8446
The regular growth of helical monolayers without excessive adsorption and the formation of amide bonds were confirmed by ultraviolet - visible ( UV - vis ) spectrophotometry , quartz crystal microbalance ( QCM ) , ellipsometry , and infrared reflection - absorption spectroscopy ( IR - RAS ) measurements .
 Chemical: amide; Chemical: quartz
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: amide; Chemical: quartz