Article
Chemistry, Physical
Sujin Kim, Dongryul Lee, Kyungmin Ahn, Jihyun Kim, Jungbae Kim
Summary: Remote SF6 plasma treatment is used to graft hydrophobic fluorine on the surface of CNTs, allowing for the adsorption of enzyme molecules. The loading of GOx on F-CNTs is correlated with plasma treatment time, with shorter treatment times leading to lower Rct values and increased sensitivity. Extending the treatment time results in increased resistance and sensitivity due to the dominance of covalently-attached fluorine.
APPLIED SURFACE SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Xiaoping Huang, Yufang Zhu, Ehsan Kianfar
Summary: A sensor is a tool that measures test compounds in a sample directly, with nanosensors specifically using nanostructures for detection. Biological sensors utilize biological elements for detection, while the simultaneous use of nanostructures and electrochemical techniques has led to the development of sensors with high sensitivity and decomposition capabilities.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Electrochemistry
Felix Ansah, Francis Krampa, Jacob K. Donkor, Caleb Owusu-Appiah, Sarah Ashitei, Victor E. Kornu, Reinhard K. Danku, Jersley D. Chirawurah, Gordon A. Awandare, Yaw Aniweh, Prosper Kanyong
Summary: The study presents label-free DNA-based genosensors for species-specific detection of malaria parasites. The genosensors showed high sensitivity and comparable specificity to current POC diagnostic tools for malaria. This work brings significant progress towards the development of accurate and rapid nucleic acid-based toolkits for malaria diagnosis at the POC.
ELECTROCHIMICA ACTA
(2022)
Review
Chemistry, Analytical
Constanza J. Venegas, Soledad Bollo, Paulina Sierra-Rosales
Summary: This review provides a summary of the methods and results using carbon-based electrochemical (bio)sensors for detecting carbendazim in environmental and food samples. The focus is on the role of carbon nanotubes, carbon nitride, graphene, and its derivatives, and carbon-based materials as modifiers, along with the evaluation of analytical performance.
Article
Chemistry, Analytical
HuanWen Han, Kazuyuki Nobusawa, Ichiro Yamashita
Summary: The DNA intercalator [Ru(bpy)(2)DPPZ](2+) was found to significantly increase charge transfer in electrochemical impedance spectroscopy (EIS), making it a promising candidate for applications in dsDNA detection or PCR monitoring. Future developments may lead to EIS sensors that do not require specific electrode modifications.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Chittatosh Pal, Subrata Majumder
Summary: The feasibility of designing a highly selective and sensitive label-free biosensor for the determination of Hg2+ ions using gold electrodes functionalized with DNA-wrapped carbon nanotubes was examined. The detection limit of 1 femtomolar was achieved, and the method showed good selectivity against common metal cations.
Review
Chemistry, Analytical
Benhui Dai, Ruiyun Zhou, Jianfeng Ping, Yibin Ying, Lijuan Xie
Summary: This article discusses the use of carbon nanotubes (CNTs) in biosensors to improve their performance. The unique properties of CNTs, such as larger surface area and faster electron transfer, enhance the sensitivity and efficiency of biosensors. The article provides detailed descriptions of CNT-based sensors for detecting glucose, DNA, proteins, amino acids, and neurotransmitters. Continuous improvement in materials and structures can further enhance the detection performance of these sensors.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Irena Levin, Aurel Radulescu, Lucy Liberman, Yachin Cohen
Summary: This research aims to characterize the adsorption morphology of block copolymer dispersants of the styrene-block-4-vinylpyridine family (S4VP) on the surface of multi-walled carbon nanotubes (MWCNT) in a polar organic solvent, N,N-dimethyl formamide (DMF). The results show that the block copolymers adsorb onto the MWCNT surface as a continuous coverage of low polymer concentration. Increasing the PS molecular weight increases the thickness of the adsorbed layer but decreases the overall polymer concentration within it. These results are relevant for the ability of dispersed CNTs to form a strong interface with matrix polymers in composites, due to the extension of the 4VP chains allowing for entanglement with matrix chains.
Article
Multidisciplinary Sciences
Jack Hu, Fareeha Safir, Kai Chang, Sahil Dagli, Halleh B. Balch, John M. Abendroth, Jefferson Dixon, Parivash Moradifar, Varun Dolia, Malaya K. Sahoo, Benjamin A. Pinsky, Stefanie S. Jeffrey, Mark Lawrence, Jennifer A. Dionne
Summary: Genetic analysis methods are crucial for personalized medicine, disease diagnostics, and ecosystem monitoring. This study presents a label-free genetic screening platform using high-Q silicon nanoantennas, enabling quantitative and specific detection of gene fragments with femtomolar sensitivity within 5 minutes. The highly-multiplexed detection potential and amplification-free nature of this technology provide a foundation for rapid molecular assays.
