1. 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. Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland
4. Catalan Institute of Nanotechnology, Campus de Bellaterra, Edifici CM7, ES 08193 Bellaterra, Barcelona, Spain
5. Intel Ireland Limited, Collinstown Industrial Estate, Leixlip, Co. Kildare, Ireland
6. Laboratoire des Technologies de la Microélectronique (CNRS), 38054 Grenoble, France
7. Catalan Institute of Research and Advanced Studies (ICREA), 08010 Barcelona, Spain