John Greedan, McMaster University
Chemistry
Professor
Hamilton, Ontario
greedan@mcmaster.ca
Office:
(905) 525-9140 ext. 24725
Expert In
Bio/Research
In our group we study the relationship between the structure and properties of inorganic solids. Our focus is on transition metal oxides (TMO's). TMO's exist in an astonishing array of crystal structures, >103 structure types are known and hundreds of new ones are discovered each year. The crysta...
Click to Expand >>
Click to Expand >>
Bio/Research
In our group we study the relationship between the structure and properties of inorganic solids. Our focus is on transition metal oxides (TMO's). TMO's exist in an astonishing array of crystal structures, >103 structure types are known and hundreds of new ones are discovered each year. The crystal structure and the crystal chemistry (elemental composition, bond distances, bond angles and connectivity or topology) determine the electronic structure which in turn fixes the physical and chemical properties. TMO's exhibit a rich variety of properties from electrically insulating to superconducting, transparent to highly reflecting and diamagnetic to ferromagnetic, often within the same structural family. The physical properties can be tuned by manipulation of the crystal chemistry and, in favourable cases, very minor changes in chemistry produce major changes in properties.
It is the goal of our research program to understand these structure-property relationships in detail for selected TMO systems. We synthesize new TMO's using as much of the periodic table as possible and use the excellent and extensive facilities of the Brockhouse Institute for Materials Research and the Department of Chemistry to characterize the physical properties. We also make frequent use of national and international facilities such as synchrotron light sources and neutron sources in North America and Europe.
Click to Shrink <<
It is the goal of our research program to understand these structure-property relationships in detail for selected TMO systems. We synthesize new TMO's using as much of the periodic table as possible and use the excellent and extensive facilities of the Brockhouse Institute for Materials Research and the Department of Chemistry to characterize the physical properties. We also make frequent use of national and international facilities such as synchrotron light sources and neutron sources in North America and Europe.
Click to Shrink <<