1. Materials and Supercritical Fluid Group, Department of Chemistry, University College Cork, Cork, Ireland
2. Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
3. Micro-Nano Electronics Centre, Tyndall National Institute, Lee Matings, Prospect Row, Cork, Ireland
4. Electron Microscopy and Analysis Facility (EMAF), Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland
5. Intel Ireland limited, Collinstown Industrial Estate, Leixlip, Co. Kildare, Ireland