7492
Detailed characterization of the obtained brushes using static water contact angle measurements , X - ray photoelectron spectroscopy , electrochemical impedance spectroscopy , and polarization - modulation reflection - absorption infrared spectroscopy is presented .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None