Article
Chemistry, Multidisciplinary
Hongyu Liu, Zheng-Ze Pan, Alex Aziz, Rui Tang, Wei Lv, Hirotomo Nishihara
Summary: This study proposes a novel electrode for electrochemical research of amorphous-based porous carbon materials. This electrode is fabricated by coating anodic aluminum oxide formed on an Al substrate with uniform carbon. The conformally carbon-coated layer consists of vertically aligned giant carbon nanotubes with low-crystalline stacked graphene sheets. The model electrode provides representative nanopores of low-crystalline carbon materials and can help clarify complex electrochemical processes in porous carbon electrodes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Stefano Gianvittorio, Isacco Gualandi, Domenica Tonelli
Summary: The development of fast and reliable detection methods for pesticides is needed due to their increasing presence in the environment and food. This paper describes the development of an electrochemical biosensor using alkaline phosphatase as the recognition element and a chemically modified glassy carbon electrode as the transducer. The biosensor showed promising results in detecting pesticides and demonstrated re-usability through a washing procedure.
Review
Chemistry, Analytical
Jagannath Mondal, Jeong Man An, Sachin S. Surwase, Kushal Chakraborty, Sabuj Chandra Sutradhar, Joon Hwang, Jaewook Lee, Yong-Kyu Lee
Summary: The development of accurate diagnosis and monitoring of diseases has become more important after the COVID-19 pandemic. Carbon nanomaterials such as graphene and carbon nanotubes have been considered as important candidates for biosensing channels due to their excellent physical properties. Various sensing methods, including electrochemical, optical, and electrical approaches, have been used in carbon nanotube-based biosensing systems, showing excellent sensitivity and selectivity against viruses and virus DNA structures. These biosensing platforms have great potential in improving healthcare and public health.
Article
Materials Science, Multidisciplinary
Raissa Ribeiro Lima Machado, Tiago Almeida Silva, Taiza Maria Cardoso dos Reis, Uttandaraman Sundararaj, Mohammad Arjmand, Joao Paulo Santos, Aline Bruna da Silva
Summary: This study investigated the electrochemical properties of carbon paste electrodes (CPE) modified with different types of carbon nanotubes (CNTs). The results showed that modification with carbon nanotubes enhanced the anodic peak currents for the electrodes, with the CPE/N-CNT850 electrode exhibiting the best electrochemical response. Additionally, the CPE/N-CNT850 and CPE/MWCNTCOOH electrodes had larger electroactive areas and higher heterogeneous electron transfer kinetics. Furthermore, the CPE/N-CNT850 and CPE/MWCNTCOOH electrodes showed the best correlation of results when detecting Acetaminophen (AC) using differential pulse voltammetry.
DIAMOND AND RELATED MATERIALS
(2022)
Review
Chemistry, Analytical
Hanif Afsharara, Elham Asadian, Bahar Mosta, Kamran Banan, Sara Arjomand Bigdeli, Dara Hatamabadi, Azadeh Keshavarz, Chaudhery Mustansar Hussain, Ruestem Kecili, Fatemeh Ghorbani-Bidkorpeh
Summary: In response to the need for rapid and precise analysis of pharmaceuticals, various sensor-based technologies, particularly electrochemical detection methods, have been developed. Carbon paste electrodes (CPEs) have shown promising properties for conductive electrodes, but lack sufficient selectivity. To overcome this limitation, the addition of molecularly imprinted polymers (MIPs) to the carbon paste matrix can improve the selectivity of sensing platforms. This review provides a categorized report on the recent research and outcomes of MIPs and CPEs in determining pharmaceuticals in complex and simple matrices.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Fudan Zhu, Huilan Shi, Cunli Wang, Xian Zhou, Xin Zhang, Fengchun Yang
Summary: A disposable electrochemical sensor based on a bismuth selenide/carboxylic multiwalled carbon nanotube (Bi2Se3@MWNTs-COOH) nanocomposite has been designed for nitrite detection, showing excellent performance with fast electron transfer rate and high electrochemically active surface area. The sensor has a wide detection range of 0.01 mu M - 7.0 mM and a low detection limit of 0.002 mu M, making it an effective analytical tool for monitoring nitrite. This work provides new insights into nitrite detection and encourages exploration of rapid and cost-effective detection methods using nanocomposites and disposable systems.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Hyeongho Min, Sangyul Baik, Jinhyung Kim, Jihyun Lee, Bo-Gyu Bok, Jin Ho Song, Min-Seok Kim, Changhyun Pang
Summary: The study introduces a diving beetle-inspired electro-adhesive patch that offers high reliability and flexibility for real-time diagnostics of the human body. Utilizing nanowire-implanted conductive multiscale architectures, the device provides a skin-adaptable and stretchable interface.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Analytical
Fatehy M. Abdel-Haleem, Sonia Mahmoud, Nour Eldin T. Abdel-Ghani, Rasha Mohamed El Nashar, Mikhael Bechelany, Ahmed Barhoum
Summary: Levofloxacin (LF) is an important antibiotic used for bacterial infections. Three carbon paste electrodes (CPEs) were fabricated for LF determination, with the PVC membrane modified CPE showing improved sensitivity and selectivity.
