and Structural Chemistry
Department of Chemistry
Imperial College London
Exhibition Road, London
Phone:+44 (0)207 594 5871
research focuses on the following:
formation and wetting behaviour of passivated nanoparticles.
For a metallic or semi-conducting nanoparticle its optical or electronic properties
vary profoundly with its size. Thus, the properties of a superlattice of nanoparticles
can be tuned according to its constituent particles. Self-assembly provides
a means of constructing ordered superstructures from these nanoparticles.
Typically, chemically stabilised nanoparticles are allowed to self-organise
into ordered arrays at the air-water interface and then transferred directly
to a substrate. Despite the many recent successes of this method, a theoretical
understanding of the structure and properties of these arrays is still lacking.
We employ molecular dynamics simulations to investigate the structure and
dynamics of alkanethiol passivated gold nanoparticles in vacuum and at the
in nanoscale systems.
Electrowetting is the change in wetting behaviour that results from the
application of an electric field. This effect is greatly enhanced by the presence
of an insulating film between the liquid drop and the electrode. Such methods
are now referred to as electrowetting on insulator coated electrodes (EICE).
The economy and simplicity of this method have stimulated many potential applications
in displays, liquid lenses, and micro-actuation. Experimentalists have probed
the quantitative evolution of the contact angle with the electric field, observing
saturation effects and deviations from the thermodynamics. We intend to use
both classical and quantum simulation methods to test the validity of the
macroscopic equations for nanoscale systems and to investigate the processes
occurring at the wetting line.