| http://www.w3.org/ns/prov#value | - rf is not gold is a question commonly asked of Professor Jim Johnston - research leader of a process and product the media were quick to nickname 'the golden fleece'.The scarf could have been any one of a range of colours, all dyed with pure gold nanoparticles, Jim says.Nanoparticles interact with light differently according to their size due to a phenomenon known as surface plasmon resonance, a
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