标题： 氮化硼纳米片作为金纳米颗粒增强表面拉曼光谱的改进和可重复使用基底 显示英文标题

标题： Boron Nitride Nanosheets as Improved and Reusable Substrates for Gold Nanoparticles Enabled Surface Enhanced Raman Spectroscopy

摘要： 原子薄的氮化硼（BN）纳米片已被发现是贵金属颗粒的优良基底，可实现表面增强拉曼光谱（SERS），得益于它们对芳香分子的良好吸附性、高热稳定性和弱拉曼散射。通过一种简单但可控且可重复的溅射和退火方法，在BN纳米片上合成了具有棱角的金（Au）纳米颗粒。Au颗粒的尺寸和密度可以通过溅射时间、电流和退火温度等进行控制。在相同的溅射和退火条件下，不同厚度的BN上的Au颗粒表现出不同的尺寸，因为Au的表面扩散系数取决于BN的厚度。有趣的是，尽管BN纳米片上装饰的Au颗粒具有相似的形貌和分布，但其拉曼增强效果优于硅基底以及块体BN晶体。此外，BN纳米片显示没有明显的SERS信号，因此不会对分析物的拉曼信号造成干扰。Au/BN基底可通过在空气中加热去除吸附的分析物而被重复使用，且不会损失SERS增强效果。 显示英文摘要

摘要： Atomically thin boron nitride (BN) nanosheets have been found an excellent substrate for noble metal particles enabled surface enhanced Raman spectroscopy (SERS), thanks to their good adsorption of aromatic molecules, high thermal stability and weak Raman scattering. Faceted gold (Au) nanoparticles have been synthesized on BN nanosheets by a simple but controllable and reproducible sputtering and annealing method. The size and density of the Au particles can be controlled by sputtering time, current and annealing temperature etc. Under the same sputtering and annealing conditions, the Au particles on BN of different thicknesses show various sizes because the surface diffusion coefficients of Au depends on the thickness of BN. Intriguingly, decorated with similar morphology and distribution of Au particles, BN nanosheets exhibit better Raman enhancements than silicon substrate as well as bulk BN crystals. Additionally, BN nanosheets show no noticeable SERS signal and hence cause no interference to the Raman signal of analyte. The Au/BN substrates can be reused by heating in air to remove adsorbed analyte without loss of SERS enhancement.