Article
Electrochemistry
Mehrnaz Ebrahimi, Mahya Ghorbani, Parviz Norouzi, Ehsan Ghods Rad
Summary: The study successfully determined Ofloxacin using a carbon paste electrode modified by MWCNT@Sm(OH)(3) nanocomposite, achieving high detection sensitivity and selectivity.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Miriam Franco-Guzman, Luis Humberto Mendoza-Huizar, Gabriela Roa-Morales, Carlos Andres Galan-Vidal, Giaan Arturo alvarez-Romero
Summary: This work describes the development of a voltammetric methodology for the electrochemical quantification of diclofenac using a carbon paste electrode enriched with multiwalled carbon nanotubes and TiO2 nanoparticles. The presence of MWCNT and TiO2 nanostructures significantly increased the anodic peak current of diclofenac oxidation. The method showed a LOD of 0.33 mu M, a LOQ of 1.11 mu M, and a sensitivity of 0.487 mu A.mu M-1 within a linear concentration range from 1.1 x 10(-6) to 5 x 10(-3) M.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Mohammad Hassan Motaghedifard, Seied Mahdi Pourmortazavi, Mahdieh Alibolandi, Somayeh Mirsadeghi
Summary: A new electrochemical sensor utilizing noble bimetal nanoparticles for the reduction of nitrate ion was reported. The sensor was designed for nitrate ion measurement at the surface of a modified pencil graphite electrode. The synthesized hybrid nanocomposites showed efficient performance in quantifying nitrate ions in wastewater and aqueduct water.
Article
Chemistry, Analytical
Shijie Ren, Yahui Zhang, Ruimiao Qin, Honggang Xu, Minger Ye, Pengcheng Nie
Summary: In this study, an electrochemical sensor modified with MoS2 nanosheets and carboxylic multiwall carbon nanotubes (MoS2/MWCNT-COOH) was used to detect nitrite. The sensor showed a great response, a wide sensing range, and a low detection limit. The MoS2/MWCNT-COOH-modified electrode demonstrated high sensitivity, good reproducibility, and stability.
Article
Chemistry, Analytical
Chao Chen, Chenxi Wang, Pengcheng Zhao, Jin Zhang, Dechong Ma, Junjie Fei
Summary: The nanocomposite Au@rGO-MWCNT was synthesized through hydrothermal method, and a temperature-controlled composite sensing film was prepared. The sensor exhibits good temperature sensitivity and reversibility to dopamine, turning from an off state to an on state based on the lower critical solution temperature of the polymer. The method provides a new avenue for the application of temperature-sensitive polymers in detecting dopamine.
Article
Chemistry, Analytical
Mitja Kolar, Tilen Oraz, Vasko Jovanovski, Samo B. Hocevar
Summary: In this study, a copper film electrode (CuFE) was developed for sensitive voltammetric detection of nitrophenols. The CuFE demonstrated excellent electroanalytical performance in detecting selected nitrophenols with good sensitivity and repeatability. The practical applicability of this sensor was successfully demonstrated by measuring 2,4-dinitrophenol in a real seawater sample.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Meng-Meng Liu, Feng-Feng Zhang, Hui Liu, Zhou-Jie Liu, Pin-Fang Huang
Summary: A simple and low-cost cell viability and drug evaluation biosensing system was constructed using multi-walled carbon nanotubes, gold nanoparticles, and Nafion modified screen-printed electrode (SPE) biosensor for the detection of dopamine released from living cells and the evaluation of cytotoxicity of antineoplastic drugs. The biosensing system showed exceptional selectivity, sensitivity, and stability in complex bio-samples. The obtained IC50 curves by the biosensing system and tetrazolium colorimetric assay provided similar IC50 value but distinctly different dose-effect relationship, demonstrating the potential of the biosensor in cell viability and drug efficacy profiling.
Article
Materials Science, Multidisciplinary
Gloria E. Uwaya, Omolola E. Fayemi
Summary: In this study, electrochemical sensors for choline detection were fabricated using green-synthesized metal oxides combined with functionalized multi-walled carbon nanotubes. The sensors showed enhanced reactivity towards choline oxidation and were proven to be selective, reproducible, stable, and applicable for real sample sensing in choline dietary supplements.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Multidisciplinary
Mansi Gandhi, Desikan Rajagopal, Annamalai Senthil Kumar
Summary: This study demonstrates a simple electro-organic conversion method for anisole to hydroquinone using a chemically modified electrode, showing excellent electrocatalytic reduction of Cr(vi) species in acidic solution. The surface-confined hydroquinone formation and selective detection of toxic Cr(vi) content in tannery waste water were successfully achieved with a recovery value close to 100%.
