Optical properties of Ag@cicada wing substrate deposited by Ag nanoparticles
Optical properties of Ag@cicada wing substrate deposited by Ag nanoparticles
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DOI：
10.1016/j.cap.2020.08.013
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发表时间：
2020-11-01
影响因子：
2.4
通讯作者：
Ma, Wanli
中科院分区：
文献类型：
--
作者：
Wang, Mingli;Yan, Xiaoya;Ma, Wanli
本文以蝉翼为模板，将Ag纳米颗粒沉积在Ag@cicada翼阵列上，研究其光学特性，包括表面增强拉曼散射（SERS）、偏振和表面增强荧光（SEF）。通过调整溅射时间可以很好地控制相邻圆锥形突起之间的纳米间隙，并且最佳基底AgNPs@Ag@cicada翼阵列具有显着的SERS信号增强。对所制备的最佳基底进行表征，证明其具有优异的 SERS 性能。最佳基底在不同偏振角下SERS信号强度基本一致，表明其具有偏振无关性。 SEF光谱表明，由于Ag@cicada翼阵列和Ag纳米粒子之间的粘附力较弱，在重复检查的初始阶段，最佳基底的增强效果稍低且不稳定。出色的光学特性表明它在无标记检测和生物分析物测定方面具有巨大的潜力。
In this paper, Ag nanoparticles were deposited on Ag@cicada wing array by using the cicada wings as templates to study its optical properties, including surface enhanced Raman scattering (SERS), polarization and surface enhanced fluorescence (SEF). The nanogaps between adjacent conical protrusion can be well dominated by adjusting the sputtering time and the optimal substrate AgNPs@Ag@cicada wing arrays have a noteworthy enhancement of SERS signal. Characterization of the prepared optimal substrate certified that it possesses the excellent SERS performances. Basically consistent SERS signal strength at the different polarization angles of the optimal substrate indicates that its polarization-independence. The SEF spectra shows that the optimal substrate has a slightly lower and unstable enhancement at this initial stage of repeated examination due to the weak adhesion between the Ag@cicada wing arrays and Ag nanoparticles. The outstanding optical properties indicate that it has enormous potential in the label-free detection and biological analytes determination.