New Technique for Producing Reactive Metal nanoparticles - Isis Project No 7115

A versatile, environmentally friendly manufacturing route.

Reactive metal nanoparticles

Scientists at the University of Oxford have discovered a new method for producing reactive metal nanoparticles, in large volumes and under environmentally friendly conditions.  The result is a technique which creates smaller particles than many other methods, ideal in applications where a large surface to volume ratio is required, without producing pollutants during the process. The technique has been applied to aluminium, copper and gold and could also be applied to a wide range of other metals.

Competitive advantages

Aluminium nanoparticles produced using the technique

The particle sizes generated using the Oxford method are tuneable and typically under 10nm. Reactivity of the nanoparticles is further enhanced as they are free from oxide.  The synthetic method also offers the potential for scale-up and use in a continuous process, without the need for solvents or resulting in polluting by-products.

Relevant markets

High surface area metal nanoparticles offer advantages in a number of applications, including catalysis, aluminium/air batteries & hydrogen production.  In catalysis, the oxide-free nature of the metal nanoparticles also offers greater reactivity. Recent work in rocket fuels has seen aluminium/water systems used - in this application smaller particles prove more efficient as there is no opportunity for a passivating hydroxide layer to form, thus making full use of the entire metal payload.

Technology maturity

The method has been demonstrated on multi-gram quantities in a batch process, with consideration also being given to use in a continuous operation. The synthetic parameters which affect the size of the nanoparticles have been understood. Exemplification has been carried out with several metals.

Patent Status

The underlying technology is the subject of a UK patent application. Companies interested in progressing the commercial opportunity are invited to contact the Isis Project Manager.

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