Article
Chemistry, Physical
Muhammad Danish, Alia Ashraf, Zeshan Ali Sandhu, Muhammad Asam Raza, Ali Haider Bhalli, Abdullah G. Al-Sehemi
Summary: Nanocomposites of various metal sulfides were synthesized using a soft template method and characterized for their spectral, morphological, and electrochemical properties. The results showed that these composites exhibited desirable properties for potential energy storage applications.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Biochemistry & Molecular Biology
Zanlin Chen, Haiming Li, Miaojia Xie, Fengguang Zhao, Shuangyan Han
Summary: This study presents a label-free aptamer biosensor based on gold nanoparticles/multi-walled carbon nanotubes @ titanium dioxide (AuNPs/MWCNTs@TiO2) for sensitive detection of malachite green (MG). The nanocomposite provides a large surface area and good electrical conductivity, facilitating aptamer immobilization. The detection is achieved by measuring the change in electrical signal resulting from the detachment of aptamer from complementary chain (cDNA) and binding to MG. Under optimal conditions, the sensor demonstrates good linearity and a low limit of detection (LOD).
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Electrochemistry
Shuto Osaki, Wilfred Villariza Espulgar, Shin-ichi Wakida, Masato Saito, Eiichi Tamiya
Summary: This study quantitatively determined the kinetic parameters of AuNPs on disposable screen-printed electrodes and investigated the impact of antibodies and blocking agents on these parameters. The investigation of the kinetics and signal amplification of AuNPs on electrodes made of different materials contributes to the improvement of sensor sensitivity.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Organic
Aya Yoshimura, Keisuke Henmi, Ayaka Handa, Kohei Kagawa, Takashi Shirahata, Yohji Misaki
Summary: Novel bis- and tetrakis(diphenylphosphino)tetrathiafulvalenes with an anthraquinoid spacer exhibit typical geometry and cyclic voltammograms indicating two different reduction processes.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Vidyadevi A. Jundale, Abhijit A. Yadav
Summary: CoFe2O4 thin films were prepared using chemical spray pyrolysis and characterized for their structural, morphological, compositional, optical, electrical, and electrochemical properties. The films exhibited the spinel cubic phase with a crystallite size ranging from 15 to 23 nm. They showed a porous spherical granular surface morphology. The films had an optical bandgap of 2.33 eV to 2.54 eV and demonstrated semiconducting behavior. The CoFe2O4 thin film prepared at 425 degrees C showed excellent electrochemical properties, making it a potential candidate for supercapacitors.
Article
Polymer Science
Ancuta Dinu, Constantin Apetrei
Summary: This study presents the development of a new enzyme sensor for the quantification of tyrosine in pharmaceuticals. The enzyme sensor showed a low limit of detection and high sensitivity, and was validated using infrared spectrometry on pharmaceuticals from different manufacturers.
Article
Chemistry, Analytical
Zhiquan Song, Jun-Hee Park, Hong-Rae Kim, Ga-Yeon Lee, Min-Jung Kang, Moo-Hwan Kim, Jae-Chul Pyun
Summary: In this study, carbon electrodes for electrochemical immunoassays were prepared by pyrolyzing parylene-C films deposited using plasma deposition and thermal deposition methods. The influence of the deposition method on the crystal and electronic structures was analyzed, and the electrochemical properties of the pyrolyzed carbon films were compared. The pyrolyzed carbon electrode from parylene-C showed potential for the diagnosis of human hepatitis-C using various amperometric methods.
Article
Biochemistry & Molecular Biology
Eugenia P. Kramarova, Alexander D. Volodin, Vadim V. Negrebetsky, Anastasia D. Shagina, Teimur M. Aliev, Pavel Dorovatovskii, Roman A. Novikov, Anna V. Vologzhanina, Alexander A. Korlyukov
Summary: Hexacoordinated heteroligand silicon catecholates, which are potentially soluble compounds with high hydrolytic stability and diverse redox properties, were synthesized via transesterification and characterized by various analytical techniques. The compounds showed high hydrolytic stability and diverse redox properties, with up to three oxidation waves observed.
