8497
In this work , we show for the first time 4 - fold tuning of unfolded , single - file translocation time through small , amine - functionalized solid - state nanopores by varying the solution pH in situ .
 Chemical: amine
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: amine