Article
Multidisciplinary Sciences
Satiye Korkmaz, Ishak Afsin Kariper, Ceren Karaman, Onur Karaman
Summary: In this study, an aerogel was prepared by sonication of double-walled carbon nanotube and ruthenium chloride, and used to fabricate symmetrical supercapacitor devices for investigating their electrochemical properties. The highest specific capacitance of 423 F/g was achieved for MWCNT/Ruthenium hydroxide aerogels at a scan rate of 5 mV/s. The calculated values from the charge-discharge curves also showed different specific capacitance at different current densities.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Selen Ayaz, Aysem Uzer, Yusuf Dilgin, Resat Apak
Summary: A novel amperometric method was developed for total antioxidant capacity determination using a copper-neocuproine complex modified electrode in a flow injection system. The electrode exhibited good electrocatalytic activity towards polyphenolic compounds and showed a wide linear range and low detection limit. The method was successfully applied to measure antioxidant capacity in herbal teas, providing results comparable to spectrophotometric methods but with improved precision and sensitivity.
Article
Biophysics
B. R. Karishma, G. Manasa, Arvind K. Bhakta, T. Maiyalagan, Ronald J. Mascarenhas, Nagaraj P. Shetti
Summary: P.HCl is an early and commonly used local anesthetic drug, but excessive administration can lead to systemic toxicity. Therefore, it is crucial to develop a sensor for real-time monitoring and quality control of the drug during its industrial preparations. In this study, a simple yet highly selective and sensitive sensor based on BaO-MWCNT/CPE was fabricated for P.HCl detection.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Chemistry, Analytical
Oleg S. Tkachenko, Luana Souza, Monique Deon, Emilene M. Becker, Eliana W. de Menezes, Leliz T. Arenas, Edilson Benvenutti
Summary: The newly developed electrochemical sensor based on carbon nanotubes and modified with a Santa Barbara Amorphous material decorated with silver nanoparticles, showed high sensitivity and fast response time for the simultaneous determination of paracetamol and sulfamethoxazole.
Article
Materials Science, Multidisciplinary
Jagatpati Raiguru, Pitamber Mahanandia, Bidyadhar Subudhi
Summary: The study replaced metal electrode contacts and hole-transporting materials in perovskite solar cells with carbon nanotubes and inorganic semiconductor materials, achieving increased efficiency and stability in the photovoltaic performance.
Article
Chemistry, Multidisciplinary
Iman Abyar, Hamideh Asadollahzadeh, Sayed Zia Mohammadi, Mehdi Shahidi, Mahdieh Ghazizadeh
Summary: In this study, a magnetic core-shell Fe3O4@SiO2/MWCNT nanocomposite was successfully synthesized to construct a selective and sensitive electrochemical 6-TG sensor. The sensor exhibited excellent detection performance in biological matrices.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2023)
Article
Electrochemistry
J. Urzua, C. Yanez, J. Carbajo, J. D. Mozo, J. A. Squella
ELECTROCHEMISTRY COMMUNICATIONS
(2020)
Article
Biochemistry & Molecular Biology
Francisco Jose Ostos, Jose Antonio Lebron, Maria Luisa Moya, Eva Bernal, Ana Flores, Cristian Lepori, Angeles Maestre, Francisco Sanchez, Pilar Lopez-Cornejo, Manuel Lopez-Lopez
Summary: The study showed that the adsorption process of carbon nanotubes with surfactants is cooperative, with hydrophobic interactions being crucial. Electrostatic interactions mainly influence the dispersion of CNTs, while hydrophobic interactions also play a role.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Analytical
R. Moscoso, A. Alvarez-Lueje, J. A. Squella
MICROCHEMICAL JOURNAL
(2020)
Article
Chemistry, Analytical
G. Contreras, C. Barrientos, R. Moscoso, A. Alvarez-Lueje, J. A. Squella
MICROCHEMICAL JOURNAL
(2020)
Article
Pharmacology & Pharmacy
Jose Antonio Lebron, Pilar Lopez-Cornejo, Elena Garcia-Dionisio, Pablo Huertas, Margarita Garcia-Calderon, Maria Luisa Moya, Francisco Jose Ostos, Manuel Lopez-Lopez
Summary: The tendency of surfactants to self-aggregate plays a key role in determining their efficiency for compacting nucleic acids, with 12NBr showing the most effectiveness as a DNA compacting agent. Lipoplexes of DOPE/12NBr/pEGFP-C1 were prepared and characterized, with investigations into their cytotoxicity and transfection efficiency.
