Research Areas
Materials Synthesis: II/VI, III/VI and III/V semiconductors and oxides.
1. Thin Films by MOCVD:
Metal Organic Chemical Vapour
Deposition.
2. Conventional
MOCVD:
Improved handling of metal
alkyls by the use of adducts: control of mass transport,
control of reactivity use
as dopants control of flow rate.
3. Single
Precursor Approaches:
The use of thiols, selenols,
thio or seleno-carbamates, novel materials from novel
precursors factors controlling
deposition, InS, CdS etc.
4. Nanodispersed
Materials:
Especially Cd or Zn chalcogenides,
surface derivatised sub-micrometric and nano-metricmaterials,
especially as prepared from
simple single molecule precursors.
5. Chemical Bath Deposition:
The preparation of thin films,
or dispersed materials by controlled chemical reaction in aqueous solution
e.g. CdS from thiourea
containing solutions with metal-ion buffered cadmium. The importance of
supersaturation.
Coordination and Bioinorganic Chemistry: Speciation and Toxicity:-
1. Cadmium Toxicity:
The effect of cadmium on toxicity
to mammalian cells in culture, quantification using speciation calculations.
2. Cadmium Complexes:
NMR and solid state NMR studies.
3. Cadmium and Clays:
The effect of solution speciation
on the nature of the species sorbed, preliminary observations.
4. Carbamates:
The unusual properties of
amino acids with low values for the pKa at nitrogen and possible affects
on neurotoxicity.
5. Chromate Toxicity:
DNA lesions toxicity and the
importance of reduction mechanisms.
(c) Imperial College of Science, Technology and Medicine, 1999
Last updated16-01-1999 by b.laermann@ic.ac.uk, d.j.otway@ic.ac.uk.