27467
Ultrahigh responsivity ( 0 . 57 A / W ) of few - layer MoS2 at 532 nm is due to the high optical absorption ( ~ 10 % despite being less than 2 nm in thickness ) and a high photogain , which sets up a new record that was not achievable in 2D nanomaterials previously .
 Chemical: MoS2
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: MoS2 
Answer:
 Chemical: MoS2