18939
If the concentration of Br ( - ) ions was below this minimum value , not all of the { 100 } facets could be stabilized by the capping agent , leading to the formation of nanocubes with truncated corners .
 Br ( - )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Br ( - )