9046
In order to obtain independent information on the role of heterophase boundaries for fast transport in strained solid electrolytes , systematic measurements of the ( 18 ) O - tracer diffusion coefficient in nanoscaled YSZ / Y ( 2 ) O ( 3 ) multilayers were performed .
 Chemical: ( 18 ) O; Chemical: YSZ; Chemical: Y ( 2 ) O ( 3 )
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: ( 18 ) O; Chemical: YSZ; Chemical: Y ( 2 ) O ( 3 )