sweeping voltammetry (ASV) technique to perform electrochemical measurements of dopamine on the graphite electrode. With a sensitivity of 0.022 μA/nM.cm2, the graphite electrode showed high selectivity in detecting dopamine down to a concentration of 26.5 nM in the presence of other interfering bioanalytes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Analytical
S. Aghris, M. Matrouf, F. E. Ettadili, F. Laghrib, Y. El Bouabi, S. Saqrane, A. Farahi, M. Bakasse, S. Lahrich, M. A. El Mhammedi
Summary: A novel PGE modified with clay microparticles was developed for quantitative measurements of FBD, showing high selectivity and sensitivity across different samples. The sensor exhibited a linear response to FBD concentration and was effective in wastewater, river water, and rice samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Rumeysa Ekici, Betul Bozdogan, Emir Baki Denkbas
Summary: Infectious diseases caused by viruses have become one of the most important problems for people worldwide. The polymerase-chain-reaction (PCR)-based methods have been widely used for disease identification, but they have some disadvantages. This study introduces a low-cost, miniaturized electrochemical platform for measuring viral proteins. The square wave voltammetry technique was used for detection, and the results showed fast and accurate measurement of the N protein of the SARS-CoV-2 virus.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Santhy Antherjanam, Beena Saraswathyamma
Summary: This study focuses on the fabrication of an electrochemical sensor using a modified pencil graphite electrode for simultaneous determination of hydrazine and hydroxylamine, showing a wider linear range and lower detection limits than reported literature for both analytes.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Bhama Sreelekshmi, Bhama Sajeevan, M. G. Gopika, Aswathy S. Murali, Sakkarapalayam Murugesan Senthil Kumar, Beena Saraswathyamma
Summary: A simple and disposable electrochemical sensor was developed by electropolymerizing vitamin B complex (Vitamin B2/Riboflavin) on a pencil graphite electrode (PGE) for monitoring organic pollutants in water systems, specifically 4-Nitrophenol (4-NP). The sensor demonstrated increased anodic peak current for 4-NP oxidation compared to a bare PGE. The adapted sensor was characterized using various techniques, and factors affecting the current response were optimized. The sensor exhibited high stability, reproducibility, and repeatability, making it an ideal tool for detecting 4-NP in real water samples.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Electrochemistry
P. K. Neena, K. Reshma, Aarathi Pradeep, Bipin G. Nair, T. G. Satheesh Babu, Punathil Vasu Suneesh
Summary: This paper presents a novel electrochemical biosensor for estimating haemoglobin levels in alkaline conditions. The sensor shows high selectivity, linear response range, and sensitivity. It is validated by testing with whole blood samples.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Bhama Sajeevan, M. G. Sreelekshmi, M. G. Gopika, A. Santhy, Mani Govindasamy, Beena Saraswathyamma
Summary: This study reports the development of a poly-terephthalic acid modified pencil graphite electrode (PGE) for the quantitative detection of vitamin B6 (VB6) in pharmaceutical samples. The sensor was characterized using various techniques and the electro-oxidation of VB6 on the electrode was investigated. The results showed that the electrode has a linear range of 0.1-3500 μM and a LOD of 0.0102 μM, making it suitable for pharmaceutical analysis.
Review
Materials Science, Multidisciplinary
Zaklina Z. Tasic, Marija B. Petrovic Mihajlovic, Ana T. Simonovic, Milan B. Radovanovic, Milan M. Antonijevic
Summary: Electrochemical methods offer advantages for analysis and detection of chemical compounds, with pencil graphite electrodes proving to be an efficient and cost-effective material for detecting low concentrations of pharmaceutical compounds like paracetamol around 10(-9) M.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Azar Dehnavi, Ahmad Soleymanpour
Summary: A highly sensitive electrochemical sensor for the determination of guaifenesin was developed using a modified pencil graphite electrode, which showed significantly enhanced electrode response during the modification process. The effective surface area of the electrodes was determined using the chronocoulometry method, with an increase in surface area at each electrode modification step. After optimization, the sensor displayed a linear relationship between GF concentration and peak current within a certain range.
Article
Chemistry, Multidisciplinary
Djihane Slimane Ben Ali, Ferial Krid, Mouna Nacef, El Hadi Boussaha, Mohamed Lyamine Chelaghmia, Habiba Tabet, Radia Selaimia, Amira Atamnia, Abed Mohamed Affoune
Summary: In this paper, a low-cost carbon paste electrode based on modified polyaniline (PANI) and green synthesized copper oxide nanoparticles (CuONPs) was used as a sensor for Cd2+, Pb2+, and Hg2+ for the first time. The electrode was characterized by various techniques and its electrochemical behavior was evaluated. The sensor demonstrated high sensitivity for detecting very low concentrations of Cd2+, Pb2+, and Hg2+ in HCl solutions, as well as simultaneous detection of these ions with low limits of detection. It also showed good selectivity, reproducibility, and stability for trace analysis in environmental samples.
