14519
A facile , flexible and large - scale technique was proposed to prepare a CuO - CNT 3D - network composite with the aid of electrostatic interactions in aqueous solution .
 Chemical: CuO
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: CuO