State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, People's Republic of China.
Nanotechnology. 2020 May 15;31(20):205501. doi: 10.1088/1361-6528/ab72b7. Epub 2020 Feb 4.
Three-dimensional (3D) surface enhanced Raman scattering (SERS) substrates were produced by magnetic force assisting self-assembled nanoparticles in arrayed holes. Compared to '2D' plasmonic structures used in conventional SERS substrates, the 'hot spots' existed on whole depth of the 3D SERS substrates, which greatly enhanced the sensitivity. The prepared 3D SERS substrate was able to detect 4-aminothiophenol with a concentration down to 1 pM. Furthermore, the substrate was applied to detect hexachlorobenzene residue in soil, indicating its great potential for rapid and sensitive detection of extreme low concentrated molecules, especially pollutants residues in foods and environments.
三维（3D）表面增强拉曼散射（SERS）基底通过磁场辅助自组装纳米颗粒在阵列孔中形成。与传统 SERS 基底中使用的“二维”等离子体结构相比，3D SERS 基底上的“热点”存在于整个深度，极大地提高了灵敏度。所制备的 3D SERS 基底能够检测到浓度低至 1 pM 的 4-巯基苯胺。此外，该基底还用于检测土壤中的六氯苯残留，表明其在快速灵敏检测极低浓度分子方面具有巨大潜力，特别是食品和环境中污染物残留。
