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Professor David Wales ScD, FRSC

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The self-assembly of complex mesoscopic structures, the folding of proteins, and the complicated phenomenology of glasses are all manifestations of the underlying potential energy surface (PES). In each of these fields related ideas have emerged to explain and predict chemical and physical properties in terms of the PES. In studies of clusters and glasses the PES itself is often investigated directly, whereas for proteins and other biomolecules it is also common to define free energy surfaces, as the figure below illustrates for lysozyme.

Applications of energy landscape theory in my group range from studies of tunnelling splitting patterns in small molecules to computer simulation of protein folding and misfolding, including aggregation of misfolded proteins. Other active research topics include global optimisation and investigation of how the thermodynamic and dynamic properties of glasses are related to the underlying PES.

Two recent advances are now providing new insight into larger systems. Discrete path sampling enables dynamical properties to be obtained efficiently, and is being used to calculate folding rates for proteins. Unexpected connections between dynamics and thermodynamics have also been revealed by the application of catastrophe theory to energy landscapes, and new results are now being obtained to characterize phase transitions.

Publications

Communication: Newton homotopies for sampling stationary points of potential energy landscapes.
D Mehta, T Chen, JD Hauenstein, DJ Wales – The Journal of chemical physics (2014) 141, 121104
Superposition Enhanced Nested Sampling
S Martiniani, JD Stevenson, DJ Wales, D Frenkel – Physical Review X (2014) 4, ARTN 031034
Communication: optimal parameters for basin-hopping global optimization based on Tsallis statistics.
C Shang, DJ Wales – The Journal of chemical physics (2014) 141, 071101
Design principles for Bernal spirals and helices with tunable pitch.
SN Fejer, D Chakrabarti, H Kusumaatmaja, DJ Wales – Nanoscale (2014) 6, 9448
Energy landscapes of planar colloidal clusters
JW Morgan, DJ Wales – Nanoscale (2014) 6, 10717
Communication: Analysing kinetic transition networks for rare events
JD Stevenson, DJ Wales – The Journal of chemical physics (2014) 141, 041104
Structure and Properties of DNA in Apolar Solvents
A Arcella, G Portella, R Collepardo-Guevara, D Chakraborty, DJ Wales, M Orozco – J Phys Chem B (2014) 118, 8540
Certification and the potential energy landscape.
D Mehta, JD Hauenstein, DJ Wales – The Journal of chemical physics (2014) 140, 224114
Potential energy landscape of the two-dimensional XY model: Higher-index stationary points
D Mehta, C Hughes, M Kastner, DJ Wales – The Journal of chemical physics (2014) 140, 224503
An inversion-relaxation approach for sampling stationary points of spin model Hamiltonians.
C Hughes, D Mehta, DJ Wales – The Journal of chemical physics (2014) 140, 194104
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Research Group

Research Interest Group

Telephone number

01223 336354

Email address

dw34@cam.ac.uk