25 papers · ranked by Valyu relevance
Steven Brantlov, Leigh C. Ward, Søren Isidor, Christian Lodberg Hvas + 3 more
'Charlotte Lock Rud' 'Lars Jødal' 'Saideh Ferdowsi'] Cell membrane capacitance (Cm) is a potential biomarker that reflects the structural and functional integrity of cell membranes. It is essential for physiological processes such as signal transduction, ion transport, and cellular homeostasis. In clinical practice, Cm…
Orion Ciftja, Jung Sang Cho
Nanocapacitors have received a great deal of attention in recent years due to the promises of high energy storage density as device scaling continues unabated in the nanoscale era. High energy storage capacity is a key ingredient for many nanoelectronic applications in which the significant consumption of energy is…
Vismaya Walawalkar, Md. Sakibur Sajal, Yann Gilpin, Marc Dandin + 1 more
Nanostructures fabricated with DNA are emerging as a practical approach for applications ranging from advanced manufacturing to therapeutics. To support the strides made in improving accessibility and facilitating commercialization of DNA nanostructure applications, we identify the need for a rapid characterization…
Paul Pfeiffer, Federico José Barreda Tomás, Jiameng Wu, Jan-Hendrik Schleimer + 2 more
Dynamics of excitable cells and networks depend on the membrane time constant, set by membrane resistance and capacitance. Whereas pharmacological and genetic manipulations of ionic conductances are routine in electrophysiology, experimental control over capacitance remains a challenge. Here, we present capacitance…
Genady Ragoisha, Yauhen Aniskevich
Capacitance measurements from cyclic voltammetry, galvanostatic chronopotentiometry and calculation of capacitance from imaginary part of impedance are widely used in investigations of supercapacitors. The methods assume the supercapacitor is a capacitor, while real objects correspond to different equivalent electric…
Jamie W. Gittins, Yuan Chen, Stefanie Arnold, Veronica Augustyn + 24 more
Jamie W. Gittins 1 , Yuan Chen2,1 , Stefanie Arnold3,4 , Veronica Augustyn 5 , Andrea Balducci 6 , Thierry Brousse7,8 , Elzbieta Frackowiak 9 , Pedro Gómez-Romero 10 , Archana Kanwade 11 , Lukas Köps 6 , Plawan Kumar Jha 12 , Dongxun Lyu 1 , Michele Meo 13 , Deepak Pandey 14 , Le Pang 15 , Volker Presser 4,3,16 , Mario…
Xinyu Liu, Dongxun Lyu, Céline Merlet, Matthew Leesmith + 4 more
The difficulty in characterizing the complex structures of nanoporous carbon electrodes has led to a lack of clear design principles with which to improve supercapacitors. While pore size has long been considered the main lever to improve capacitance, our study of a large series of commercial nanoporous carbons finds a…
Ivica Smolić, Bruno Klajn
—The capacitance matrix relates potentials and charges on a system of conductors. We review and rigorously generalize its properties, block-diagonal structure and inequalities, deduced from the geometry of system of conductors and analytic properties of the permittivity tensor. Furthermore, we discuss alternative…
Olatoundji Georges Gnonhoue, Amanda Velazquez-Salazar, Éric David, Ioana Preda + 1 more
'Ioana Preda' 'Jin-Hae Chang'] High-voltage capacitors are key components for circuit breakers and monitoring and protection devices, and are important elements used to improve the efficiency and reliability of the grid. Different technologies are used in high-voltage capacitor manufacturing process, and at all stages…
Verena Burtscher, Matej Hotka, Michael Freissmuth, Walter Sandtner
Biological membranes carry fixed charges at their surfaces. These arise primarily from phospholipid head groups. In addition, membrane proteins contribute to the surface potential with their charged residues. Membrane lipids are asymmetrically distributed. Because of this asymmetry the net negative charge at the inner…
Authors not listed
The electrolyte-water-metal interface plays a vital role in electrochemical processes within nanocapacitors and in thermal management in nanoscale devices. Understanding the microscopic origins of thermal transport at these nanomaterial-fluid interfaces is crucial for advancing technologies in areas such as…
Juan Bisquert, Scott T. Keene
The transient behavior of organic electrochemical transistors (OECTs) is complex due to mixed ionic-electronic properties that play a central role in bioelectronics and neuromorphic applications. Some works applied impedance spectroscopy in OECTs for understanding transport properties and the frequency-dependent…
Authors not listed
