Versarien announces launch of new graphene-based superparamagnetic material
Forest of Dean-based advanced engineering materials group Versarien has released a new graphene-based hybrid nanomaterial with superparamagnetic properties to be used in a range of applications including defence and healthcare.
The superparamagnetic material combines graphene with both iron oxide and manganese oxide nanoparticles which provide the material with magnetic properties. Simultaneously, the graphene provides electric conductivity to the electrically-insulating metal oxides.
Superparamagnetism is a form of magnetism which appears in small magnetic nanoparticles. In the absence of an external magnetic field (i.e. a magnet) they appear to have zero magnetization; when this occurs, they are said to be in a superparamagnetic state. In this state the application of a magnetic field magnetizes the particles. One might think of it like dormant magnetism ready to be awakened by the introduction of a magnet.
Magnetic nanocomposites combine these nanoparticles with other materials, imbuing them with specific extra properties the particles alone lack. They readily respond to external magnetic fields allowing them to be manipulated.
Potential applications of the new material include the treatment of wastewater whereby pollutants are adsorbed onto the graphene surface. The material also lends itself to biomedical and biotechnology applications, or defence applications requiring the shielding of electromagnetic fields. Magnetic manipulation could allow the recovery and recycling of the graphene, something that could not be done with normal graphene compounds.
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Versarien CEO, Neill Ricketts, said: "Our superparamagnetic material is the next product for Versarien to launch with its focus on providing efficient and sustainable solutions. Our research and development teams across the Group have been working over the last few years to optimise the use of graphene, and we're pleased to be bringing the next phase of graphene materials to market."
The development of the material has been led by Versarien's 62% owned subsidiary, Gnanomat S.L., whose research has led the generation of a new family of versatile nanocomposites based on graphene and other forms of carbon, combined with metal or metal oxide nanoparticles typically intended for energy storage applications.
Roberto Clemente, CEO of Gnanomat, said: "We believe this is the beginning of the next wave of nanomaterials. Using graphene combined with metal oxides, there are countless opportunities to change the way we view a number of industries. This superparamagnetic material is just the first step in an extensive line of innovation to come."
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