16153
Stable aqueous dispersions of superparamagnetic iron oxide nanoparticles were synthesized in one step in the presence of a zwitterionic siloxane as the stabilizing / capping / solubilizing ligand .
 Chemical: iron oxide; Chemical: zwitterionic siloxane
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: iron oxide; Chemical: zwitterionic siloxane