Article
Chemistry, Inorganic & Nuclear
Lu Zhang, Weichao Chen, Ting Wang, Yunjiang Li, Chunhui Ma, Yuxiao Zheng, Jian Gong
Summary: This study presents a one-step strategy for loading PW11Co polyoxometalates on graphene-like Co0.85Se on conductive glass substrates, forming a transparent PW11Co/Co0.85Se composite counter electrode with excellent electrocatalytic performance. The efficiencies of DSSCs using this composite electrode are higher than those with Pt or pure Co0.85Se electrodes, marking the first use of polyoxometalates in bifacial DSSCs and expanding their application in photoelectronic devices.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Rui Lobo, Noe Alvarez, Vesselin Shanov
Summary: The study compared advanced carbon nanostructured electrodes under similar hydrogen uptake/desorption conditions using recent molecular beam-thermal desorption spectrometry. Results showed that the carbon nanostructured electrodes exhibited enhanced hydrogen adsorption and storage capabilities, with carbon nanotube threads showing potential to replace heavier metals or alloys as hydrogen storage media.
Article
Chemistry, Analytical
Jin Zhu, Yi He, Lijun Luo, Libo Li, Tianyan You
Summary: In this research, an innovative electrochemical sensor was developed for the detection of Diuron pesticide. The sensor showed a wide linear range, low limit of detection, and high sensitivity. It also demonstrated good anti-interference performance, reproducibility, and stability.
Article
Chemistry, Physical
Eunji Kim, Byeong-Joo Lee, Kathleen Maleski, Yoonjeong Chae, Yonghee Lee, Yury Gogotsi, Chi Won Ahn
Summary: This study presents a method for fabricating on-chip symmetric MSCs with coplanar interdigitated electrodes using focused-ion-beam process and carbon nanotube electrodes. The micro supercapacitors produced have high areal capacitance with narrow gaps between electrode fingers, while electron beam lithography and photolithography are utilized to create ultra-small footprint devices.
Article
Chemistry, Multidisciplinary
Rajesh Madhuvilakku, Yi-Kuang Yen, Wei-Mon Yan, Guang-Wei Huang
Summary: Analysis of pharmaceutical active ingredients is crucial for quality control and clinical trials. A flexible three-electrode system using laser-scribed graphene (LSG) technology is proposed in this study, which exhibits excellent analytical performance and acceptable selectivity.
Article
Chemistry, Analytical
Hasan Huseyin Ipekci, Merve Ozcan, Busra Gizem Turkyilmaz, Aytekin Uzunoglu
Summary: Nickel/nickel oxide/nickel-boron particles were decorated on the surface of graphene to develop high-performance electrochemical sensors. The nanohybrid structures showed excellent storage stability, selectivity, and recovery results, with a wide working window for analytes such as acetaminophen.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Multidisciplinary
Julia Ackermann, Jan Stegemann, Tim Smola, Eline Reger, Sebastian Jung, Anne Schmitz, Svenja Herbertz, Luise Erpenbeck, Karsten Seidl, Sebastian Kruss
Summary: Optical nanosensors based on single-wall carbon nanotubes are able to capture the dynamics of biochemical processes. A one-step phase separation approach has been developed to isolate monochiral (6,4)-SWCNTs from mixed SWCNT samples, enabling high-resolution imaging in the near-infrared spectrum using standard Si-based cameras. (6,4)-SWCNTs modified with (GT)(10)-ssDNA become highly sensitive to the neurotransmitter dopamine, allowing for fast and high-resolution imaging of dopamine release from cells.
