A single nanocluster of 22 gold atoms -- Au22 -- is only 1 nanometer in diameter, allowing it to easily slip through the bacterial cell wall. Image: Peidong Yang, UC Berkeley
Feed bacteria with gold, and they will produce more biofuel - biotechnology science news

Researchers have established that feeding the bacterium Moorella thermoacetica with gold clusters of 1 nm in size transforms them into an artificial photosynthesis system. The bacteria take up the gold particles quite efficiently, and have thus a sunlight-absorbing metal inside that is close to the enzymes involved in photosynthesis and electron transfer to generate energy. This energy can be used for the production of useful chemicals, including biofuel.

Read the full story: UC Berkeley – College of Chemistry
Scientific publication: Nature Nanotechnology