Article
Chemistry, Analytical
Maria Luisa Moya, Francisco Jose Ostos, Izamar Moreno, Diandra Garcia, Paula Moreno-Gordillo, Ivan V. Rosado, Pilar Lopez-Cornejo, Jose Antonio Lebron, Manuel Lopez-Lopez
Summary: Researchers have investigated the potential applications of cationic metallo-liposomes in gene transfection and drug delivery by preparing and characterizing nanostructures. The results demonstrate the successful internalization of these nanostructures into cells, as well as the successful encapsulation of doxorubicin into metallo-liposomes.
Article
Pharmacology & Pharmacy
Jose Antonio Lebron, Manuel Lopez-Lopez, Clara B. Garcia-Calderon, Ivan V. Rosado, Fernando R. Balestra, Pablo Huertas, Roman V. Rodik, Vitaly I. Kalchenko, Eva Bernal, Maria Luisa Moya, Pilar Lopez-Cornejo, Francisco J. Ostos
Summary: The study investigated the formation of calixarene-based liposomes and their characterization using various techniques. The results showed that liposomes formed with the least cytotoxic calixarene were used as nanocarriers for nucleic acids and an antineoplastic drug. The study also found that the encapsulation efficiency of doxorubicin in these liposomes was high and they exhibited a slow controlled release, potentially reducing the side effects of the drug.
Article
Electrochemistry
C. Barrientos, R. Moscoso, S. Moris, J. A. Squella
Summary: In this study, three new nitroaromatic compounds were synthesized and electrochemically studied on nanostructured electrodic platforms. It was found that these compounds were easily reducible, generating stable redox mediator couples.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Jose Antonio Lebron, Manuel Lopez-Lopez, Maria Luisa Moya, Mary Deasy, Ana Munoz-Wic, Clara Beatriz Garcia-Calderon, Ivan Valle Rosado, Pilar Lopez-Cornejo, Eva Bernal, Francisco Jose Ostos
Summary: Gene therapy is a promising technique that can change genes to treat diseases. A specific compound studied in this research can be used as a nanovector in gene therapy and interacts with DNA to alter its conformation, thereby improving the efficacy of drugs against tumors.
Article
Electrochemistry
R. Moscoso, S. Abarca, C. Yanez, J. A. Squella
Summary: We compare the modification of a glassy carbon electrode (GCE) with multiwalled carbon nanotubes (MWCNTs) and nitroaromatic compounds using two different methods: drop casting (DC) and buckypaper disc film (BP). The results show that the BP method significantly improves the reproducibility of the electrode's electrochemical response compared to the DC method.
ELECTROCHIMICA ACTA
(2023)
Article
Pharmacology & Pharmacy
Cecilia Espindola, Alejandro Javier Correa, Manuel Lopez-Lopez, Pilar Lopez-Cornejo, Eva Bernal, Jose Antonio Lebron, Francisco Jose Ostos, Mohammed Rafii-El-Idrissi Benhnia, Maria Luisa Moya
Summary: Research on flavonoids has grown significantly since their first therapeutic evidence in 1937. They have shown effective antioxidant activity in a wide range of human diseases. However, their applications have been limited due to their low solubility, poor absorption, and rapid metabolism. Encapsulating flavonoids in nanocarriers, such as carbon nanotubes, can improve their oral absorption and stability. This study investigated the encapsulation of 7-hydroxyflavone (7-HF) in different types of carbon nanotubes and studied its release at different pHs, simulating biological barriers.
Article
Electrochemistry
R. Moscoso, C. Barrientos, S. Abarca, J. A. Squella
Summary: All four synthesized nitrocoumarins were used to prepare nanostructured multiwalled carbon nanotube (MWCNT) electrode platforms, which were electrochemically activatable to generate the redox pair ArNHOH/ArNO for NADH oxidation. Nitrocoumarin-modified platforms prepared by drop casting and buckypaper methods showed similar electrochemical responses. 4-Cin-6-Coum was most easily reduced, with reduction occurring at the 4-nitrocinnamoyl group. The heterogeneous transfer rate constant, kh, followed the order 4-CinCoum> 3-CinCoum> 6-Coum> 4-Cin-6-Coum. The retention of the redox pairs ArNHOH/ArNO on the electrode ranged from 79.6% to 91.6%. Nanostructured platforms with nitrocoumarins could be used to develop an amperometric sensor for NADH determination, with LODs of 2.95 mu M and 3.43 mu M for 6-Coum and 4-Cin-6-Coum, respectively.
ELECTROCHIMICA ACTA
(2023)