Fig. 5: Evaluation of anti-bacterial effect and biosafety of the hydrogel material. | Microsystems & Nanoengineering

Fig. 5: Evaluation of anti-bacterial effect and biosafety of the hydrogel material.

From: A tough semi-dry hydrogel electrode with anti-bacterial properties for long-term repeatable non-invasive EEG acquisition

Fig. 5

a Comparison of the appearance of hydrogel electrodes with the original hydrogel electrodes after being worn by the subjects for 3 days. b Appearance of bacterial colonies on the surfaces and inside of the worn hydrogel electrodes after being stored for 1 month at room temperature. c Results of the action of the used control and N40H3 hydrogel electrodes in the LB/NA liquid medium after 24 h. d Changes in OD of the hydrogel electrode suspension in the LB/NA liquid medium with different HACC contents. e Cell proliferation rate of hydrogels with different HACC contents after 3 days of immersion in complete DMEM. f Thickness of granulation tissue after H&E staining of skin tissue for hydrogel action. g Images of hydrogels applied to the dorsal skin of female and male SD rats 1–7 days after application. h Results of H&E staining of skin tissue to which hydrogel was applied (green arrows represent dermis, blue arrows represent nuclei)

Back to article page