The impact of pore structure and surface functionality on the capacitance of nanoporous carbons has been widely studied across different electrolytes, yet the role of electrolyte chemistry in structural disorder-driven and ion adsorption capacity-related capacitance remains largely unexplored. In this study, we…
Joseph Santos-Sacchi
Outer hair cell (OHC) nonlinear membrane capacitance (NLC) represents voltage-dependent sensor charge movements within prestin (SLC26a5) that drive OHC electromotility. Dielectric loss, a shift in charge movement phase from purely “capacitive” to “resistive”, is likely indicative of prestin’s interaction with the…
Zheng Chunlin, Wu Fan, Li Cuiling, Peng Wenli + 4 more
This paper first identified the cold resistance of 38 varieties of avocado by determining the semi-lethal low temperature (LT_50_) of the leaves using an electrical conductivity method in combination with a logistic function, and then analyzed the correlation between the LT_50_ of 27 varieties and the capacitance…
Nasim Farajpour, Y. M. Nuwan, D. Y. Bandara, Vinay Sharma + 2 more
The pervasive model for a solvated, ion-filled nanopore is often a resistor in parallel with a capacitor. However, for conical nanopore geometries, we propose the inclusion of a Warburg-like element which is necessary to explain otherwise anomalous observations such as negative capacitance and lowpass filtering of…
Anis Allagui, Ahmed S. Elwakil
The capacitance of capacitive energy storage devices can not be directly measured, but can be estimated from the input and output signals expressed in the time or frequency domains. Here the time-domain voltagecharge relationship in non-ideal electrochemical capacitors is treated as an ill-conditioned convolution…
Zixuan Wei, Joshua Elliott, Athanasios Papaderakis, Robert Dryfe + 1 more
Deciphering the mechanisms of charge storage on carbon-based materials is pivotal for the development of next generation electrochemical energy storage systems. Graphene, the building block of graphitic electrodes, is an ideal model for probing such processes on a fundamental level. Herein, we investigate the…
Joanna Masel
What is an evolutionary capacitor? Many mutations are conditionally neutral: important under some conditions, invisible at other times. Capacitors are on/off switches affecting the visibility of a particular set of conditionally neutral variants. While in the neutral state, ‘cryptic’ genetic variants can drift to high…
Frank V. Kowalski
The process of constructing knowledge is typically taught to students by having them reproduce established results (e.g., homework problems). An alternative pedagogical strategy is to illustrate this process using an open problem, such as voltage decay in an RC circuit as described below. Analyzing data from this…
Eirik Brenner Marthins, Sverre Holm
In an ordinary time-varying capacitor, there is debate whether a timedomain multiplication or a time-domain convolution of capacitance and voltage determines charge. A time-varying capacitor in parallel with a resistor was implemented by a motor-driven potentiometer and op-amps. The response matched a power-law…
Neel Haldolaarachchige, Kalani Hettiarachchilage
Introductory electricity and magnetism lab manual was designed to use with virtual Physics II class. The lab manual consists of experiments on electrostatics, electric potential and energy, current and resistance, DC circuits, electromagnetism and AC circuits. Virtual experiments were based on simulations. Open…
Authors not listed
For the first time a printable, miniaturized and gate-controlled electrochemical capacitor-diode (G-CAPode) is presented. The heart of the device consists of a recently developed asymmetric electrical double-layer capacitor system based on selective, size-depended ion adsorption. Due to the introduction of a sieving…
Maximilian Schalenbach, Hermann Tempel, Rüdiger‐A. Eichel
Differential capacitances (DCAPs) derived from electrostatic Gouy-Chapman-type models for electrochemical double layers (DLs) typically show valley-, bell-, or camel-type profiles as a function of the potential, centered around the potential of zero charge. These DCAP profiles are routinely evaluated with measured…
Elio B. Porcelli, Victo S. Filho
In this work, we analyzed an anomalous effect verified from symmetrical capacitor devices, working in very high electric potentials. The mastery of that effect could mean in the future the possible substitution of propulsion technology based on fuels by single electrical propulsion systems. From experimental…