2968
Dye - sensitized solar cells ( DSSCs ) based on hierarchical rutile TiO ( 2 ) flower clusters prepared by a facile , one - pot hydrothermal process exhibit a high efficiency .
 Chemical: TiO ( 2 )
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: TiO ( 2 )