24 papers · ranked by Valyu relevance
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…
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…
T. de Ara, B. Olivera, C. Sabater, C. Untiedt
Two factors contribute to the electrical capacitance between two electrodes: a classical contribution, stemming from the electric field, and a quantum contribution, governed by the Pauli exclusion principle, which increases the difficulty of adding charge to the electrodes. In metals, the high electronic Density of…
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…
Pedro M. C. Inácio, Rui Guerra, Peter Stallinga, Alexandru Lavric + 2 more
'Liliana Anchidin' 'Adrian I. Petrariu'] An ultra-low-cost RCL meter, aimed at IoT applications, was developed, and was used to measure electrical components based on standard techniques without the need of additional electronics beyond the AVR® micro-controller hardware itself and high-level routines. The models and…
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…
Gerald S. Manning
An energy barrier model for a membrane yields new biophysical results. Here we explore both the equilibrium and time-dependent Nernst potential, capacitance and resistance, the resting potential, and osmosis.
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…
Yanlin Sui, Tao Yu, Longqi Wang, Zhi Wang + 5 more
'Xin Liu' 'Yongkun Chen' 'Haruo Kobayashi'] In space gravitational-wave-detection missions, inertial sensors are used as the core loads, and their acceleration noise needs to reach $(3\times10-15 \text{ms}-2/\text{Hz})$ at a frequency of $0.1 \text{mHz}$, which corresponds to the capacitive sensing system; the…
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…
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…
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…
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…
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…
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…
Frank V. Kowalski
The decay of the electrical energy in a resistor-vacuum capacitor circuit is shown to involve multiple relaxation processes, with dramatically different time constants. This is measured using a vacuum capacitor to eliminate the effect of a dielectric between the plates (polypropylene capacitors are shown to exhibit…
Bremnen Véliz, Sendey Vera, Sandra Bermejo, Albert Orpella + 2 more
Highlights What are the main findings?1. Kramers-Kronig analysis demonstrates that high permittivity in nanostructured silica metal-insulator-metal capacitors is extrinsic, arising from humidity-induced deviations in linearity and causality. 2. Augmented Transmission Line Modeling identifies moisture-driven ionic…
Zhengliang Wang, Shanfei Chen, Gelin Wang
Based on the energy conversion of the dynamic electric effect from the solid/liquid contact double electric layer is the dynamic electromotive potential, this paper studies the static appearance and the release of the electric field energy of the solid/liquid contact double electric layer, so a special capacitor (P/L/N…
Frank V. Kowalski
circuit: effect of surface charge Authors: ['Frank V. Kowalski'] The relaxation in a vacuum capacitor-resistor circuit is comprised of two exponential decays, one caused by surface charge and the other by the decay of energy stored between the capacitor plates. A simple phenomenological model of this relaxation is…