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Polyvinylpyrrolidone ( PVP ) was used during the synthesis process which would assist the self - assembly of the metal nanoparticles and polymer backbones into the intercalated structure .
 Chemical: Polyvinylpyrrolidone; Chemical: PVP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Polyvinylpyrrolidone; Chemical: PVP