Industry standard

International industrial standard developed for the verification of graphene-based products

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NPL, the National Metrology Institute of the United Kingdom, in collaboration with international partners, announced on March 15 the development of an ISO / IEC standard, ISO / TS 21356-1: 2021, to measure the structural properties of graphene, generally sold in the form of powders or in liquid dispersion. The ISO / IEC standard enables the supply chain to answer the question “What is my material?” ”And is based on methods developed with the University of Manchester (United Kingdom) in the NPL 145 Good Practice Guide.

In recent years, NPL notes, graphene has moved from the laboratory to real-world products such as cars and smartphones (see “Graphene 101: Forms, Properties, and Applications”). However, there is still one barrier affecting the pace of its commercialization, namely understanding the true properties of the material. There is not just one type of material, but several, each with different properties that must be suited to the many different applications where graphene can provide an improvement.

NPL adds that with hundreds of companies around the world selling different materials labeled as “graphene” and manufacturing them in different ways, end users who want to improve their products by incorporating a few layers graphene flakes are unable to compare and subsequently select the right material for their product.

Using standardized methods for reliable and reproducible measurement of properties, such as side flake size, flake thickness, level of disorder and specific surface area, the new ISO / IEC standard will allow industry to compare the many materials available and to build confidence in the supply chain. In conjunction with the ISO / IEC international terminology standard led by NPL, ISO / TS 80004-13: 2017, it will be possible to correctly measure commercially available materials and label them as graphene, few-layered graphene or graphite.

“It is exciting to see this new measurement standard now available to the growing graphene industry around the world,” says Dr Andrew J. Pollard, Science Manager at NPL.Based on rigorous metrological research, this standard will allow companies to confidently compare data sheets for the first time and is the first step towards verified quality control methods.

Overall, NPL has developed and standardized the metrologically robust methods required for the measurement of graphene and associated 2D materials in order to enable industry to utilize these materials and to realize new and improved products in many areas of life. ‘application.

The continuation of the standardization work carried out by the NPL within ISO TC229 (nanotechnologies) will also help determine the chemical properties of 2D materials bound to graphene, as well as the structural properties of different forms of graphene material, such as graphene grown by CVD. These efforts are described in more detail in Nature Physical Notice, including further technical discussions on the new ISO graphene measurement standard.

“Standardization is crucial for the commercialization of graphene in many different applications such as construction, water filtration, energy storage and aerospace,” adds James Baker, CEO of Graphene @ Manchester. “With this international measurement standard, businesses in the UK and beyond will be able to accelerate adoption of this 21st material of the century, now entering many important markets.