8565
In particular , we shall consider the special role of molecules that tend to accumulate at the phase boundaries , that is , at the contact lines , which will therefore be denoted " line - actants " ( molecules that adsorb at a 1D interface , separating two 2D colloidal entities ) , by analogy to the term " surfactant " ( which indicates a molecule that adsorbs at a 2D interface separating two 3D colloidal entities ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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