Article
Chemistry, Analytical
Nagarajan Sedhu, Jaganathan Jagadeesh Kumar, Paramasivam Sivaguru, Vairamuthu Raj
Summary: The electronic conductivity and electrocatalytic property of an electrode can be improved by coating its surface with a thin film, polymer, or some nanomaterial; however, the fabrication procedure is time-consuming, expensive, and requires multiple steps. In this study, an electrochemically polymerized polyglycine-coated pencil graphite electrode (PGl/PGE) was prepared for the sensitive detection of riboflavin (RF). The PGl/PGE sensor exhibited significantly enhanced charge transfer compared to the uncoated electrode. The sensor demonstrated a linear concentration range of 2-450 nM for RF detection with a limit of detection of 1.24 nM.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Umit Gege, Serkan Karakaya, Yusuf Dilgin
Summary: A sensitive DP voltammetric method was developed for the determination of trifluralin at a disposable pencil graphite electrode, with good linear relationships between oxidation and reduction peak currents. The LOD and sensitivity values for both oxidation and reduction were determined, showing acceptable recovery values from real water samples.
Article
Chemistry, Analytical
Silvija Safranko, Anamarija Stankovic, Abdelilah Asserghine, Martina Jakovljevic, Sugato Hajra, Srijita Nundy, Martina Medvidovic-Kosanovic, Stela Jokic
Summary: In this study, electroactivated disposable pencil graphite electrode was utilized for the detection of bioflavonoid hesperidin, showing a linear relationship between peak current and hesperidin concentration. Two different electrode processes were observed, with the oxidation of hesperidin being irreversible and most pronounced at pH=5.0. Additionally, quantification of hesperidin in pharmaceutical formulations showed a good correlation between voltammetric analysis and standard HPLC technique results.
Article
Chemistry, Analytical
Selen Uruc, Ozge Gorduk, Yucel Sahin
Summary: An anodically pretreated pencil graphite electrode with oxygen-containing groups was used for the determination of Allura Red by differential pulse voltammetry method.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sibel Yazar, Melih Besir Arvas, Yucel Sahin
Summary: In this study, a Fe-doped polyaniline/dye-functional composite modified carbon felt electrode was synthesized, and the effect of acidic dye concentration on supercapacitor performance was investigated. The results showed that the capacitance increases due to the strong interaction between PANI and dye molecules, improving the performance of pseudocapacitive supercapacitors by providing potential redox materials.
Article
Chemistry, Multidisciplinary
Melih Besir Arvas, Hurmus Gursu, Metin Gencten, Yucel Sahin
Summary: In this study, S, N co-doped graphene-based electrodes were synthesized using Yucel's method. The prepared electrodes were characterized using spectroscopic, microscopic and electrochemical methods. The supercapacitor performances of the electrodes were evaluated through cyclic charge-discharge tests in specific electrolyte solutions, with the areal capacitance values varying with current density.
Article
Polymer Science
Yusuf Kahraman, Hurmus Gursu, Melih Besir Arvas, M. Giray Ersozoglu, Mohammadreza Nofar, A. Sezai Sarac, Yucel Sahin
Summary: In this study, S-doped graphene (SG) powders were prepared using a green, quick, and cheap method. The powders were used to prepare SG/polylactide (PLA) nanocomposites. The addition of low amounts of SG significantly improved the tensile strength and modulus of the nanocomposites. The applied potential and the structural properties of SGs had different effects on the final tensile properties of the nanocomposites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Electrochemistry
Ebrar Dokur, Selen Uruc, Ozge Gorduk, Yucel Sahin
Summary: An electrochemical immunosensor using gold nanoparticles, EDOT, and Py was developed for sensitive detection of CEA. The sensor showed low-cost, selective, and rapid detection of CEA with excellent anti-interference ability against various substances. It is suitable for application in clinical screening.
Article
Chemistry, Analytical
Zeynep Serbest, Ozge Gorduk, Yucel Sahin
Summary: This study presents an electrochemical method for the determination of low levels of l-Tyrosine (l-Tyr) using an electrochemically treated pencil graphite electrode (EPGE). The EPGE exhibits high electrocatalytic performance and has a low detection limit for l-Tyr. It also demonstrates good selectivity in the presence of organic species. Furthermore, the EPGE shows accurate results in the determination of l-Tyr in yogurt and milk samples, indicating its practicality as a sensor.
ANALYTICAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Ayse Hacinecipoglu, Metin Gencten, Melih B. Arvas, Yucel Sahin
Summary: Thin films of cobalt oxides (CoO2, Co3O4) were prepared using the electrochemical method on pencil graphite and indium tin oxide surfaces, and the substrate effect on oxide formation was studied. The cobalt oxides were characterized using X-ray diffraction, Atomic force microscope, and Scanning electron microscope. The synthesis of cobalt oxide crystal structures was achieved on different substrates and at extremely low temperatures using cyclic voltammetry, suggesting the potential use of these electrodes in solar cell applications.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Taskin Basili, Hilal Yildirim Kalyon, Metin Gencten, Mustafa Macit, Yucel Sahin
Summary: Novel oxime compounds and their complexes were synthesized and used as additives in the electrochemical preparation of poly(aniline-co-pyrrole). Spectroscopic characterization and performance testing were conducted on these materials and electrodes, demonstrating the potential of oxime compounds for high-performance supercapacitors.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Ebrar Dokur, Selen Uruc, Ozge Gorduk, Yucel Sahin
Summary: This study reports a new electrochemical sensor platform prepared using tetraoctylammonium ions (TOA(+)) for efficient determination of reduced beta-nicotinamide adenine dinucleotide (NADH). The sensor was characterized using various techniques and showed excellent analytical performance, including low detection limits, high sensitivity, stability, and specificity. The proposed TOA(+)/PGE-based sensor displayed good performance in detecting NADH levels in human blood samples, even in the presence of interfering species.
Article
Engineering, Electrical & Electronic
Melih Besir Arvas, Nilgun Karatepe, Metin Gencten, Yucel Sahin
Summary: Coin cell symmetrical supercapacitors were prepared using S,N co-doped graphene powders obtained through Yucel's Method with cyclic voltammetry. Characterization of the powders was performed through electrochemical, spectroscopic, and microscopic analysis. The specific capacitances of the coin cell symmetrical supercapacitors were determined through cyclic charge-discharge tests, with the highest specific capacitance reaching 188.3 F.g(-1), and the highest energy and power values being 163.4 Wh.kg(-1) and 2173.9 W.kg(-1), respectively.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Sezgin Yasa, Okyay Kumbasi, Melih Besir Arvas, Metin Gencten, Mutlu Sahin, Yucel Sahin
Summary: In this study, nitrogen doped graphene oxide (N-GO) and sulfur doped graphene oxide (S-GO) were synthesized and converted into composite form with polyaniline (PANI) to prepare triple composite electrode materials for supercapacitors. The heteroatom doped graphene oxides and PANI were characterized using spectroscopic and microscopic methods. The electrode materials showed excellent capacitive behavior and retained high efficiency after cyclic charge-discharge tests.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Melih Besir Arvas, Emirhan Artar, Ozge Gorduk, Semih Gorduk, Yucel Sahin
Summary: Supercapacitors (SCs) are an interesting alternative energy storage and conversion system to solve the global energy problem. This study successfully prepared hybrid composite materials consisting of metallo phthalocyanine doped-titanium dioxide (MPc-TiO2) and high conductivity graphene (Gr) and polyaniline (PANI) on a pencil graphite electrode (PGE) using the cyclic voltammetry method. The optimized CoPc-TiO2/Gr/PANI/PGE electrode showed a highly specific capacitance of 401.5 F g(-1) at 5 A g(-1) and excellent cyclic stability up to 1000 cycles. This strategy provides a new avenue for developing high-performance SCs through the rational integration of MPc-TiO2 with Gr and PANI.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Selen Uruc, Ebrar Dokur, Rabianur Kurteli, Ozge Gorduk, Yucel Sahin
Summary: The increasing demand for real-time and continuous human health monitoring and uninterrupted human-machine interaction has led to the development of wearable devices. Graphene oxide as a new 2D material with superior properties has been utilized in wearable sensors. Conductive inks containing graphene materials have shown promise in producing flexible, disposable, wearable, and miniature devices. This study synthesized a conductive ink containing sulfur-doped graphene oxide (S-GO), polyvinylidene fluoride (PVDF), and N-methyl-2-pyrrolidone (NMP), and coated it on a polyester/cotton blended fabric substrate to prepare conductive fabric electrodes (CFEs). The characterization and electrochemical behaviors of the CFEs, including the detection of biological substances, were investigated.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Selin Guemruekcue, Mukaddes oezcesmeci, Nilufer Kocyigit, Kerem Kaya, Ahmet Gul, Yuecel Sahin, Ibrahim oezcesmeci
Summary: Tridentate nitrogen donor ligands, such as 1,3-bis(2-pyridylimino)isoindole (BPIs), have been widely used in inorganic chemistry due to their easy synthesis, modifiable structure, and high stability. This study focused on the synthesis and characterization of a derivative of 1,3-bis(2-pyridylimino)isoindoline with a naphthoxy unit and its palladium complex. The modified electrodes, BPI-CF and PdBPI-CF, were investigated for their performance in a vanadium redox flow battery system, with discharge capacity maxima of approximately 301 mA h (1204 mA h L-1) and approximately 303 mA h (1212 mA h L-1) achieved, respectively.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.
