17658
The PVP / PAAc nanogel particles were characterized by dynamic light scattering ( DLS ) , zeta potential , Fourier transform infrared spectroscopy ( FTIR ) , and transmission electron microscopy ( TEM ) , and their size can be controlled by the feed composition and concentration as well as the irradiation dose .
 Chemical: PVP; Chemical: PAAc
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: PVP; Chemical: PAAc