Figure A1.

Validation of MgCl₂-induced gold nanocube destabilization. UV–Vis spectra of different salt stability experiments of biofunctionalized gold nanocube to validate the aggregation threshold between 10 and 12 mM MgCl₂. Dark blue: 0 Mm MgCl₂, light blue: 8 mM MgCl₂, orange: 10 mM MgCl₂, green: 12 mM MgCl₂, yellow: 14 mM MgCl2. For better comparison, the spectra were normalized to centroid of the sample that was not incubated with salt (0 mM).