Home
Resources
Publications
Effect of Ion Concentration, Solution and Membrane Permittivity on Electric Energy Storage and Capacitance

Effect of Ion Concentration, Solution and Membrane Permittivity on Electric Energy Storage and Capacitance

Mohammad Tajparast, Mladen I Glavinović

Biochim Biophys Acta Biomembr. 2018 Nov;1860(11):2385-2403.

PMID: 29885295

Abstract:

Bio-membranes as capacitors store electric energy, but their permittivity is low whereas the permittivity of surrounding solution is high. To evaluate the effective capacitance of the membrane/solution system and determine the electric energy stored within the membrane and in the solution, we estimated their electric variables using Poisson-Nernst-Planck simulations. We calculated membrane and solution capacitances from stored electric energy. The effective capacitance was calculated by fitting a six-capacitance model to charges (fixed and ion) and associated potentials, because it cannot be considered as a result of membrane and solution capacitance in series. The electric energy stored within the membrane (typically much smaller than that in the solution), depends on the membrane permittivity, but also on the external electric field, surface charge density, water permittivity and ion concentration. The effect on capacitances is more specific. Solution capacitance rises with greater solution permittivity or ion concentration, but the membrane capacitance (much smaller than solution capacitance) is only influenced by its permittivity. Interestingly, the effective capacitance is independent of membrane or solution permittivity, but rises as the ion concentration increases and surface charge becomes positive. Experimental estimates of membrane capacitance are thus not necessarily a reliable index of its surface area.

Chemicals Related in the Paper:

Catalog Number	Product Name	CAS Number	Price
AP1020719554	9-Hydroxyrisperidone-D4 solution	1020719-55-4	Price
AP1126623208	Gabapentin-D10 solution	1126623-20-8	Price
AP1184980424	Phenazepam-D4 solution	1184980-42-4	Price
AP1189656641	4′-Hydroxydiclofenac-13C6 solution	1189656-64-1	Price
AP1189980480	Pregabalin-13C3 solution	1189980-48-0	Price
AP1190003634	Amobarbital-D5 solution	1190003-63-4	Price
AP1218911160	Carisoprodol-D7 solution	1218911-16-0	Price
AP136765510	Temazepam-d5 solution	136765-51-0	Price
AP145225032	Oxymorphone-D3 solution	145225-03-2	Price
AP145243976	Secobarbital-D5 solution	145243-97-6	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: