10621
In addition , the obtained nanocomposites give high performance in oxygen sensing with high sensitivity ( I ( 0 ) / I ( 100 ) = 5 . 2 ) , good Stern - Volmer characteristics ( R ( 2 ) = 0 . 9995 ) , and short response / recovery times ( t v = 6 s and t ^ = 12 s ) .
 Chemical: oxygen
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: oxygen