The prepared CNPs were characterized by DLS where, the particle size distribution and zeta potential were measured through DLS with Zetasizer Nano S (Malvern, UK). The analysis was carried out at a scattering angle of 90° at a temperature of 25°C using nanoparticles dispersed in deionized distilled water (1 g of sample was dissolved in 25 mL of deionized water and then sonication is done in sonics Vibra cell Sonicator, UK for 15 min). Particle size distribution of the nanoparticles is reported by intensity as previously reported.41
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