14509
Metal nitride ( Ni ( 0 . 33 ) Co ( 0 . 67 ) ) N nanoparticles are prepared by nitridation using NiCo ( 2 ) O ( 4 ) as a precursor material by heating at 335 degrees C for 2 h in flowing NH ( 3 ) + N ( 2 ) gas and characterized by X - ray diffraction ( XRD ) , field emission - scanning electron microscopy ( FE - SEM ) , high resolution - transmission electron microscopy ( HR - TEM ) , along with selective area electron diffraction ( SAED ) and X - ray absorption spectroscopy ( XAS ) techniques .
 Chemical: Metal nitride; Chemical: ( Ni ( 0 . 33 ) Co ( 0 . 67 ) ) N; Chemical: NiCo ( 2 ) O ( 4 ); Chemical: NH ( 3 ); Chemical: N ( 2 )
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: Metal nitride; Chemical: ( Ni ( 0 . 33 ) Co ( 0 . 67 ) ) N; Chemical: NiCo ( 2 ) O ( 4 ); Chemical: NH ( 3 ); Chemical: N ( 2 )