POSS Nanoparticles PDA Coating

The POSS nanoparticles were coated with polydopamine (PDA) as described by Kibar et al. [31 ]. 0.25 mg of synthesized POSS nanoparticles were dispersed in 2 mg/mL dopamine hydrochloric (DOPA-HCl, Sigma-Aldrich) containing 10 mL of Tris-Buffer (pH 8.5). The mixture was magnetically stirred for 6 h in a dark hood. The reaction solution changed the color from white to dark. After PDA coating, POSS nanoparticles were collected via centrifugation at 15,000 rpm for 2 min and washed with DI water several times. The collected particles were dried at 50^∘C in a vacuum oven overnight.