Fig. 2
From: Spike structure of gold nanobranches induces hepatotoxicity in mouse hepatocyte organoid models
Characterizations of GNSs and GNBs. (a) TEM image of the GNSs, with a schematic representation in the upper right corner. (b) TEM image of GNBs with a schematic representation in the upper right corner. (c) Zeta potential graphs show the even dispersion of GNSs and GNBs in different solutions (PBS and DMEM). (d) Extinction spectra of GNSs and GNBs. (e) Particle size distribution of GNSs. (f) Particle size distribution of GNBs. (g) The spikiness of GNSs (δ = 0) and GNBs (δ = 3). (h,i) FDTD simulations of the GNS (h) and GNB (i), electric field enhancement contours simulated at the plasmon resonance wavelengths under the axial/longitudinal and transverse excitation polarization directions, respectively