金纳米颗粒在石英基片上的表面等离子激元效应研究

Surface Plasmon Polariton Effect of Gold Nanoparticles on the Quartz Substrates

采用磁控溅射法制备了金纳米颗粒,分别用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和紫外可见分光光度仪(UV-Vis)对其形貌、结构和光谱响应进行性能表征,研究其表面等离子激元效应。结果表明,直接在石英基片上溅射制备的金纳米颗粒并未产生表面等离子激元效应;在石英基片上组装单层排列均匀的Si O2微球后,溅射制备的金纳米颗粒结构产生了明显的表面等离子激元效应;溅射功率和时长对这一效应影响明显,40 W功率溅射2~3 min所得样品吸收峰较强。

Au nanoparticles were prepared by the magnetron sputtering technique. To evaluate their surface plasmon polariton effect, the morphology and structure as well as spectral response characteristic were measured on the scanning electron microscope （SEM）, X-ray diffractometer （XRD）, and UV-Vis spectrophotometer （UV-Vis）. The results showed that Au nanoparticles prepared by magnetron sputtering directly on the quartz substrate did not produce any surface plasmon polariton effect. However, obvious effect was detected after the quartz substrates were pre-deposited with evenly aligned silica monolayer microspheres. The sputtering power and time apparently affected the effect, and a strong absorption peak developed when sputtering was carried out at a power of 40 W for 2-3min.