5392
The carrier mobility can reach about 1500 cm ( 2 ) V ( - 1 ) s ( - 1 ) , which is about three times the value of those grown on SiO ( 2 ) / Si substrates , and also is better than some examples of metal - catalyzed graphene , reflecting the good quality of the graphene lattice .
 Chemical: SiO ( 2 ); Chemical: Si; Chemical: graphene; Chemical: graphene
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: SiO ( 2 ); Chemical: Si; Chemical: graphene; Chemical: graphene