5 papers · 1 filter
Voltage dynamics of spherical membranes from single ion channel currents
Sirui Ning, Joshua B. Fernandes, Karthik Shekhar +1
Ion channels and pumps drive ion-selective currents through cell membranes at localized sites, yet a cell's electrical state is routinely summarized by a single transmembrane volta…
Interfacial mass transfer resistance at fluid-fluid interfaces
Hyeongjoo Row, Brandon J. Wallace, Joshua B. Fernandes +2
Complex chemistry in nano- and microscale compartments is often governed by how quickly reagents transit a fluid-fluid interface. Mass transport across interfaces is commonly model…
Electrochemical response of biological membranes to localized currents and external electric fields
Joshua B. Fernandes, Hyeongjoo Row, Kranthi K. Mandadapu +1
Electrochemical phenomena in biology often unfold in confined geometries where micrometer- to millimeter-scale domains coexist with nanometer-scale interfacial diffuse charge layer…
Capacitive response of biological membranes
Jafar Farhadi, Joshua B. Fernandes, Karthik Shekhar +1
We present a minimal model to analyze the capacitive response of a biological membrane subjected to a step voltage via blocking electrodes. Through a perturbative analysis of the u…
Spatiotemporal dynamics of ionic reorganization near biological membrane interfaces
Hyeongjoo Row, Joshua B. Fernandes, Kranthi K. Mandadapu +1
Electrical signals in excitable cells involve spatially localized ionic fluxes through ion channels and pumps on cellular lipid membranes. Common approaches to understand how these…