Article
Chemistry, Inorganic & Nuclear
Nazir Ahmad Mala, S. Sivakumar, Khalid Mujasam Batoo, Muhammad Hadi
Summary: This study demonstrates the synthesis of pristine and iron-doped nickel oxide nanoparticles using a precipitation method and investigates their optical, magnetic, and supercapacitor properties. The findings show that the optical bandgap of NiO nanoparticles increases with increasing doping concentration of iron, and the doped sample exhibits ferromagnetic behavior at room temperature. The iron-doped sample shows promising properties as a supercapacitor electrode material, suggesting potential for future supercapacitor applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Zeenat Jabeen, Asadullah Dawood, Muneerah Alomar, Salman Naeem Khan, Ihsan Ali, Muhammad Asif, Waseem Abbas, Muhammad Sultan Irshad, Mukhtar Ahmad
Summary: A series of single-phase nickel-substituted magnesium spinel ferrites were synthesized using the hydrothermal technique, and their morphology, structure, magnetism, and electrochemical properties were investigated. Experimental characterization techniques confirmed the presence of a single-phase spinel structure, with a decrease in lattice parameter and clustering of nanoparticles as nickel concentration increased. Raman and FTIR spectra indicated changes in wave numbers and the shortening of Fe-O bonds. Additionally, the ferrites exhibited increased saturation magnetization, decreased coercivity, decreased specific capacitance, and increased loop size. These ferrites are promising for energy storage applications.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Seemita Banerjee, Ananya Chowdhury, Amreesh Chandra, V. Grover
Summary: This study investigates the Ni1-xCoxO system and its potential for energy storage application. The system exhibits interesting phase transitions and Ni0.5Co0.5O shows enhanced electrochemical performance due to its richer redox chemistry.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Edyta Pesko, Artem Lynnyk, Aldona Zalewska, Roman Puzniak, Anna Krzton-Maziopa, Stanislaw Kus
Summary: The electrochemical intercalation of alkali metal - pyridine adducts into iron selenide matrix was investigated. The charge transfer resistance increased with reaction time, and structural transition was observed. The introduction of guest species and the magnetic and superconducting properties of the samples were confirmed through various experimental techniques.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Petr M. Korusenko, Sergey N. Nesov
Summary: The structure and electrochemical characteristics of composites based on multi-walled carbon nanotubes and manganese oxide with the addition of rhenium oxide have been studied. Decorating the MWCNT surface with manganese oxide provides a significant increase in specific capacitance. However, composites based only on manganese oxide exhibit poor electrochemical behavior. The addition of rhenium oxide significantly enhances the electrochemical properties of the composites.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Ceramics
Bittu Singh, Anshu Tamta, Bhuwan Chandra, N. D. Kandpal, Sharad S. Jadaun, Amrish K. Panwar, K. Vijaya Babu, Ponniah Justin, H. Seshagiri Rao, K. S. K. R. Chandra Sekhar
Summary: A mixed metal oxide, ZnMoO4, was prepared by the solid-state reaction method using hydrothermally synthesized solvents. The structure, morphology, and vibrational modes of ZnMoO4 were characterized using XRD, SEM, and Raman studies. Cyclic voltammetry analysis and electrochemical impedance spectroscopy measurements were conducted to evaluate the electrochemical performance of ZnMoO4 as an anode material in LIBs. The study revealed that the hexagonal-like ZnMoO4 exhibited high capacity and reasonable cycle stability compared to ordinary ZnMoO4. Temperature dependent dielectric studies confirmed a phase transition and revealed different mechanisms associated with temperature regions.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Timo Fuchs, Valentin Briega-Martos, Jan O. Fehrs, Canrong Qiu, Marta Mirolo, Chentian Yuan, Serhiy Cherevko, Jakub Drnec, Olaf M. Magnussen, David A. Harrington
