8142
The interaction of PPCA - based particles with Pd acetate also leads to aggregation because of interparticle interactions , but the aggregates that are formed are much smaller .
 Chemical: PPCA; Chemical: Pd acetate
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: PPCA; Chemical: Pd acetate