Visualization of electrical field of electrode using voltage-controlled fluorescence release

Abstract

In this study we propose an approach to directly visualize electrical current distribution at the electrode-electrolyte interface of a biopotential electrode. High-speed fluorescent microscopic images are acquired when an electric potential is applied across the interface to trigger the release of fluorescent material from the surface of the electrode. These images are analyzed computationally to obtain the distribution of the electric field from the fluorescent intensity of each pixel. Our approach allows direct observation of microscopic electrical current distribution around the electrode. Experiments are conducted to validate the feasibility of the fluorescent imaging method.

Cytoelectric Coupling: Electric fields sculpt neural activity and “tune” the brain’s infrastructure.

“…Besides synaptic and intrinsic currents, the fields depend on microscopic processes like gap-junction activity and neuron-glia interactions. They also depend on large scale properties, like the inhomogeneity of extracellular tissue and the anatomy of grey matter [5][6][7][8] . In brief, knowing the brain's anatomy, it is possible to understand properties of emerging electric fields.Here, we aim to understand the reverse: How the fields influence individual neurons.…”

Microwave-induced high dispersion anchoring of MOFs on SiC surfaces: Built-in electric field dominated process

“…The doped NDI-MOF lm can be reversibly switched between an oxidized state and a reduced state accompanied by the movement of dopant ions in and out of the polymer lm for charge compensation. Upon the application of an electrical eld, NDI-MOF was reduced to NDI free radical, expelling uorescein anions from the NDI-MOF lm 34,35,36 . Therefore, the electric eld enhancement effect on the surface of SiC particles can be veri ed by observing the escape behavior of uorescein on the surface of the lm and the content of NDI radicals.…”