5335
The effect of the C vacancy on the physisorption modes of H ( 2 ) was investigated as a function of H ( 2 ) binding energy within the energy window ( - 0 . 2 to - 0 . 6 eV ) targeted by the Department of Energy ( DOE ) , and as functions of a variety of other physicochemical properties .
 Chemical: C; Chemical: H ( 2 ); Chemical: H ( 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: C; Chemical: H ( 2 ); Chemical: H ( 2 )