Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Claes-Göran Granqvist was born in Helsingborg, Sweden, in 1946. He is one of the leading figures of Swedish and international science in various fields (see his selected papers and books below) including nanomaterials; green nanotechnology; materials for solar energy utilization and energy efficiency (solar cells, solar collectors, energy efficient fenestration), electrochromic materials (smart windows); biomimetics; photocatalitic materials (air and water cleaning); materials for radiative cooling and superconductivity; fluctuation-enhanced sensing; etc. In August 2011, Science Citation Index shows that his h-index is 54; the number of citations to his papers is 14214. He published around 730 research papers in mostly refereed journals, over 30 books, had invited conference presentations at about 250 international conferences and chaired about 30 international meetings. During the years, he had many lectures and lecture tours in Europe, Asia, Africa, North and South America, Australia.