Analysis of the effect of low dye concentration for electrical system applications of reactive red 45 dye loaded hydrogels

Öztürk M., COŞKUN R., OKUTAN M. , Yalçın O., Kırsoy A.

Physica B: Condensed Matter, vol.633, 2022 (Journal Indexed in SCI Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 633
  • Publication Date: 2022
  • Doi Number: 10.1016/j.physb.2022.413774
  • Title of Journal : Physica B: Condensed Matter
  • Keywords: Cole-cole plots, Dielectric properties, Impedance circuit, Reactive red 45 dye, Smith chart, UV spectra


© 2022 Elsevier B.V.Structural, optical and dielectric properties determining the conduction mechanism were investigated using appropriate measurement techniques to determine the suitability of low-concentrations (LC) (1000 μL, 500 μL, 250 μL and 125 μL) reactive red 45 (RR-45) dye loaded hydrogels for electrical circuit applications. The UV spectra of the all samples displayed a fluctuating behaviour depending on the concentration. It was found that the dielectric plane plots for all the samples are compatible with the Cole-Cole relaxation model and correspond to an equivalent electrical circuit (RC) representing with the impedance circuit in the Smith Chart. It was concluded that RR-45 dye loaded hydrogels could be a suitable material for electrodes used in electroencephalography and electrocardiography systems due to the decrease of the real part of complex dielectric constant and impedance values with increasing frequency. The s-parameter for the samples, which determines the conductivity mechanism, was calculated separately for different regions.