Structure, Properties, Functionalization, and Applications of Carbon Nanohorns

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Carbon nanohorns (CNHs) are conical nanostructures made from sp(2) carbon sheets.
• They are synthesized without metal catalysts and produced in industrial quantities.
• CNHs offer an alternative to carbon nanotubes and graphene for various applications.

Purpose of the Study:

• To review the structure, synthesis, topology, and chemistry of carbon nanohorns.
• To highlight the challenges in CNH research, particularly cluster aggregation.
• To introduce a novel method for separating aggregated CNHs.

Main Methods:

• Review of existing literature on carbon nanohorn synthesis and properties.
• Description of the aggregation phenomenon in synthesized CNHs.
• Presentation of a new technique for de-aggregating CNH clusters.

Main Results:

• Carbon nanohorns possess unique conical morphology and properties.
• Aggregation into ~100 nm clusters has hindered individual nanocone functionalization.
• A new separation approach successfully breaks down these clusters into individual CNHs.

Conclusions:

• Overcoming CNH aggregation unlocks their full potential for applications.
• Individualized carbon nanohorns are now amenable to functionalization and treatment.
• This advancement paves the way for broader CNH utilization in nanotechnology.