21216
The aim of this study was to design thiolated surface stabilized superparamagnetic iron oxide nanoparticles ( TSS - SPIONs ) for efficient internalization with high MRI sensitivity .
 Chemical: iron oxide
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