A New Approach to Obtaining Nano-Sized Graphene Oxide for Biomedical Applications

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Graphene oxide (GO) is a widely utilized material with significant potential.
• Developing tailored nanomaterials is crucial for advanced applications.
• Controlling GO's size and properties is key to unlocking its full capabilities.

Purpose of the Study:

• To present a novel method for producing size-controlled nano-graphene oxide (n-GO).
• To characterize the properties of the synthesized n-GO, focusing on size, functional groups, and biocompatibility.
• To evaluate the potential of n-GO as a carrier for systemic administration.

Main Methods:

• Utilized a unique sequence of ultrasonication in dimethyl sulfoxide (DMSO).
• Controlled n-GO sheet sizes by adjusting ultrasonication time to manage cutting and re-aggregation.
• Analyzed spectral changes to confirm the preservation of oxygen functionalities and absence of reduction.
• Assessed biocompatibility through cytotoxicity assays, determining the half-maximal effective concentration (EC50).

Main Results:

• Successfully produced n-GO sheets with sizes down to 200 nm and high homogeneity.
• Confirmed that the n-GO retained its original oxygen functionalities, with only minor S-containing group formation.
• Demonstrated significantly enhanced biocompatibility, with a 5-fold increase in EC50 (from 50 to 250 µg/mL).
• Observed no disturbance to blood flow or toxic influence on surrounding cells.

Conclusions:

• The developed method yields size-controlled, homogeneous n-GO with preserved functionalities.
• The enhanced biocompatibility and non-thrombogenic properties make n-GO a promising candidate for biomedical applications.
• n-GO is a viable material for developing advanced drug and biomolecule delivery systems for systemic administration.