Tunable localized surface plasmon resonance (LSPR) was achieved on thermally annealed thin films composed of Au deposited on Ag. Characterization of the crystallographic structure, morphology, and optical properties of the thin films was done by X-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscopy (AFM), UV–VIS-NIR double-beam spectrometer, and Raman system. The XRD results confirmed that thermal annealing improved the grain growth and orientation of Au/Ag bimetallic thin films. AFM and SEM results showed that Au/Ag bimetallic thin films transformed into Au/Ag ellipsoid nanoparticles (NPs) on thermal annealing. The LSPR wavelength of Au/Ag NPs could be tuned between 500 nm and 342 nm. Additionally, the Raman scattering could be adjusted by increasing the thickness of Ag in the Au/Ag bimetallic composite structure.

在由沉积在Ag上的Au组成的热退火薄膜上实现了可调谐的局部表面等离子体激元共振（LSPR）。通过X射线衍射（XRD），扫描电子显微镜（SEM），原子力显微镜（AFM），UV-VIS-NIR双光束光谱仪对薄膜的晶体结构，形态和光学性质进行表征，和拉曼系统。XRD结果证实，热退火改善了Au / Ag双金属薄膜的晶粒生长和取向。原子力显微镜和扫描电镜结果表明，金/银双金属薄膜在热退火后转变为金/银椭圆形纳米颗粒（NPs）。Au / Ag NPs的LSPR波长可在500 nm至342 nm之间调整。另外，可以通过增加Au / Ag双金属复合结构中Ag的厚度来调节拉曼散射。