Article
Chemistry, Analytical
Zohreh Hirbodvash, Mohamed S. E. Houache, Oleksiy Krupin, Maryam Khodami, Howard Northfield, Anthony Olivieri, Elena A. Baranova, Pierre Berini
Summary: Lithographically-defined metallic micro-electrodes are investigated experimentally through cyclic voltammetry measurements, generating concentration curves for potassium ferricyanide. The importance of burn-in for stabilizing electrodes is demonstrated, showing its significance before use in electrochemical sensing devices.
Article
Chemistry, Multidisciplinary
Ayesha Kousar, Emilia Peltola, Tomi Laurila
Summary: This study found that biofouling had little effect on the electrochemistry of an outer sphere redox probe [Ru(NH3)(6)](3+), but had a marked effect on an inner sphere redox probe dopamine (DA). Surface geometry played a major role in the extent of fouling, with carbon nanotube/tetrahedral amorphous carbon and carbon nanofiber electrodes being less seriously affected compared to planar pyrolytic carbon.
Article
Engineering, Multidisciplinary
Justyna Lipus, Katarzyna Krukiewicz
Summary: This study aims to point out the challenges and limitations of the current method used to measure charge storage capacity (CSC) and provide a set of guidelines for selecting experimental conditions suitable for reliable analysis.
Article
Chemistry, Physical
Johanna Ranninger, Karl J. J. Mayrhofer, Balazs B. Berkes
Summary: Understanding the role of water in electrocatalysts in different electrolytes is challenging. Small amounts of water promote methanol oxidation in methanol-based electrolytes, while in acetonitrile-based systems, solvent molecules inhibit the formation of an oxide layer at the surface even with up to 1% water concentration.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Dalia L. Swinya, Daniel Martin-Yerga, Marc Walker, Patrick R. Unwin
Summary: The adsorption and electron-transfer kinetics of dopamine on carbon electrodes were investigated in this study. It was found that anodization of glassy carbon electrodes improves the electron-transfer kinetics and provides more adsorption sites for dopamine. However, adsorption takes longer to reach completion on the anodized surface and the extent of adsorption is less compared to the unmodified surface. Additionally, lower graphitic and higher oxygen content on the anodized electrodes suggest that oxygen-containing functional groups may not enhance dopamine adsorption.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Dalia L. Swinya, Daniel Martin-Yerga, Marc Walker, Patrick R. Unwin
Summary: This study investigated the adsorption and electrochemical behavior of dopamine (DA) on carbon electrodes with different structures and compositions using scanning electrochemical cell microscopy (SECCM). The results showed that anodization can enhance the electron-transfer kinetics and adsorption sites of DA, but adsorption takes longer on the anodized surface. In addition, the electrochemical surface area (ECSA) is an important consideration for calculating the surface coverage of DA, and anodization reduces the surface coverage. Lower graphitic and higher oxygen content on anodized carbon electrodes suggest that oxygen-containing functional groups do not necessarily enhance the adsorption of DA.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Electrochemistry
Md Shafiul Islam, Alan J. Branigan, Borkat Ullah, Christopher J. Freeman, Maryanne M. Collinson
Summary: Potentiometric redox sensing in solutions containing multiple redox molecules was evaluated using nanoporous gold-platinum and unmodified nanoporous gold electrodes. The addition of platinum increased the rate of the oxygen reduction reaction and affected the shape of the potentiometric titration curves. Moreover, the sensitivity was enhanced by the addition of platinum.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Environmental
Hao Wang, Haimei Wang, Keliang Wang, Jianyin Xiong, Shaodan Huang, Jack M. Wolfson, Petros Koutrakis
Summary: This study develops a two-layer analytical model to characterize the VOC/SVOC dermal uptake process, and extends it to predict VOC emissions from two-layer building materials or furniture. The key transport parameters of chemicals in every skin or material layer are determined via a hybrid optimization method using data from experiments and literature. The association between the absorption amount of studied chemicals into blood and age is preliminarily investigated, and dermal uptake is found to contribute significantly to the total exposure of examined SVOCs.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Biochemical Research Methods
Albert Leroy, Joan Teixidor, Arnaud Bertsch, Philippe Renaud
Summary: This study successfully quantified dopamine concentrations in droplets using electrochemical techniques on PDMS-fused silica chips prepared with a simple fabrication technique. The unprecedented measurements at low concentrations in T-junction microfluidic chips showed a detection limit of 207 nM, comparable to continuous flow electrochemistry results, demonstrating the usefulness of the method for quantifying microsampled chemicals in droplets.
