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We know photosynthesis is a feature of plants which absorb sunlight and use the energy to convert atmospheric CO2 into glucose. While sunlight peaks in the 400-700 nm region (of wavelengths), scientists have shone ultraviolet radiation on plants and found that this opens new avenues in enzyme engineering and drugs through photocatalysis-the process of using light to jump-start chemical reactions. Light-activated enzymes turn light energy into chemical action. In some cases, light triggers lightning-fast shape changes that turn on the enzymes. These movements can now be tracked in real-time on a scale of trillionths of a second using ultra-fast imaging. Researchers at Nanjing University, China have used visible light to trigger inherent enzymes as catalysts, paving the way for manufacturing useful products and drugs.
Photocatalysis means