Schreier, Marcel https://orcid.org/0000-0002-3674-5667
Héroguel, Florent
Steier, Ludmilla
Ahmad, Shahzada
Luterbacher, Jeremy S. https://orcid.org/0000-0002-0967-0583
Mayer, Matthew T. https://orcid.org/0000-0001-5379-2775
Luo, Jingshan https://orcid.org/0000-0002-1770-7681
Grätzel, Michael
Article History
Received: 27 July 2016
Accepted: 2 May 2017
First Online: 5 June 2017
Competing interests
: The authors declare no competing financial interests.