5050
Diatoms are one of the most successful photosynthetic organisms and given the important role that their shells ( frustules ) play in light trapping we explored their use in multilayered materials for application as photoanodes in dye sensitised solar cells ( DSSCs ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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