NATURE COMMUNICATIONS
(2023)
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
Biochemical Research Methods
Mark Friedel, Benjamin Werbovetz, Amy Drexelius, Zach Watkins, Ahilya Bali, Kevin W. Plaxco, Jason Heikenfeld
Summary: The ability to continuously collect diagnostic information from the body during daily activity has revolutionized health and disease monitoring. This study presents the first report of real-time human molecular data collected using electrochemical aptamer sensors, demonstrating their ability to measure the concentration of phenylalanine in dermal interstitial fluid after an oral bolus. The study also achieves an important milestone in moving such sensors to the clinic by demonstrating 90 days dry room-temperature shelf storage.
Article
Chemistry, Analytical
Fabrizio Perrachione, Pablo R. Dalmasso, Fabiana A. Gutierrez, Gustavo A. Rivas
Summary: This study presents an electrochemical sensor using double-walled carbon nanotubes modified with garlic extract for the selective and sensitive quantification of lead(II) in environmental water samples. The sensor showed high sensitivity, reproducibility, and selectivity even in the presence of other ecotoxicologically relevant cations. It was successfully applied for the quantification of lead(II) in river and lagoon water.
MICROCHEMICAL JOURNAL
(2021)
Article
Physics, Multidisciplinary
Camile Rodolphe Tchenguem Kamto, Bridinette Thiodjio Sendja, Marius Silenou Mengoue, Nahum Medelin Castillo, Gladis Judith Labrada Delgado, Margarita Berenice Najera-Acevedo, Jeannot Mane Mane
Summary: The electronic structure of potassium adsorbed single-walled carbon nanotubes (SWCNTs) was investigated by X-ray near edge structure (XANES) spectroscopy. The charge transfer effect in K-doping SWCNTs increased the conductivity to 62.7%. Adsorption study showed that removing potassium from aqueous solutions using SWCNTs is similar to the ion exchange process.
Article
Chemistry, Multidisciplinary
Sara Bracaglia, Simona Ranallo, Francesco Ricci
Summary: Research scientists have developed programmable antigen-conjugated gene circuits that can detect target antibodies and trigger the production of detectable RNA sequences using a disposable electrochemical sensor. This cell-free electrochemical biosensor enables sensitive, specific, selective, and multiplexed detection of different antibodies in blood serum.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Electrochemistry
Xin-Xin Ma, Yang-Yang Li, Xin-Yan Song, Ke-Xin Xu, Yu-Jie Chen, Xin Meng, Yu-Ying Li, Lin-Lin Ma, Ali Akbar Moosavi-Movahedi, Jun Hong, Bao-Lin Xiao
Summary: A glucose biosensor based on NF, GOx, MWCNTs, and HFs is developed for monitoring blood glucose levels. The modification materials and electrochemical properties of the electrodes are studied using different characterization techniques. The biosensor exhibits a high sensitivity to glucose with excellent storage stability and anti-interference capability.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Boryana Borisova, Alfredo Sanchez, Sandra Jimenez-Falcao, Miriam Martin, Pedro Salazar, Concepcion Parrado, Jose M. Pingarron, Reynaldo Villalonga
SENSORS AND ACTUATORS B-CHEMICAL
(2016)
Article
Chemistry, Analytical
Alejandro Gutierrez, Emiliano N. Primo, Marcos Eguilaz, Concepcion Parrado, Maria D. Rubianes, Gustavo A. Rivas
MICROCHEMICAL JOURNAL
(2017)
Article
Chemistry, Analytical
Alberto Sanchez Arribas, Monica Moreno, Gabriel A. Moreno, Esperanza Bermejo, Antonio Zapardiel, Manuel Chicharro
Article
Chemistry, Analytical
Alberto Sanchez Arribas, Monica Moreno, Laura Gonzalez, Noelia Blazquez, Esperanza Bermejo, Antonio Zapardiel, Manuel Chicharro
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Analytical
Monica Moreno, Alberto Sanchez Arribas, Laura Gonzalez, Esperanza Bermejo, Antonio Zapardiel, Manuel Chicharro
Summary: This study presents a simple electroanalytical methodology for classification of wine samples based on their grape variety using flow injection analysis with electrochemical detection and chemometric analysis. The modified GCE electrode with CNT film showed excellent electrochemical performance for amperometric detection of polyphenols, allowing high sample throughput analysis of white wines. The developed discriminant analysis model using amperometric signals successfully assigned the grape varietal of the analyzed samples with a high mean classification rate of 97.0% in validation assays.
MICROCHEMICAL JOURNAL
(2021)
Review
Materials Science, Multidisciplinary
Monica Moreno, Alberto Sanchez Arribas, Esperanza Bermejo, Antonio Zapardiel, Manuel Chicharro
APPLIED MATERIALS TODAY
(2017)
Article
Biophysics
Eloy Povedano, Fernando H. Cincotto, Concepcion Parrado, Paula Diez, Alfredo Sanchez, Thiago C. Canevari, Sergio A. S. Machado, Jose M. Pingarron, Reynaldo Villalonga
BIOSENSORS & BIOELECTRONICS
(2017)
