1. Singapore-HUJ Alliance for Research and Enterprise; Nanomaterials for Energy and Water Management; Campus for Research Excellence and Technological Enterprise (CREATE); Singapore 138602 Singapore
2. School of Materials Science and Engineering; Central South University; Changsha 410083 China
3. Casali Center for Applied Chemistry; Institute of Chemistry; The Center for Nanoscience and Nanotechnology; The Hebrew University of Jerusalem; Jerusalem 9190401 Israel