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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.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

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Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

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Published on: September 23, 2018

Graphene patchwork.

Goki Eda¹, Manish Chhowalla

¹Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom.

|June 11, 2011

Summary

This summary is machine-generated.

Researchers developed a new method to create long, thin tapes of graphene oxide (GO). These tapes maintain graphene's unique properties, making them suitable for electronics and energy storage applications.

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Area of Science:

Materials Science
Nanotechnology
Chemical Engineering

Background:

Graphene oxide (GO) offers significant potential for applications in large-area electronics, composite materials, and energy storage due to its unique properties.
Current manufacturing methods for GO often struggle to be industrially compatible while preserving its desirable characteristics.

Purpose of the Study:

To introduce a novel, industrially compatible method for the continuous processing of graphene oxide colloidal suspensions.
To produce meter-long tapes of graphene oxide with controlled thickness and preserved properties for advanced applications.

Main Methods:

Development of a continuous processing scheme for colloidal graphene oxide suspensions.
Fabrication of meter-long tapes, tens of micrometers thick, from the processed GO suspension.

Main Results:

The continuous processing method successfully produced long tapes of restacked graphene sheets.
The resulting graphene tapes demonstrated graphite-like mechanical robustness and electrical conductivity.
The tapes successfully retained the high surface area and flexibility inherent to graphene.

Conclusions:

The new method offers a viable pathway for the large-scale, industrial production of graphene oxide tapes.
These tapes are well-suited for applications requiring a combination of mechanical strength, electrical conductivity, high surface area, and flexibility, such as in electronics and energy storage.