26065
Adsorption enthalpies obtained from ab initio molecular dynamics employing non - local optB88 - vdW functional were in excellent agreement with the experimental data , indicating that the functional can cover physical phenomena behind adsorption of organic molecules on graphene sufficiently well .
 Chemical: graphene
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: graphene