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Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Graphene Coatings for Biomedical Implants

Graphene Coatings for Biomedical Implants

Published on: March 1, 2013

Rivet Graphene.

Xinlu Li¹, Junwei Sha^2,3, Seoung-Ki Lee

¹School of Materials Science and Engineering, Chongqing University , Chongqing 400030, China.

|June 29, 2016

Summary

This summary is machine-generated.

Researchers developed "rivet graphene," a novel hybrid film featuring iron nanoparticles encapsulated in carbon nano-onions. This material offers enhanced conductivity and transparency for flexible electronics, overcoming previous nanoparticle anchoring challenges.

Keywords:

Fe nanoparticles carbon nanotubes hybrid film nano-onions rebar graphene

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Area of Science:

Materials Science
Nanotechnology
Condensed Matter Physics

Background:

Large-area graphene is a key material for flexible and transparent electronics due to its unique properties.
A significant challenge is the stable anchoring of transition metal nanoparticles onto graphene surfaces.

Purpose of the Study:

To develop a method for in situ preparation of nanoparticle-decorated graphene.
To investigate the properties and potential applications of the resulting hybrid material in electronics.

Main Methods:

In situ synthesis of carbon nano-onion-encapsulated Fe nanoparticles on rebar graphene.
Characterization of the hybrid film's structural, optical, electrical, and mechanical properties.
Fabrication and testing of transistors using the developed material.

Main Results:

The hybrid film, termed "rivet graphene," demonstrated polymer-free transfer capability and mechanical robustness (floating on water).
High optical transparency, excellent electrical conductivity, and good charge carrier mobility under strain were observed.
Enhanced charge injection between rivet graphene and metal electrodes was confirmed, improving transistor performance.

Conclusions:

The in situ preparation of carbon nano-onion-encapsulated Fe nanoparticles on rebar graphene offers a viable solution for nanoparticle anchoring.
Rivet graphene exhibits promising properties for advanced transparent and flexible electronic applications.
This approach opens new avenues for utilizing nanocarbon-based films in next-generation electronics.