Eleanor Crabb is a Lecturer in Materials Chemistry at The Open University. She studied chemistry at the University of Reading where she continued to undertake a PhD in heterogeneous catalysis. She spent another 9 months at Reading as a postdoctoral research fellow before moving to the Ecole Normale Superieure de Chimie de Montpellier as a postdoctoral research fellow. In 1993, she joined The Open University and has worked on a number of science courses, producing both text based and multimedia materials. She has produced sequences introducing students to 3D molecular representations of molecules and proteins for a wide range of courses at different levels, and has produced a number of animated multimedia sequences on receptor binding. Her research interests remain in the field of heterogeneous catalysis and she is the author (or co-author) of around 20 papers in this area. She is currently seconded part-time to one of the Centres for Excellence in Teaching and Learning (CETL) awarded to The Open University. Rob Janes is a Staff Tutor at The Open University in Wales. He studied chemistry at the University of Leicester, where he remained to undertake PhD research in solid state chemistry of the silver halides. He spent one year as a visiting scientist at Eastman-Kodak, Rochester, New York, before moving to the University of Cambridge as a Post-Doctoral Research Associate, working on high-Tc superconductivity. He taught at the Manchester Metropolitan University, developing courses in inorganic chemistry, materials chemistry and imaging science. His publications record consists of around 50 papers in the field of solid-state/materials chemistry. His research interests centre on the synthetic routes to ceramics - more specifically nanosize ceramic oxides and composite oxides, inorganic pigments and phosphors and studies of the electronic and magnetic properties of solids. Elaine Moore is a Reader in Chemistry at The Open University. She studied chemistry at Oxford University, stayed on to complete a DPhil in theoretical chemistry and after a two year post-doctoral position at Southampton, she joined The Open University in 1975. She has produced OU teaching texts in chemistry and astronomy and her research interests are in theoretical chemistry applied to solid state systems and to NMR spectroscopy. She is author or co-author on over 40 papers in scientific journals. Lesley Smart is a Senior Lecturer in chemistry at The Open University. She studied chemistry at the University of Southampton where she stayed on to complete a PhD on Raman spectroscopy. She has written on many science courses and chaired the production of the second level chemistry course. Her research interests are in the areas of solid state chemistry and catalysis, and in particular, preparing and characterizing new materials and catalysts. Dr Rob Davies (Consultant Author) is Senior Lecturer at Imperial College, London. He graduated from the University of Bristol before going to St John's College Cambridge to study for his PhD. He was appointed to a three year Research Fellowship at St Catharines College Cambridge and then moved to Imperial College where he was awarded a Governors' lectureship. His research interests lie in synthetic organometallic and coordination chemistry, especially of the main group metals. Dr David Johnson (Consultant Author) is a Visiting Reader in Chemistry at The Open University. A fellow of Trinity Hall, Cambridge, he was a founding member of the Department and worked on many of the chemistry courses prior to his retirement.