18860
Layers of a two - dimensional ( 2D ) zinc coordination polymer are self - assembled in the interlamellar space of a reverse microemulsion mesophase into stacks of nanosheets interleaved with cethyltrimethylammonium bromide ( CTAB ) at regular intervals , thus giving rise to a lamellar hybrid mesostructure with a lattice period of ~ 8 nm and an underlying highly crystalline substructure .
 Chemical: zinc; Chemical: cethyltrimethylammonium bromide; Chemical: CTAB
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: zinc; Chemical: cethyltrimethylammonium bromide; Chemical: CTAB