Aerosol science, the study of airborne particles from the nanometre to the millimetre scale, has been increasingly in the public consciousness in recent years, particularly due to the role played by aerosols in the transmission of COVID-19. Vaccines and medications for treating lung and systemic diseases can be delivered by aerosol inhalation, and aerosols are widely used in agricultural and consumer products. Aerosols are a key mediator of poor air quality and respiratory and cardiac health outcomes. Improving human health depends on insights from aerosol science on emission sources and transport, supported by standardised metrology. Similar challenges exist for understanding climate, with aerosol radiative forcing remaining uncertain. Furthermore, aerosol routes to the engineering and manufacture of new materials can provide greener, more sustainable alternatives to conventional approaches and offer routes to new high-performance materials that can sequester carbon dioxide. Candidates who aspire to work in a truly multidisciplinary field and who have an undergraduate background in any of the following areas are encouraged to apply: chemistry, physics, biological sciences, life and medical sciences, chemical and mechanical engineering, pharmacy and environmental sciences. You will be based at the University of Bristol for the first seven months of your first year of this EPSRC Centre for Doctoral Training. During this time, you will receive training in the underlying physical science governing the properties and transformation of aerosols. Training will be provided by academics and industrial partners using a team-based learning approach. You will then undertake a short research project for three months that could be in one of the partnering universities (Bath, Birmingham, Cambridge, Hertfordshire, Imperial, Manchester or Surrey), giving you an opportunity to gain an insight into aerosols in an area complementary to your eventual PhD research. During year two or year three, you will undertake a placement hosted by the industrial partner supporting your project, giving you a perspective on aerosols outside the academic environment. It is our expectation that our graduates will be agile experts, able to work at the many boundaries between the conventional disciplines where aerosols play a role.