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. 2021 Mar 22;13(3):424. doi: 10.3390/pharmaceutics13030424

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Stability and aggregation behaviour of nGO and nGO-PEG nanoparticles in aqueous and culture media solutions. (A) Dynamic light scattering (DLS) experiments for studying the colloidal stability of nGO and nGO-PEG in water: zeta potential, size measurements, and polydispersity index (PDI) of nGO and nGO-PEG for 10 days in aqueous solution. Three independent measurements have been done and the results are represented as MEAN ± STDV. (B) Aggregation analyses of nGO and nGO-PEG in complete cell culture media after five days of incubation under optimal culturing conditions. Images are taken on the first and fifth days with Nikon D700 camera.