Ag(x)@WO₃ core-shell nanostructure for LSP enhanced chemical sensors.

ABSTRACT: Exceptional properties of graphene have triggered intensive research on other 2D materials. Surface plasmon is another subject being actively explored for many applications. Herein we report a new class of core-shell nanostructure in which the shell is made of a 2D material for effective plasmonic propagation. We have designed a much enhanced chemical sensor made of plasmonic Ag(x)@(2D-WO3) that combines above advantages. Specifically, the sensor response increases from 38 for Ag(x)-WO3 mixture to 217 for the Ag(x)@(2D-WO3) core-shell structure; response and recovery time are shortened considerably to 2 and 5 seconds; and optimum sensor working temperature is lowered from 370°C to 340°C. Light irradiation is found to increase the Ag(x)@(2D-WO3) sensor response, particularly at blue wavelen

SUBMITTER: Xu L 

PROVIDER: S-EPMC4206871 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature