12018
We report a simple and effective approach for the preparation of double layer - encapsulated quantum dots ( DL - Qdots ) composed of alkyl - capping ligands to interdigitate with hydrophobic , protective agents on the surface of AgInS ( 2 ) / ZnS quantum dots ( Qdots ) , which allow phase transfer of hydrophobic Qdots from the organic phase into the aqueous phase .
 AgInS ( 2 ), ZnS
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 AgInS ( 2 ), ZnS