1. Department of Physics, Concordia University, Montréal, Quebec H4B 1R6, Canada
2. Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique (INRS), Varennes, Quebec J3X 1P7, Canada
3. Department of Chemistry & Biochemistry, Centre for NanoScience Research (CeNSR), Centre for Research in Molecular Modelling (CERMM), Concordia University, Montreaĺ, Quebec H4B 1R6, Canada