Article
Chemistry, Analytical
Abd-Elgawad Radi, Nadia Abd El-Ghany, Tarek Wahdan
Article
Chemistry, Analytical
Abd-Elgawad Radi, Nadia Abd El-Ghany, Tarek Wahdan
JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY
(2016)
Review
Chemistry, Analytical
Abd-Egawad Radi, Tarek Wahdan, Amir El-Basiony
CURRENT ANALYTICAL CHEMISTRY
(2019)
Article
Chemistry, Analytical
Reda Elshafey, Abd-Elgawad Radi
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2018)
Article
Chemistry, Analytical
Abd-Elgawad Radi, Alsayed Eissa, Tarek Wahdan
Article
Chemistry, Analytical
Abd-Elgawad Radi, Alsayed Eissa, Tarek Wandan
Summary: An impedimetric sensor based on molecularly imprinted polymer of poly o-phenylenediamine was developed for the detection of Deoxynivalenol (DON) in food samples, showing high sensitivity and regeneration capability with a limit of detection of 0.3 ng mL(-1).
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Abd-Elgawad Radi, Alsayed Eissa, Tarek Wahdan
MONATSHEFTE FUR CHEMIE
(2020)
Article
Biochemical Research Methods
Abd-elgawad Radi, Hassan El-samboskany
COMBINATORIAL CHEMISTRY & HIGH THROUGHPUT SCREENING
(2020)
Article
Chemistry, Multidisciplinary
Abd-Elgawad Radi, Waganat Fakherel-Dien Ashour, Tarek Wahdan
Summary: The electrochemical oxidation behavior of pentamidine drug in aqueous solutions was investigated, revealing pH-dependent irreversible oxidation peaks at high anodic potentials. The interaction between pentamidine and dsDNA was studied through changes in oxidation signal intensity, with a decrease in peak current used as an indication of the interaction event. Subsequent immobilization of dsDNA on glassy carbon electrode surface allowed for further assessment of the pentamidine-dsDNA interaction.
MONATSHEFTE FUR CHEMIE
(2021)
Review
Medicine, General & Internal
Abd-Elgawad Radi, Maha Ragaa Abd-Ellatief
Summary: This article reviews the diversity of electrochemical aptasensors for target analyte detection, covering strategies of aptamer immobilization, types of sensors, and applications for clinically important biomarkers.
Article
Chemistry, Analytical
Abd-Elgawad Radi, Maha Ragaa Abd-Ellatief
Summary: A molecularly imprinted polymer (MIP) electrochemical sensor for entacapone (ETC) was developed based on electropolymerised polyphenylenediamine (Po-PD) on a glassy carbon electrode (GCE) surface. The sensor exhibited linear response to ETC concentration with a low limit of detection and excellent selectivity against levodopa and carbidopa. The MIP sensor was successfully applied for ETC detection in spiked human serum samples.
Article
Chemistry, Analytical
Abd-Elgawad Radi, Reham Oreba, Reda Elshafey
Summary: A reusable molecularly imprinted polypyrrole (MIP(O-PPy)) electrode was developed to detect profenofos in food, with optimized experimental parameters and excellent recognition performance.
Article
Chemistry, Multidisciplinary
Amira El-Shobaky, Reda Elshafey, Abd-Elgawad Radi
Summary: This study investigated the interaction between a textile dye and DNA using cyclic voltammetry, differential pulse voltammetry, and UV-visible spectroscopy, showing that the dye binds to DNA through a combined effect of intercalation and electrostatic interactions. The results suggest a 1:1 complex formation between the dye and DNA, with binding constants calculated at pH 4.0. Overall, the study indicates that the dye can cause DNA damage through its interaction with DNA.
CANADIAN JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Analytical
Reda Elshafey, Ghada Fathey Abo-Sobehy, Abd-Elgawad Radi
Summary: A nanocomposite of graphene oxide and graphene quantum dots was utilized to detect ds-DNA-dimethoate interaction and fabricate DNA biosensors. The modified electrodes were characterized by microscopic and electrochemical methods to confirm the mechanism of DMT oxidation on the platform.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Abd-Elgawad Radi, Alsayed Eissa, Tarek Wahdan
ANALYTICAL METHODS
(2019)
