UK’s first liquid gallium SAXS instrument opens in Sheffield

A new £2 million laboratory opening at the University of Sheffield tomorrow will provide Northern Powerhouse scientists with the ability to analyse the structure of nanomaterials in unprecedented detail.

Experiments which previously had to be scheduled many months in advance  at the Diamond Light Source, the UK’s synchrotron facility in Oxfordshire or the European Synchrotron Radiation Facility in Grenoble, France, can now be conducted immediately in Sheffield.

The Soft Matter AnalyticaL Laboratory (SMALL) – part-funded by the Engineering and Physical Sciences Research Council – will use rheology and X-ray scattering techniques to enable faster advances in the study of polymers, soft matter and colloids. This research has applications in industrial sectors as diverse as medicine, energy, chemicals, cosmetics, engine oils, food and electronics.

The centrepiece of the new SMALL facility is a Small Angle X-ray Scattering (SAXS) instrument, built by French company Xenocs, the first of its kind in the UK to use a liquid gallium MetalJet X-ray source. This state-of-the-art design produces a high-intensity X-ray beam that enables scientists to study changes in larger structures over shorter time scales than previously possible.

Senior scientist, Dr Oleksandr Mykhaylyk, who will manage the facility, explains: “Conventional solid metal anodes cannot be easily cooled and can melt if used at high power. Because gallium is liquid at room temperature, this problem is avoided with the MetalJet, producing an X-ray beam that is up to 100 times brighter than our old instrument. This means we can analyse samples within minutes, rather than several hours. The smallest structures that we can study are close to the size of atoms, while the largest structures are up to 700 nm, which is approximately 100 times smaller than the width of a single human hair.”

Professor of Polymer and Colloid Chemistry at the University of Sheffield, Steve Armes says: “This instrument will significantly enhance our soft matter research capability because it will enable Sheffield scientists to perform measurements at their own institution with 24/7 access.”

The new SAXS instrument also enables analysis of the dimensions and structure of thin films, such as semiconductors or the active components of solar cells. “Such measurements were previously only possible at a synchrotron facility, but we can now perform these experiments in Sheffield, instead of waiting for  several months to access specialist equipment elsewhere.“ says Dr Mykhaylyk. “This new SMALL facility will ensure that Sheffield scientists remain at the forefront of research in polymer chemistry, soft matter physics and materials science for the next decade.”

Professor Philip Nelson, Chief Executive, Engineering and Physical Sciences Research Council (EPSRC), said: “The opening of this laboratory represents an important step forward in the study of nanomaterials in the UK. Despite the minute size of the matter that will be analysed, work at SMALL could have a big impact and wide-ranging implications, with potential applications in fields ranging from medicine to energy.

“Funding for SMALL followed an EPSRC Experimental Equipment Call designed to update and upgrade specialist equipment in universities across the UK and support our portfolio of world-class research.”

The laboratory officially opened on October 7, 2016. As well as being available to researchers across the University of Sheffield – a major centre for materials research – this facility will also be open to scientists from the other N8 universities: Leeds, Manchester, Durham, Liverpool, York, Lancaster and Newcastle.