Facilely Flexible Imprinted Hemispherical Cavity Array for Effective Plasmonic Coupling as SERS Substrate.
Jihua XuJinmeng LiGuangxu GuoXiaofei ZhaoZhen LiShicai XuChonghui LiBaoyuan ManJing YuChao ZhangPublished in: Nanomaterials (Basel, Switzerland) (2021)
The focusing field effect excited by the cavity mode has a positive coupling effect with the metal localized surface plasmon resonance (LSPR) effect, which can stimulate a stronger local electromagnetic field. Therefore, we combined the self-organizing process for component and array manufacturing with imprinting technology to construct a cheap and reproducible flexible polyvinyl alcohol (PVA) nanocavity array decorating with the silver nanoparticles (Ag NPs). The distribution of the local electromagnetic field was simulated theoretically, and the surface-enhanced Raman scattering (SERS) performance of the substrate was evaluated experimentally. The substrate shows excellent mechanical stability in bending experiments. It was proved theoretically and experimentally that the substrate still provides a stable signal when the excited light is incident from different angles. This flexible substrate can achieve low-cost, highly sensitive, uniform and conducive SERS detection, especially in situ detection, which shows a promising application prospect in food safety and biomedicine.
Keyphrases
- label free
- gold nanoparticles
- silver nanoparticles
- low cost
- sensitive detection
- high resolution
- high throughput
- structural basis
- raman spectroscopy
- loop mediated isothermal amplification
- cardiovascular disease
- high frequency
- quantum dots
- type diabetes
- high density
- energy transfer
- real time pcr
- electron transfer
- mass spectrometry
- fluorescent probe
- molecularly imprinted
- solid phase extraction