6970
These probes produce the corresponding fluorescent products via multiple interfacial electron transfer processes , allowing us to investigate the photoinduced redox reactions over individual pristine and Au - nanoparticle - deposited TiO ( 2 ) nanoparticles at the single - particle , single - molecule levels .
 Chemical: Au; 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: Au; Chemical: TiO ( 2 )