19086
Surface - enhanced Raman scattering spectra of adsorbates on Cu 2 O nanospheres : charge - transfer and electromagnetic enhancement .
 Chemical: Cu 2 O
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: Cu 2 O