14769
By controlling the environment , temperature , and duration , joined Cu ( 2 ) O or CuO nanotube stacked chips can be achieved , which serve as a platform for the further development of nanostructured , stacked devices .
 Chemical: Cu ( 2 ) O; Chemical: CuO
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: Cu ( 2 ) O; Chemical: CuO