3845
The successful grafting of MTX and HPG onto the nanoparticles was confirmed by X - ray photoelectron spectroscopy ( XPS ) , Fourier transform infrared ( FT - IR ) spectroscopy , and UV - visible spectroscopy .
 Chemical: MTX
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: MTX