Review
Chemistry, Physical
Takeshi Kondo
Summary: This review gives an overview of the recent reports on the electroanalytical applications of boron-doped diamond (BDD) electrodes. BDD electrodes are highlighted for their wide potential window, low background current, and resistance to fouling, making them useful for sensitive and stable detection of various substances. Surface modification of BDD electrodes and the combination of peripheral technologies to enhance electroanalytical devices equipped with BDD electrodes are also discussed.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Daniel Carvalho, Sandra Marques, Giorgia Siqueira, Armando Ferreira, Joao Santos, Dulce Geraldo, Cidalia R. Castro, Ana V. Machado, Filipe Vaz, Claudia Lopes
Summary: This study evaluates the lifespan of Ti-Ag dry electrodes prepared using flexible polytetrafluoroethylene (PTFE) substrates. The research finds that higher Ag content results in increased corrosion and reduced lifespan of the electrodes. The long-term performance of electrodes is critical for reliable and sustained monitoring and stimulation in remote biomedical applications like smart wearables.
Article
Chemistry, Multidisciplinary
E. I. Maksyutova, A. V. Sidelnikov, A. G. Mustafin, E. V. Govorov
Summary: Electrochemical methods of analysis are increasingly being used in various industries to improve product quality. This study focuses on sugar and sugar color, proposing a method to differentiate sugars and colors from different manufacturers. This method can be applied in the food industry for rapid analysis of the origin of sugar and other soluble products.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Electrochemistry
Jeanne N'Diaye, Mohamed Elshazly, Keryn Lian
Summary: The TPPS-CNT composite material shows excellent capacitance performance and kinetics, with high cycling stability. The composite material demonstrates great potential in capacitive charge storage.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Henry David Jetmore, Edappalil Satheesan Anupriya, Tanner Joe Cress, Mei Shen
Summary: The interface between two immiscible electrolyte solutions (ITIES) is important in various fields and allows for the detection of complex molecules that are less suited to probing by solid electrodes.
ANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
R. Chandrashekhar, Abhijit A. Yadav
Summary: The doping of cobalt into RuO2 using an aqueous/organic solvent mixture in the spray pyrolysis technique is shown to significantly improve the optical properties and electrochemical performance of RuO2, leading to excellent long-term cyclic stability and high specific capacitance. This study suggests that cobalt-doped RuO2 is a promising material for supercapacitor applications.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Biomedical
Doe Kumsa, Eric M. Hudak, Fred W. Montague, Shawn C. Kelley, Darrel F. Untereker, Benjamin P. Hahn, Chris Condit, Martin Cholette, Hyowon Lee, Dawn Bardot, Pavel Takmakov
JOURNAL OF NEURAL ENGINEERING
(2016)
Review
Medicine, Research & Experimental
Doe Kumsa, G. Karl Steinke, Gregory F. Molnar, Eric M. Hudak, Fred W. Montague, Shawn C. Kelley, Darrel F. Untereker, Alan Shi, Benjamin P. Hahn, Chris Condit, Hyowon Lee, Dawn Bardot, Jose A. Centeno, Victor Krauthamer, Pavel A. Takmakov
Article
Biochemical Research Methods
Ryan Caldwell, Rohit Sharma, Pavel Takmakov, Matthew G. Street, Florian Solzbacher, Prashant Tathireddy, Loren Rieth
JOURNAL OF NEUROSCIENCE METHODS
(2018)
Article
Multidisciplinary Sciences
Hyunsu Park, Pavel Takmakov, Hyowon Lee
SCIENTIFIC REPORTS
(2018)
Article
Electrochemistry
Cory A. Rusinek, Cory A. Rusinek, Yue Guo, Yue Guo, Robert Rechenberg, Robert Rechenberg, Michael F. Becker, Michael F. Becker, Erin Purcell, Erin Purcell, Matthew Verber, Matthew Verber, Collin McKinney, Collin Mckinney, Wen Li, Wen Li
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
Article
Instruments & Instrumentation
Matthew G. Street, Cristin G. Welle, Pavel A. Takmakov
