Achim Müller (born 14 February 1938 in Detmold) is a German chemist. He is Professor Emeritus at the Faculty of Chemistry, University of Bielefeld. His research involves mainly the chemistry of transition metals, especially with relation to nanochemistry. His current research relates mainly to the synthesis of spherical porous metal oxide nanocapsules Mo132 Keplerates. Müller has also worked on simple transition metal sulphur compounds, including related hydrodesulfurization catalysis and a new type of host guest chemistry based on polyoxovanadates He has also strong interest in history and philosophy of science. Academic career Achim Müller studied chemistry and physics at the University of Göttingen and received there his PhD degree (1965) and the Habilitation (1967). In 1971, he became professor at the University of Dortmund and in 1977 professor of Inorganic Chemistry at the University of Bielefeld. In 2006 he was awarded the Manchot-Forschungsprofessur of the Technische Universität München. Achim Müller is a member of the German Academy of Sciences Leopoldina, Polish Academy of Sciences, The Indian National Science Academy, National Academy of Exact Physical and Natural Sciences in Argentina, and Academia Europaea. He has received honorary degrees from the Russian Academy of Sciences (RAS) and the Université Pierre et Marie Curie, Paris as well as the “Profesor Honorario“ of the National University of La Plata. He has also received the Alfred Stock Memorial Prize 2000, Prix Gay-Lussac/Humboldt 2001, Sir Geoffrey Wilkinson Prize 2001, and the Centenary Medal of the Royal Society of Chemistry 2008/9, London. In 2012 he was awarded with the prestigious Advanced Grant by the European Research Council (ERC). He is an Honorary Fellow of the Chemical Research Society of India. Research His current research relates mainly to bottom-up pathways towards tailor-made spherical porous metal oxide nanocapsules Mo132 Keplerates. Müller's discovery of the molecular giant spheres (Keplerates) of the type Mo132 (diameter ca. 3 nm) and their derivatives, of the wheel shaped cluster Mo154 (Refs. and ) and hedgehog shaped cluster Mo368 (as large as 6 nm) has caused a paradigm shift due to the unique structural features and huge application range of these molecular nanoclusters . The capsule has 20 well-defined pores with crown-ether functions which may be reversibly opened and closed. Substrates enter through these pores, and they can react to form a variety of species depending on the internal tapestry of the nanocontainer. This inorganic nanocell also allows ion transport through the cavity. Several new