Applied Graphene Materials plc

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Graphene nanoplatelets

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Graphene was first isolated in 2004 by Andre Geim and Konstantin Novoselov at The University of Manchester. They used sticky tape to remove single layers from the surface of graphite and deposit them onto a silicon wafer. The isolation of graphene was a breakthrough for which Geim and Novoselov ultimately won the 2010 Nobel Prize for Physics.

In its purest form Graphene has a molecular structure comprising of a single layer of carbon atoms bonded in a hexagonal structure. Graphene possesses an unsurpassed combination of mechanical, electrical and thermal properties.

Graphene nanoplatelets are stacks of graphene sheets in a two dimensional nano particulate format and their properties are lower than those of a single-layer graphene. However, graphene nanoplatelets can be dispersed into other materials to enhance their properties.

AGM’s Applied Graphene NanoPlatelets (A-GNPs) are manufactured using a proprietary ‘bottom-up’ process that is proven to be consistent and scalable over a range of suitable material formats and structures.

We do not start with graphite nor use any oxidation procedures during graphene production and therefore our graphene is almost completely free of graphitic impurities, graphene oxide or transition metals. This makes our graphene suitable for a wide range of applications.

A-GNPs vary in number of atomic layers but typically have a 1-10nm thickness with 1-15µm lateral diameter, resulting in aspect ratios up to 1:1000 and surface areas up to 700m2/g.

Employing the correct application processes, A-GNPs have the potential to significantly enhance the performance of an array of materials in terms of their mechanical, barrier, thermal, lubricating and electrical properties.

We believe that the commercial value of graphene lies in the ability to robustly transfer its intrinsic properties into other materials, thus creating higher value materials and products which possess specifically enhanced characteristics.

TYPICAL A-GNP Graphene Nanoplatelets

PropertyA-GNP10A-GNP35
Appearance Low density black powder Ultra-low density black powder
Carbon Content (%) 85 95
Oxygen Content (%) 15 5
Apparent Density (g/cm3) 0.06 0.004
Electrical Resistivity (Ohm.m) N/A V Good

A-GNP10

  • Composed of a mixture of nanoplatelet type sheets

  • Excellent barrier properties

  • Moderate density and surface area gives high loading levels in most matrices

  • Typically 10% in dispersion for further dilution in final formulation

A-GNP35

  • Very thin, crumpled sheets (of 5-15 atomic layers)

  • Very low density and high surface area, enabling enhanced corrosion prevention

  • Typical loading levels 0.5-1% by weight in dispersion for further dilution in final formulation

NOTE:

Other A-GNP product formats are available, please contact AGM sales office for more information specific to your requirements.

AGM supplies all graphene in dispersion format.

Please visit the Products and Applications section of website for more details.