REVIEW OF SCIENTIFIC INSTRUMENTS
(2018)
Article
Chemistry, Multidisciplinary
Matthew W. Glasscott, Matthew D. Verber, Jackson R. Hall, Andrew Pendergast, Collin J. Mckinney, Jeffrey E. Dick
JOURNAL OF CHEMICAL EDUCATION
(2020)
Article
Engineering, Biomedical
Ryan Caldwell, Matthew G. Street, Rohit Sharma, Pavel Takmakov, Brian Baker, Loren Rieth
Article
Multidisciplinary Sciences
James P. Custer, Jeremy D. Low, David J. Hill, Taylor S. Teitsworth, Joseph D. Christesen, Collin J. McKinney, James R. McBride, Martin A. Brooke, Scott C. Warren, James F. Cahoon
Review
Chemistry, Analytical
Erin K. Purcell, Michael F. Becker, Yue Guo, Seth A. Hara, Kip A. Ludwig, Collin J. McKinney, Elizabeth M. Monroe, Robert Rechenberg, Cory A. Rusinek, Akash Saxena, James R. Siegenthaler, Caryl E. Sortwell, Cort H. Thompson, James K. Trevathan, Suzanne Witt, Wen Li
Summary: Carbon-based electrodes, like carbon fiber microelectrodes, have a long history of use in neurochemical sensing, but are limited in fabrication, flexibility, and stability. Boron-doped diamond electrodes offer improved electrochemical properties and biocompatibility, allowing for high-throughput batch fabrication and customization of electrode arrays for neurochemical sensing applications. Opportunities exist to further enhance the performance of diamond electrodes through various methods such as anodic pretreatment and waveform optimization.
Article
Nanoscience & Nanotechnology
Jonathan K. Meyers, Lorenzo Y. Serafin, Andre D. Orr, Collin J. McKinney, James F. Cahoon
Summary: This article introduces a new method for preparing high-quality organic-inorganic hybrid perovskite structures, demonstrating successful application of the method.
Article
Chemistry, Multidisciplinary
Junseo Choi, Zheng Jia, Ramin Riahipour, Collin J. McKinney, Charuni A. Amarasekara, Kumuditha M. Weerakoon-Ratnayake, Steven A. Soper, Sunggook Park
Summary: This study introduces a novel nanosensor that can distinguish different nucleotide molecules in a label-free manner using nanoscale electrophoresis. The sensor utilizes a dual nanopore TOF sensor design to measure transient current on a nanochannel column, achieving high accuracy discrimination.
Article
Materials Science, Multidisciplinary
Eric M. Sussman, Huiyu Shi, Paul A. Turner, David M. Saylor, Jason D. Weaver, David D. Simon, Pavel Takmakov, Shiril Sivan, Hainsworth Y. Shin, Matthew A. Di Prima, Dianne E. Godar
Summary: This study investigated the nickel release from nitinol medical devices under different pH and reactive oxygen species (ROS) conditions. The results showed an increased nickel release at physiological levels of pH and ROS, with the greatest effects observed with decreased pH and increased concentrations of hydrogen peroxide and NaOCl/HOCl. The study highlights the importance of considering the implantation site and understanding the chemical milieu at the device-tissue interface.
SHAPE MEMORY AND SUPERELASTICITY
(2022)
Article
Chemistry, Analytical
Zheng Zhao, Swarnagowri Vaidyanathan, Payel Bhanja, Sachindra Gamage, Subhrajit Saha, Collin McKinney, Junseo Choi, Sunggook Park, Thilanga Pahattuge, Harshani Wijerathne, Joshua M. Jackson, Mateusz L. Huppert, Malgorzata A. Witek, Steven A. Soper
Summary: We present an in-plane extended nanopore Coulter counter (XnCC) chip fabricated using imprinting in a thermoplastic material. The sensor was made using photolithography and focused ion beam milling to create the microfluidic network and in-plane pore sensor, respectively, in Si. UV resin stamps were then generated and used for thermal imprinting to produce the final device in the desired plastic material (cyclic olefin polymer, COP). As a demonstration, we used this in-plane extended nanopore sensor to count SARS-CoV-2 viral particles (VPs) affinity-selected from saliva and extracellular vesicles (EVs) affinity-selected from plasma samples obtained from mouse models exposed to different ionizing radiation doses.
Article
Electrochemistry
Pavel A. Takmakov
ELECTROCHEMICAL SOCIETY INTERFACE
(2017)
