6 papers
High resolution large working distance scanning helium microscopy
Sam M Lambrick, Nick A von Jeinsen, Alek RadiÄ +3
Scanning helium microscopy (SHeM) is attractive for imaging delicate and insulating surfaces because it combines a non-destructive neutral-atom probe with strong surface sensitivit…
Characterising Atomic-Scale Surface Disorder on 2D Materials Using Neutral Atoms
Chenyang Zhao, Sam M. Lambrick, Ke Wang +5
Two-dimensional (2D) transition metal dichalcogenides (TMDs), such as MoS2, have the potential to be widely used in electronic devices and sensors due to their high carrier mobilit…
Measuring vacancy-type defect density in monolayer semiconductors
Aleksandar Radic, Nick von Jeinsen, Vivian Perez +12
Two-dimensional (2D) materials have attracted wide-spread interest due to their unique and tunable properties. Their optoelectronic, mechanical, and thermal properties are greatly…
Heliometric stereo: a new frontier in surface profilometry
Aleksandar Radic, Sam Lambrick, Chenyang Zhao +4
Accurate and reliable measurements of three-dimensional surface structures are important for a broad range of technological and research applications, including materials science,…
Minimising Interference in Low-Pressure Supersonic Beam Sources
Jack Kelsall, Aleksandar Radic, John Ellis +2
Free-jet atomic, cluster and molecular sources are typically used to produce beams of low-energy, neutral particles and find application in a wide array of technologies, from neutr…
Helium atom micro-diffraction as a characterisation tool for 2D materials
Nick von Jeinsen, Aleksandar Radic, Ke Wang +7
We present helium atom micro-diffraction as an ideal technique for characterization of 2D materials due to its ultimate surface sensitivity combined with sub-micron spatial resolut…