9201
In aqueous dispersion IONP had an average hydrodynamic diameter of 25 nm and were stable over six days in most test media , which could also be predicted by stability modelling .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None