9590
In this work , we fabricated a series of mixed shell micelles ( MSMs ) with approximately the same size , charge and core composition but with varied hydrophilic / hydrophobic ratios in the shell through spontaneously self - assembly of block copolymers poly ( ethylene glycol ) - block - poly ( l - lysine ) ( PEG - b - PLys ) and poly ( N - isopropylacrylamide ) - block - poly ( aspartic acid ) ( PNIPAM - b - PAsp ) in aqueous medium .
 Chemical: poly ( ethylene glycol ) - block - poly ( l - lysine ); Chemical: PEG - b - PLys; Chemical: poly ( N - isopropylacrylamide ) - block - poly ( aspartic acid ); Chemical: PNIPAM - b - PAsp
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: poly ( ethylene glycol ) - block - poly ( l - lysine ); Chemical: PEG - b - PLys; Chemical: poly ( N - isopropylacrylamide ) - block - poly ( aspartic acid ); Chemical: PNIPAM - b - PAsp