The African Academy of Sciences (AAS) inaugurated its Presidential Lecture Series on 27 March 2025 with a compelling presentation by Professor Malik Maaza, a distinguished Fellow of the AAS and the UNESCO-UNISA Africa Chair in Nanosciences and Nanotechnology. The lecture, titled "Nanosciences & Nanotechnologies Towards Sustainable Development Goals (SDGs) and Science with Social Impact," was delivered virtually and attracted a diverse audience from across the continent.

The AAS launched this lecture series to provide a platform for eminent scientists and thought leaders to discuss pressing scientific issues and their implications for Africa's development. By facilitating these dialogues, the AAS aims to foster a deeper understanding of how science and technology can address the continent's challenges and contribute to global knowledge.

Professor Maaza's lecture delved into the transformative potential of nanosciences and nanotechnologies in achieving the SDGs, particularly in the context of rapid urbanization and climate change. He highlighted that with 55% of the world's population residing in urban areas—a figure projected to increase by 2.5 billion by 2050, with 90% of this growth in Asia and Africa—there is an urgent need for innovative solutions to emerging challenges.

In the energy sector, Professor Maaza discussed the development of vanadium-based thermochromic nano-coatings for smart windows. These coatings can regulate solar heat radiation without external energy input, offering a sustainable approach to indoor climate control. Additionally, he introduced the concept of nanofluids as advanced coolants that could significantly enhance waste heat recovery and improve drug delivery systems.

Addressing environmental concerns, Professor Maaza presented research on converting carbon dioxide into multifunctional carbonates. These carbonates have demonstrated effective fertilizing properties, high reflectivity suitable for radiative cooling applications, and substantial porosity and hardness, making them potential supplementary materials for the cement industry. Such innovations not only mitigate greenhouse gas emissions but also contribute to sustainable agricultural and industrial practices.

The lecture underscored the critical role of science, technology, and innovation (STI) in tackling the multifaceted challenges posed by urban expansion and climate change. Professor Maaza emphasized that interdisciplinary research and collaboration are essential for developing solutions that are both scientifically sound and socially impactful.

The AAS's initiative to launch the Presidential Lecture Series reflects its commitment to advancing scientific excellence and promoting dialogue on topics of continental and global significance. By featuring renowned experts like Professor Maaza, the series aims to inspire researchers, policymakers, and the public to engage with science as a tool for sustainable development.

For those who missed the live event, the lecture is available for viewing on the AAS YouTube channel.