The University of Plymouth Marine Institute is offering a funded PhD opportunity focused on using nanotechnology to transform ocean-based climate mitigation. This research addresses the challenge of iron fertilization in the ocean, where iron is a limiting nutrient for algae in over 25% of global waters. By stimulating algal growth, photosynthesis is enhanced, and atmospheric CO₂ can be drawn down as algae and their detritus sink to the deep ocean. However, real-world studies have shown that added iron quickly becomes unavailable to algae, other nutrient limitations can hinder uptake, and algal biomass is rapidly recycled, re-releasing carbon.

This innovative PhD project aims to develop a new nanotechnological approach to make ocean-based carbon drawdown more effective and sustainable. The successful candidate will design and fabricate doped, iron-based nanoparticles with precisely controlled physico-chemical properties to enhance biological uptake. The project also investigates whether physically removing nanoparticle–algae complexes can overcome rapid recycling, enable waste valorisation, and support a circular-economy approach to carbon management.

Supervisors for this project include Professor Jamie Lead, Dr Craig Dedman-Jones, Professor Abigail McQuatters-Gollop, and Professor Simon Ussher, all affiliated with the University of Plymouth. The research sits at the intersection of nanotechnology, marine science, climate solutions, and environmental chemistry, offering a unique opportunity for students passionate about sustainable innovation and blue carbon research.

Funding is provided for tuition fees and a stipend, though specific financial details are not listed. Applicants should have a strong background in environmental science, chemistry, marine science, or related fields, with experience in nanotechnology, materials science, or algal biology considered advantageous. The application deadline is December 28, 2025. Interested candidates should visit the University of Plymouth website for the full advert and application instructions.

Keywords: nanotechnology, marine science, climate mitigation, carbon removal, iron fertilization, algal growth, circular economy, environmental science, chemistry, blue carbon.