Fig. 2

Characterization of the nanoparticles and nanocomposite injectable hydrogel. A Zeta potential of silicate nanoplatelets (SNs), gold nanorods (GNRs), and GNR@SN. B TEM image of GNR@SN (Scale bar: 50 nm). The insert is GNR@SN mixed with PBS after 1 day of resting. C The sol–gel transformation of GNR@SN/Gel. D SEM images of SN/Gel and GNR@SN/Gel (Scale bar: 50 μm). E Swelling ratio of SN/Gel and GNR@SN/Gel. F Dry gel weight reduction of SN/Gel and GNR@SN/Gel. G Temperature dependence of the storage modulus (G′) and loss modulus (G″) of SN/Gel and GNR@SN/Gel. H BSA adsorption test of SN/Gel and GNR@SN/Gel. I Conductivities of different samples