Biophotonic nanomaterials: interfacing quantum dots with light-absorbing proteins to improve their efficiency of solar energy harvesting

Summary

The global transition from fossil fuels to renewable energy sources necessitates the development of more advanced technologies for solar energy harvesting. Nanomaterials, due to their unique optical and electronic properties, have become pivotal in this field. This project will explore the integration of nanomaterials with optically-active biomolecules, focusing on the proteins found in plants that absorb sunlight. These plant proteins are a source of inspiration for solar energy research because the early stages of photosynthesis have a very high quantum efficiency. Light-harvesting proteins (LHPs) from plants contain chlorophyll pigments and are highly effective at absorbing blue and red light, however, they absorb poorly in other spectral regions. In contrast, quantum dots (QDs) are tiny semiconductor nanoparticles, which are very stable, can absorb photons over a much wider spectral range than LHPs. We need to develop novel methods to link QDs to LHPs and enable energy transfer to extend the LHP spectral range and form novel nanocomposite materials.

In this project, we will synthesize new types of QDs and link them to proteins in new ways, to produce a “bio-hybrid” nanomaterial that is more effective at absorbing solar energy. The objectives are: (1) to synthesise QDs where size and surface chemistry are varied to be optimal for the system, (2) to generate specialized biomembranes that contain attachment sites for the QDs, (3) to attach the LHP directly to the QDs with novel linker molecules. The successful candidate will have the opportunity to collaborate with experts in microscopy and spectroscopy to characterize the structural and photophysical properties of this biohybrid system using advanced microscopy and spectroscopy tools to elucidate the energy transfer pathways. The findings from this project will support the nanotechnology industry to develop devices capable of converting solar energy into electricity with greater efficiency, ultimately contributing to the global shift towards sustainable energy.

We welcome applications from students with a background or interest in nanotechnology, biophysics, chemistry, physics, or related fields. We strongly encourage applications from candidates of diverse backgrounds, including those from underrepresented groups in STEM. Our research group is committed to providing a supportive and inclusive environment for all students. We are also committed to providing accommodations for students with disabilities. Please contact us to discuss any specific needs.

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