2969
Complex yet appealing rutile TiO ( 2 ) flower films are , for the first time , directly hydrothermally grown on a transparent conducting fluorine - doped tin oxide ( FTO ) substrate .
 Chemical: TiO ( 2 ); Chemical: fluorine - doped tin oxide; Chemical: FTO
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 ); Chemical: fluorine - doped tin oxide; Chemical: FTO