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||Growth and Characterisation of Thin Film
Dr. David W. McComb
Dept of Materials, Imperial College, London, U.K.
|Day and Time
Monday, May 10, 2004 at 2:00 p.m.
(refreshments will be served)
University of Toronto, Galbraith Building, Room 248
35 St. George Street, Toronto
Circuits and Devices Chapter
(IEEE Lasers and Electro-Optics Society)
Emanuel Istrate, E-mail: firstname.lastname@example.org
No need to confirm your attendance - everyone welcome
In this talk I shall focus on the results of a recent investigation of
the major factors that influence colloidal self-assembly of thin film
photonic crystals. Although colloidal self-assembly is widely used for
the formation of thin film photonic crystals, a review of the scientific
literature suggests that the factors influencing the growth process and
the optimum conditions for growth of large crystals with low defect
densities are not transparent. The use of colloids of different
materials, sizes and dispersions, as well as the use of numerous
characterisation methods also makes it difficult to obtain a clear
understanding of the growth process. It can be anticipated that many of
the factors influencing the growth process will not be independent and
understanding the interaction between these variables is critical. In
this presentation the results of a systematic study of the factors
influencing the controlled vertical drying technique will be discussed.
The effect of temperature, relative humidity, sphere diameter, colloidal
concentration and substrate angle will be considered. The impact of
these results on the development of multifunctional thin film photonic
crystals will be discussed.
David McComb joined the Department of Materials at Imperial College
London as a senior lecturer in 2003. After graduating from the
University of Glasgow with a BSc in Chemistry, he studied the
development and application of electron energy-loss spectroscopy for his
PhD at the Cavendish Laboratory in Cambridge under the supervision of
Professor Archie Howie. On completion of his PhD studies he was
appointed as a college research fellow at Corpus Christi College,
Cambridge and was a awarded a fellowship by the Royal Commission for the
1851 Exhibition to pursue his work in the field of electron energy-loss
spectroscopy. A brief flirtation with surface science and scanning
tunnelling microscopy followed when he was appointed as a senior
research associate at Steacie Institute for Molecular Sciences at the
CNRC in Ottawa, Canada. He returned to the field of nano-analytical
electron microscopy when he moved to the Brockhouse Institute for
Materials Research as a senior research associate to investigate the
application of EELS to a range of problems in metals, semiconductors,
ceramics and advanced composite systems in close collaboration with
Professor George Weatherly. He was appointed as a lecturer in the
Department of Chemistry at the University of Glasgow in 1996 and was
promoted to senior lecturer in 2002. His current research topics include
nanoanalytical electron microscopy techniques for the study of
chemistry, structure and bonding at interfaces and the development of
multifunctional three dimensional photonic crystals. He has published
over 80 papers in scientific journals.