This PhD project at the University of Bristol focuses on mapping enhanced water density fluctuations around complex molecules, with applications ranging from hydrophobic surfaces to proteins. The research aims to deepen our understanding of the hydrophobic effect, a phenomenon central to processes such as protein folding, enzyme activity, drug binding, nanomaterial self-assembly, and biomolecular condensation. Recent findings suggest that the hydrophobic effect is driven by enhanced fluctuations in water near critical surface phase transitions, rather than solely by hydrogen bond disruption. Building on this insight, the project will bridge the gap between idealized models and realistic biological and soft matter systems, such as micelles and membranes. The work will link microscopic interfacial behavior to macroscopic function, providing new physical insights relevant to biophysics, pharmaceutical design, and nanotechnology. The research will employ both coarse-grained and atomistic models to study the effects of temperature, pressure, and chemistry on interfacial fluctuations. Advanced techniques like metadynamics and data-driven approaches will be used to connect surface properties to water behavior, aiming to develop a quantitative framework for predicting water-mediated interactions in biological and nanotechnological contexts. The project benefits from collaborations with experts in protein aggregation and biomolecular structures, and will utilize the University of Bristol's world-class computational facilities, including the ISAMBARD 3 supercomputer and BlueCrystal Phase 5 High Performance Cluster. As a member of the Physics Graduate School, the successful candidate will join a vibrant, diverse community and have access to comprehensive training, support, and career development resources. Funding is available for home students, covering living expenses at the UKRI rate, tuition fees, and training costs. A limited number of fully-funded places are available for outstanding international candidates, with the option for others to apply with external or partial funding. Applicants should have a strong background in physics or a related field, and meet the University's English language requirements. The application deadline is 19 January 2026. For more information, contact the Bristol Physics Graduate School at [email protected].

This PhD project at the University of Bristol's School of Physics focuses on the critical behaviour in active matter, specifically investigating whether the critical point of motility-induced phase separation (MIPS) aligns with known equilibrium universality classes or represents a new form of non-equilibrium criticality. The research will employ large-scale GPU simulations of active Brownian, run-and-tumble, and lattice-gas models, combined with finite-size scaling analyses such as Binder-cumulant crossings, compressibility peaks, and correlation-length estimates from structure factors. These methods will be used to map phase boundaries and extract critical exponents, leveraging the university's ISAMBARD 3 supercomputer and BlueCrystal Phase 5 HPC cluster for high-performance computation. The project aims to resolve the universality of MIPS, a fundamental and timely question in statistical and non-equilibrium physics, with potential applications in designing and controlling active materials, soft robotics, and microfluidic platforms. The research group is led by Prof. Nigel Wilding, with additional expertise from Prof. Francesco Turci, Dr. Simon Hanna, and Prof. T. Liverpool. The successful candidate will join a vibrant graduate research community, benefit from comprehensive induction and skills training, and have access to a supportive environment for career development. Funding covers full tuition and a stipend for home students, with a limited number of fully-funded places for outstanding international candidates. Applicants should have a strong background in physics or a related field, and meet the university's English language requirements. The application deadline is 19 January 2026. For further information, contact Prof. Nigel Wilding or the Bristol Physics Graduate School.