penicillin/streptomycin, biotinylated BSA, and streptavidin were purchased
from Thermo Fisher Scientific (Massachusetts, US). Geneticin sulfate
was purchased from Capricorn Scientific (Ebsdorfergrund, Germany).
Culture 6 channel μ-Slide #1.5 glass bottom was purchased from
Ibidi (Gräfelfing, Germany). Polystyrene nanoparticles of 340
nm were purchased from Spherotech (Illinois, US). Gold nanoparticles
of 80 nm were purchased from Sigma-Aldrich (Missouri, US).