| EPSRC Reference: |
GR/L33962/01 |
| Title: |
NEUTRON DIFFRACTION STUDIES OF SOLVATION IN LAYERED MATERIALS.II.GRAPHITE-METAL-AMINE INTERCALATES |
| Principal Investigator: |
Skipper, Professor N |
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| Department: |
Physics and Astronomy |
| Organisation: |
UCL |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 February 1997 |
Ends: |
31 January 1999 |
Value (£): |
34,209
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Summary on Grant Application Form |
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The aim of this proposal is to establish the microscopic structure of potassium-amine graphite intercalation compounds (GICs) using time-of-flight neutron diffraction techniques and to relate this structure to the electronic properties. Two systems have been chosen for study (1) potassium-ammonia-graphite and (2) potassium-methylamine-graphite. The first system has been the subject of several previous experimental studies, although current interest stems largely from the observation of a metal-nonmental Mott transition, induced by varying the composition of the intercalant layers. This leads to the expectation that these GICs are the 2D structural and electronic analogues of bulk metal-ammonia solutions. Since their unusual electronic properties are intimately related to the structure of the intercalant layers, it is imperative to determine this structure as completely as possible. The second system is a new GIC chosen as a comparison. Unlike their ammonia counterparts, bulk potassium-methylamine solutions do not exhibit a true composition driven Mott transition. We therefore expect to see contrasting cation solvation and electronic behaviour in our two GIC systems. Thus the opportunity exists for employing these two systems to study the effects of dimensionality on electron localisation and the Mott transition, in the crossover regime between 2D and 3D behaviour.
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Key Findings |
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Potential use in non-academic contexts |
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Impacts |
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| Description |
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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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