Black (nano)-Gold Combat Climate Change

Global warming is a serious threat to the planet and the living beings. One of the main cause of global warming is the increase in the atmospheric CO2 level. The main source of this CO2 is from the burning of fossil fuels in our daily lives (electricity, vehicles, industry and many more). Researchers at TIFR have developed the solution phase synthesis of Dendritic Plasmonic Colloidosomes (DPCs) with varying interparticle distances between the gold Nanoparticles (NPs) using a cycle-by-cycle growth approach by optimizing the nucleation-growth step. These DPCs absorbed the entire visible and near-infrared region of solar light, due to interparticle plasmonic coupling as well as the heterogeneity in the Au NP sizes, which transformed golden gold material to black gold. The developed black gold acts like an artificial tree that uses CO2 , sunlight and water to produce fuel.

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