Helium Ion Microscopy: The difference 7,362 makes
Biomedical Engineering Boardroom
Ground Floor, 203 Bouverie Street
The helium ion microscope (HIM) is a scanned ion probe instrument that is similar in many respects to that of the well-established scanning electron microscope (SEM). Fundamentally, however, the two differ in that the HIM utilises a beam of He+ ions generated from a gas field ion source (GFIS). This affords beam characteristics superior to that of an electron source; very low chromatic aberration, orders of magnitude higher brightness, greater depth of field, an ultimate imaging resolution that is not diffraction limited and is applicable to insulators without a coating. Unsurprisingly then, the HIM may be destined to become an important imaging tool in the materials and life sciences, where there is an ever-pressing demand to look closer at surfaces and elucidate the finest nanoscale features.
At the University of Melbourne’s Materials Characterisation and Fabrication Platform (MCFP) we host the Zeiss ORION NanoFab HIM, one of only 4 in Australia. This seminar will introduce and discuss the technique, its strengths (and weaknesses) and will discuss current applications including imaging cells, milling plasmonic devices, lithography on polymer resists, and nanoscale helium ion dosing and defect creation.
Dr Anders Barlow, Academic Specialist within the Materials Characterisation & Fabrication Platform (MCFP)
Dr Anders Barlow
Academic Specialist within the Materials Characterisation & Fabrication Platform (MCFP)
The University of Melbourne
Dr Anders Barlow is an Academic Specialist within the Materials Characterisation & Fabrication Platform (MCFP) at The University of Melbourne where he manages the helium ion microscopy (HIM) node alongside other synergistic instruments. Dr Barlow was awarded his PhD in 2012 from Flinders University where he studied the surface functionalisation of carbon nanomaterials using plasma, applying surface analysis methods to gain a mechanistic understanding of the surface reactions. From 20122016 he held a Research Fellow position at Newcastle University, UK, at the National EPSRC XPS Users’ Service (NEXUS) where he managed a suite of surface analysis instrumentation alongside a HIM. Dr Barlow returned to Australia in 2016 where he joined the La Trobe University Centre for Materials and Surface Science, and in 2018 joined the University of Melbourne MCFP. Dr Barlow’s primary research interest lies in instrument and multitechnique development, leveraging the strengths of multiple techniques against oneanother to achieve solutions for challenging research questions.