7344
Analysis of the particle formation as a function of irradiation time shows that the particles evolve from Co ( OH ) ( 2 ) to CoOOH and then to Co ( 3 ) O ( 4 ) .
 Chemical: Co ( OH ) ( 2 ); Chemical: CoOOH; Chemical: Co ( 3 ) O ( 4 )
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: Co ( OH ) ( 2 ); Chemical: CoOOH; Chemical: Co ( 3 ) O ( 4 )