20628
Crystalline rubrene films , evidenced by XRD and marked by platelet features in AFM images , become observable when grown onto the CdA layer thicker than 5L .
 Chemical: rubrene; Chemical: CdA
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: rubrene; Chemical: CdA