18841
Adsorption of a series of primary substituted hydrocarbons ( RX ; C18H37PO ( OH ) 2 ( ODPA ) , C17H35COOH , C18H37OH , C18H37NH2 , and C18H37SH ) onto solid gallium substrates with and without UV / ozone treatment was studied using contact angle goniometry , spectroscopic ellipsometry , and cyclic voltammetry ( CV ) .
 Chemical: hydrocarbons; Chemical: C18H37PO ( OH ) 2; Chemical: ODPA; Chemical: C17H35COOH; Chemical: C18H37OH; Chemical: C18H37NH2; Chemical: C18H37SH; Chemical: gallium; Chemical: ozone
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: hydrocarbons; Chemical: C18H37PO ( OH ) 2; Chemical: ODPA; Chemical: C17H35COOH; Chemical: C18H37OH; Chemical: C18H37NH2; Chemical: C18H37SH; Chemical: gallium; Chemical: ozone