A Novel Bio-Inspired Ag/3D-TiO₂/Si SERS Substrate with Ordered Moth-like Structure.

ABSTRACT: This paper reports a novel method to fabricate a bio-inspired SERS substrate with low reflectivity, ultra-sensitivity, excellent uniformity, and recyclability. First, double layers of polystyrene spheres with different particle sizes were assembled on the surface of a silicon wafer to act as a moth-like template. Second, through the template sacrifice method, the TiO₂ film with a three-dimensional moth-like eye structure was induced by the double-layer polystyrene spheres in the previous step, and its microscopic morphology showed a high degree of order. Finally, Ag nanoparticles were assembled on the TiO₂ film to form a bio-inspired SERS substrate. This ordered bio-inspired structure can not only reduce reflection, but also reinforce the uniformity of hotspot density

SUBMITTER: Yang J 

PROVIDER: S-EPMC9501013 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature