Jonathan A. Hinks

TL;DR: A dynamic and complex evolution in the microstructure was observed including the formation of defect clusters, dislocations and bubbles, indicating the important role grain boundaries can play in trapping He and thus in giving rise to the enhanced radiation tolerance of nanocrystalline materials.

TL;DR: In this paper, the effects of helium ion irradiation energy and sample temperature on the performance of grain boundaries as helium sinks in ultrafine grained and nanocrystalline tungsten were investigated.

TL;DR: In this paper, the existence of a grain size threshold for enhanced irradiation resistance in high-temperature helium-irradiated nanocrystalline and ultrafine tungsten is demonstrated.

TL;DR: It has been demonstrated that band broadening takes place during tensile deformation for mono- and bilayer graphene but that band narrowing occurs when the number of graphene layers is more than two and that this change in Raman band shape and width has been interpreted as being due to a reversible loss of Bernal stacking during deformation.

TL;DR: Transmission electron microscopy (TEM) with in situ ion irradiation is unique amongst experimental techniques in allowing the direct observation of the internal microstructure of materials on the nanoscale whilst they are being subjected to bombardment with energetic particles as mentioned in this paper.