Sensing and Bio-Sensing Research Pub Date : 2020-08-12 , DOI: 10.1016/j.sbsr.2020.100374 Jialin Ji , Zhengwang Li , Weiyuan Sun , Hongyu Wang
The surface plasmon resonance wavelength in a gold film above silver nanospheres on a silica substrate was measured using transmission absorption spectroscopy. The structure, surface morphology, and optical properties of the gold/silver nanosphere thin films were investigated using X-ray diffraction (XRD), atomic force microscopy (AFM), UV-VIS-NIR double beam spectrometry, and Raman spectroscopy, respectively. The silver nanospheres were fabricated by simple thermal annealing. A gold film with thickness ranging from 2 to 50 nm on top of the silver nanospheres exhibits a blue-shift in the resonance wavelength from 590 to 510 nm. Surface-enhanced Raman scattering (SERS) is also reported in this paper. Additionally, finite-difference time-domain (FDTD) simulations were used to describe surface plasmon resonance in the samples, and the numerical results were consistent with experimental results.
中文翻译:
银纳米球上金膜通过光吸收的表面等离振子共振调谐
使用透射吸收光谱法测量二氧化硅基板上的银纳米球上方的金膜中的表面等离子体共振波长。分别使用X射线衍射(XRD),原子力显微镜(AFM),UV-VIS-NIR双光束光谱和拉曼光谱研究了金/银纳米球薄膜的结构,表面形态和光学性质。通过简单的热退火来制备银纳米球。在银纳米球顶部的厚度范围为2至50 nm的金膜在590至510 nm的共振波长处呈现蓝移。本文还报道了表面增强拉曼散射(SERS)。此外,有限差分时域(FDTD)模拟用于描述样品中的表面等离子体共振,