24980
Enhancing Raman Scattering without Plasmons : Unprecedented Sensitivity Achieved by TiO2 Shell - Based Resonators .
 Chemical: TiO2
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: TiO2