8138
The resultant nanoparticles were homogenously coated with poly ( allylamine hydrochloride ) ( PAH ) to make the surface of the composite nanoparticles positively charged , which would enhance cellular uptake driven by electrostatic interactions between the positive surface of the nanoparticles and the negative surface of the cancer cell .
 poly ( allylamine hydrochloride ), PAH
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 poly ( allylamine hydrochloride ), PAH