Summary: The initial step of electrochemical surface oxidation involves extracting a metal atom from its lattice site to a location in a growing oxide. Through simultaneous electrochemical and in situ high-energy surface X-ray diffraction measurements, it has been observed that the extraction of Pt atoms from Pt(111) is a fast, potential-driven process, while the formation of adsorbed oxygen-containing species occurs at a slower rate and is not directly coupled with the extraction process. It can be concluded that potential independently plays a key role in electrochemical surface oxidation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Archana Jain, Andrew M. Shore, Subash C. Jonnalagadda, Kandalam V. Ramanujachary, Amos Mugweru
APPLIED CATALYSIS A-GENERAL
(2015)
Article
Chemistry, Physical
S. S. Jyothirmayee Aravind, Kandalam Ramanujachary, Amos Mugweru, Timothy D. Vaden
APPLIED CATALYSIS A-GENERAL
(2015)
Article
Chemistry, Physical
Archana Jain, Subash C. Jonnalagadda, Kandalam V. Ramanujachary, Amos Mugweru
CATALYSIS COMMUNICATIONS
(2015)
Article
Chemistry, Physical
Amos M. Mugweru, Andrew Shore, Helen K. Kahi, Geoffrey N. Kamau
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
(2016)
Article
Chemistry, Analytical
Geoffrey N. Kamau, Zahilis Mazzochette, Helen K. Kahi, Amos Mugweru
Article
Chemistry, Physical
S. S. J. Aravind, Matthew Costa, Victor Pereira, Amos Mugweru, Kandalam Ramanujachary, Timothy D. Vaden
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Multidisciplinary
Joseph A. Naese, Daniel McAteer, Karlton D. Hughes, Christopher Kelbon, Amos Mugweru, James P. Grinias
JOURNAL OF CHEMICAL EDUCATION
(2019)
Article
Engineering, Environmental
Vaishali Krishnadoss, Baishali Kanjilal, Alexander Hesketh, Caleb Miller, Amos Mugweru, Mohsen Akbard, Ali Khademhosseini, Jeroen Leijten, Iman Noshadi
Summary: The demand for wearable bioelectronic devices has led to research in microscale bioelectronics fabrication, where supercapacitors are considered suitable energy sources. A novel material platform based on bio ionic liquid (BIL) functionalized biopolymers allows for in situ 3D printing of implantable soft micro-supercapacitors with hydrogel electrolytes, achieving high performance and biocompatibility for lifelong power sources in flexible bioelectronics structures.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Mahboubeh Nabavinia, Baishali Kanjilal, Noahiro Fujinuma, Amos Mugweru, Iman Noshadi
Summary: Recent research efforts have shown opportunities for capturing and electrochemically converting CO2, with mesoporous metal-doped polymers demonstrating promising CO2 capture performance. The ease of synthesis and high CO2 capture capacity make these materials potential candidates for CO2 capture and possible subsequent electrochemical conversion.
Article
Chemistry, Analytical
Kogila Oke, Amos Mugweru
Summary: LC/TOF/MS was used to investigate the reaction between artemisinin (ART) and DNA bases, revealing that the reaction products increased significantly at 37 degrees C. The main driver of adduct formation was the change in temperature from room temperature to 37 degrees C. The addition of iron (II) ions to DNA base-ART mixtures resulted in new reaction products mediated by a different reaction mechanism.
Article
Chemistry, Analytical
Kogila Oke, Amos Mugweru
Summary: This study found that the breakdown of artemisinin (ART) derivative, artesunate (ARTS), in different solvent systems results in the formation of various derivatives at different rates. The rate of breakdown is affected by the composition of the solvent and temperature.
Article
Electrochemistry
Faraja Obwayo, Zahilis Mazzochette, Amos Mugweru
JOURNAL OF ELECTROCHEMICAL SCIENCE AND ENGINEERING
(2019)
Article
Electrochemistry
Amos Mugweru, Reaz Mahmud, Kartik Ghosh, Adam K. Wanekaya
JOURNAL OF ELECTROCHEMICAL SCIENCE AND ENGINEERING
(2017)
Article
Chemistry, Analytical
Z. Mazzochette, E. Newton, A. Mugweru
ANALYTICAL METHODS
(2017)