1. Department of Chemistry School of Technology Pandit Deendayal Energy University Gandhinagar Gujarat 382 007 India
2. Department of Solar Energy School of Technology Pandit Deendayal Energy University Gandhinagar Gujarat 382 007 India
3. Polish Academy of Sciences Institute of Physical Chemistry Kasprzaka 44/52 Warsaw 01-224 Poland
4. Department of Chemistry Faculty of Science King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
5. Department of Physics Indian Institute of Technology Roorkee Roorkee Haridwar Uttarakhand 247667 India
6. Department of Metallurgical and Materials Engineering Karamanoglu Mehmetbey University Karaman 70200 Turkey
7. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 USA