| EPSRC Reference: |
GR/R12008/01 |
| Title: |
Network Glassess: Atomic Dynamics, Photo-Structural Change and Bond Type |
| Principal Investigator: |
Salmon, Professor PS |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Physics |
| Organisation: |
University of Bath |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
14 August 2001 |
Ends: |
13 October 2004 |
Value (£): |
193,716
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| EPSRC Research Topic Classifications: |
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| EPSRC Industrial Sector Classifications: |
| Manufacturing |
Construction |
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Summary on Grant Application Form |
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The object of this proposal is to use state of the art pulsed neutron scattering methods to investigate three fundamental aspects of the structure and dynamics of network materials that are of significant scientific and technological importance. Firstly the dynamical properties of a prototypical covalently bonded network glass will be investigated using the method of isotopic substitution in inelastic neutron scattering to measure, for the first time, the full set of coherent dynamical partial structure factors for a disordered network material. Secondly, unprecedented information on the phenomenon of photo-structural change will be provided by measuring the full set of static partial structure factors for a generic chalcogenide glass both before and after illumination with light of band gap energy. Thirdly, the roles of ionicity versus covalency on a network structure will be examined by measuring the full set of static partial structure factors for a typical ionic network material in both its glassy and liquid states in additic to the vibrational density of states. The materials to be highlighted are GeSe_2 (covalent network) and ZnCI_2 (ionic network). The work will take advantage of new developments in neutron scattering instrumentation at ISIS and will provide fresh insight into several outstanding problems in th science of network materials which cannot be obtained by using other experimental methods. Substantial recourse will be made to Car-Parrinello and other molecular dynamics results in order to test the methods and models used and, where appropriate, aid in the data interpretation.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.bath.ac.uk |