Li Yanlin, Yang Sen, Lu Xuegang, Duan Wenyuan, Moriga Toshihiro
Key Laboratory of Advanced Functional Materials and Mesoscopic Physics, School of Science, Xi'an Jiaotong University Xi'an 710049 China
Department of Chemical Science and Technology, Graduates School of Advanced Technology and Science, Tokushima University Tokushima 770-8506 Japan.
RSC Adv. 2019 Jan 22;9(6):2877-2884. doi: 10.1039/c8ra09569h.
FeO-Ag Janus composites were synthesized using a two-step solvothermal method. The optimal growth process was determined by investigating the relationship between the particle morphologies and reaction time. Magnetic and Raman spectroscopic measurements showed that the as-synthesized Janus composites have both good magnetic response and significant surface-enhanced Raman scattering (SERS) effects, as well as reproducibility. The calculated Raman enhancement factor reached an unprecedented magnitude of 10 compared with the values of other FeO-Ag compounds. Furthermore, the SERS effect was exhibited even at a concentration of probe molecules as low as 10 M. This demonstrates that the as-synthesized FeO-Ag Janus composite particles have promise for application as separable, highly sensitive SERS substrates.
采用两步溶剂热法合成了FeO-Ag Janus复合材料。通过研究颗粒形态与反应时间之间的关系确定了最佳生长过程。磁性和拉曼光谱测量表明，所合成的Janus复合材料具有良好的磁响应和显著的表面增强拉曼散射（SERS）效应，以及可重复性。与其他FeO-Ag化合物的值相比，计算得到的拉曼增强因子达到了前所未有的10的量级。此外，即使在探针分子浓度低至10 M时也表现出SERS效应。这表明所合成的FeO-Ag Janus复合颗粒有望用作可分离的高灵敏度SERS基底。
