John Stride

John Stride

John Stride

B.Sc.(Hons) University of East Anglia, UK. 1991 | Ph.D. University of East Anglia, UK. 1995

Associate Professor

Contact details

Phone: +61 2 9385 4672
Email: J.Stride@unsw.edu.au

Office

Room 131, Dalton Building
UNSW, Kensington, 2052

Research Group Website

/research/research-groups/stride-group

Biographical Details

B.Sc.(Hons.) 1991, University of East Anglia, Norwich, UK  |   Ph.D. 1995, University of East Anglia with Dr. Upali Jayasooriya  |  Post-Doctoral Fellow with Prof. Feri Mezei, Hahn-Meitner Insitute, Berlin, Germany  |  1995 - 1998, Marie Curie Fellowship with Dr. Beatrice Gillon and Prof. Olivier Kahn, Laboratoire Léon Brillouin, Saclay, France, 1998-2000  |  Scientist, Time-of-Flight Group, Institute Laue-Langevin, Grenoble, France 2000-2005  |  Senior Lecturer, School of Chemistry, University of New South Wales (2009-present)  |  Associate Professor, School of Chemistry, University of New South Wales (2010-present).  

Research Interests

My research interests primarily centre on the fundamental nature of molecular and molecule-based materials. Of particular interest are materials displaying novel magnetic interactions, nano-materials and the interactions between molecules in the solid state.

These ideas can be summarised as:

  • The study of novel molecular and molecule-based magnetic materials demonstrates a wealth of phenomena, ranging from low dimensionality (1D chains and 2D sheets), through to those systems which show no tendency to coalesce into a long range magnetic as a result of frustration - so-called spin liquids and spin ice.

Isolated clusters of several magnetic ions have been found to behave as nano-magnets, characterised as having a single, large magnetic moment per cluster. When these isolated moments have an inherent spin-relaxation anisotropy, they can behave as an ensemble of isolated, identical magnetic particles.

Research into such materials has potential applications in high density magnetic storage media, magnetic films and sensing devices.

  • The manner in which individual molecules align and condense in the crystalline state is a result of the intermolecular forces that act upon molecules.  Long range ordering occurs as a direct result of the translational self-similarity in these forces.  Due to the non-spherical nature of most molecules, the final crystalline structure is therefore a balance between the Gibbs free energies of competing potential stacking arrangements.

Supramolecular chemistry is a general term used to cover those studies that attempt to perturb these competing effects to induce one particular ordering motif (or geometry) over another. We aim to study these often very complex interactions first in simple model systems, before building in complexity and moving toward systems displaying apparent emergent behaviour.

Another area in which intermolecular interactions are dominant is nano-science which aims to deliver materials intimately structured on the nano-scale - thousands of times smaller than the width of a human hair.  We synthesise and study materials as diverse as single sheets only one atom thick - e.g. graphene - and highly fluorescent nanoparticles such as quantum dots.  These materials sit at the interface between the chemistry of individual molecules and the collective physical properties of bulk materials; thechnologically they represent the ultimate in miniturisation.

  • Research in the Stride Group makes heavy use of neutron scattering techniques and I retain an interest is the development of new neutron instrumentation and methods.  These are exciting times for the international neutron scattering community, with new facilities coming online over the next few years.  This effort is not lost on Australia; the new national neutron facility at the Bragg Institute, provides doorstep access to world class instrumentation for Australian researchers in fields as diverse as physics, chemistry and materials science, through to the geo-sciences and biology.

Selected Publications

magnetic interactions

  • Switchable Magnetism: Neutron Diffraction Studies of The Desolvated Coordination Polymer Co3(OH)2(C4O4)2.   R.A. Mole, J.A. Stride, M.A. Nadeem, J.A. Stride, V. Peterson and P.T. Wood, Inorg. Chem., 2013, 52, 13462-13468.
  • Four new coordination polymers constructed from benzene tricarboxylic acid: synthesis, crystal structure, thermal and magnetic properties.   M.A. Nadeem, M. Bhadbhade and J.A. Stride, Dalton Trans., 2010, 39, 9860.
  • Neutron Diffraction and Theoretical DFT Studies of Two Dimensional Molecular-Based Magnet K2[Mn(H2O)2]3[Mo(CN)7]2•6H2O.   B. Gillon, A. Goujon, S. Willemin, J. Larionova, C. Desplanches, E. Ruiz, G. André, J.A. Stride, C. Guérin,R. Clérac, Inorg. Chem., 2007, 46, 1090.
  • Symmetry and Topology Determine the MoV-CN-MnII Exchange Interactions in High Spin Molecules. E. Ruiz, G. Rajaraman, S. Alvarez, B. Gillon, J. Stride, R. Clérac, J. Larionova and S. Decurtins, Angew. Chem., 2005, 44, 2711.

nano-materials

  • Modulation of CdSe Quantum Dot Optical Properties upon Graphene Deposition.  F.K. Kanodarwala, F. Wang, P.J. Reece and J.A. Stride, J. Luminesc., 2014, 146, 46-52.
  • Synthesis and characterization of organic-inorganic hybrid materials prepared by sol-gel and containing ZnxCd1-xS nanoparticles prepared by a colloidal method.  L.F.F.F. Gonçalves, F.K. Kanodarwala, J.A. Stride, C.J.R. Silva, M.R. Pereira, M.J.M. Gomes, J. Luminesc., 2013, 144, 203-211.
  • Sulfur-Graphene Composite for Rechargeable Lithium Batteries.   J.-Z. Wang, L. Lu, M. Choucair, J.A. Stride, X. Xu, H.-K. Liu, J. Power Sources, 2010, 196, 7030. 
  • Gram-scale production of graphene based on solvothermal synthesis and sonication.   M. Choucair, P. Thordarson and J.A. Stride, Nat. Nanotechnol., 2009, 4, 30. 

intermolecular interactions

  • Central atom size effects on the methyl torsions of group XIV tetratolyls.  M.C.C. Ng, J.B. Harper, A.P.J. Stampfl, S. Rols, G.J. Kearley and J.A. Stride, Chem., Eur. J., 2012, 18, 13018. 
  • Dispersive kinetics in discotic liquid crystals.  O. Kruglova, F.M. Mulder, G.J. Kearley, S.J. Picken, J.A. Stride, I. Paraschiv and H. Zuilhof, Phys. Rev. E, 2010, 82, 051703. 
  • Determination of the Low Temperature Structure of Hexamethylbenzene. J.A. Stride, Acta Cryst. B, 2005, 61, 200.
  • The Origin of Heterogeneous Relaxation in a Random Copolyester. G.J. Kearley, T.J. Dingemans, O. Kruglova, J. Stride, and F.M. Mulder, Macromolecules, 2004, 37, 9855.
  • Intermolecular Fermi-Resonance. J.A. Stride, U.A. Jayasooriya and P.H. Dallin, J. Chem. Phys., 2003, 119, 2747.

neutron instrumentation

  • Toward polarization analysis on a thermal time-of-flight spectrometer. J.A. Stride, K.H. Andersen, A.P. Murani, H. Mutka, H. Schober and J.R. Stewart, Physica B, 2005, 356, 146.
  • Powder Diffraction at a Long Pulse Spallation Source. J.A. Stride, D. Wechsler, F. Mezei and H.-J. Bleif, Nuc. Inst. Meth. Phys. A, 2000, 451, 480.