3784
Although thermodynamics clearly drives most processes under ambient conditions toward the formation of an oxide layer , kinetic control of the oxidation processes and thermodynamic tricks based on gaining stability of surface monolayers with high - density assembly have allowed for the formation of stable Si - C bonds and Si - O - C linkages on oxide - free silicon crystals .
 Si - C, Si - O - C, silicon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Si - C, Si - O - C, silicon