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Here we demonstrate that the boron nitride nanomesh , a corrugated single layer of hexagonal boron nitride ( h - BN ) with a 3 . 2 nm honeycomb superstructure formed on a Rh ( 111 ) surface , can trap individual argon atoms at distinct subsurface sites at room temperature .
 Chemical: boron nitride; Chemical: boron nitride; Chemical: h - BN; Chemical: Rh ( 111 ); Chemical: argon
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: boron nitride; Chemical: boron nitride; Chemical: h - BN; Chemical: Rh ( 111 ); Chemical: argon