Ag Nanosphere-Internalized Nanocavity Arrays

SERS EF 3.5×10⁸ at 4 nm gap

Precisely positioned Ag nanospheres at the bottom of Au nanocavities, separated by an ALD alumina layer that suppresses quantum tunneling, enable strong plasmon coupling with high homogeneity and reproducibility, and can be fabricated on flexible substrates.

Song, Changkun · Hongbiao, Huo · Shi, Wei · Xu, Jianyong · Lei, Xiaoting · Gu, Bonan · Zhongbo, Han · Zhang, Wenchao

Sensors and Actuators, B: Chemical 2025

Specifications

间隙

{'zh': '4', 'en': ''} nm

RSD

{'zh': '7.8', 'en': '< 7.8'} %

Advantages

Fabricable on flexible polyimide substrate