14852
Efficient preparation of both secondary and tertiary linker amides as judged by X - ray photoelectron spectroscopy ( XPS ) and water droplet contact angle was achieved with an improved amide bond formation on gold quartz crystal microbalance ( QCM ) sensors using 2 - ( 1H - 7 - azabenzotriazol - 1 - yl ) - 1 , 1 , 3 , 3 - tetramethyl hexafluorophosphate methanaminium uronium ( HATU ) .
 Chemical: secondary and tertiary linker amides; Chemical: amide; Chemical: quartz; Chemical: 2 - ( 1H - 7 - azabenzotriazol - 1 - yl ) - 1 , 1 , 3 , 3 - tetramethyl hexafluorophosphate methanaminium uronium; Chemical: HATU
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: secondary and tertiary linker amides; Chemical: amide; Chemical: quartz; Chemical: 2 - ( 1H - 7 - azabenzotriazol - 1 - yl ) - 1 , 1 , 3 , 3 - tetramethyl hexafluorophosphate methanaminium uronium; Chemical: HATU