1. Department of Chemistry and Bioscience, Aalborg University, DK-9220 Aalborg, Denmark.
2. Department of Mathematical Sciences, Aalborg University, DK-9220 Aalborg, Denmark.
3. Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.