Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China.
Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2019 Apr 5;212:371-379. doi: 10.1016/j.saa.2019.01.018. Epub 2019 Jan 15.
In this work, hierarchical flower-like gold microstructures (HFGMs) are synthesized on a flexible PET film substrate by electrochemical deposition method as a SERS sensor without surfactant or directing agent. The effects of deposition current and electrolyte concentration on morphology and SERS performance are discussed to find the optimal preparation conditions. SERS activity of samples with different morphologies was investigated by comparing experiments and the mechanism was discussed. It shows the HFGMs with 3D nanoflakes and nanosheet tips present outstanding SERS activity with ultrasensitive detection limits. The lowest concentration of R6G that can be detected is 10 M, and the characteristic signals of thiram can be detected as low as 0.1 ppm. The HFGMs substrate show great potential of application in trace detection by SERS.
在这项工作中，通过电化学沉积法在柔性 PET 薄膜基底上合成了分层花状金微结构（HFGMs），无需表面活性剂或导向剂即可作为 SERS 传感器。讨论了沉积电流和电解质浓度对形态和 SERS 性能的影响，以找到最佳的制备条件。通过比较实验研究了不同形态样品的 SERS 活性，并讨论了其机理。结果表明，具有 3D 纳米片和纳米片尖端的 HFGMs 具有出色的 SERS 活性和超灵敏的检测极限。可检测到的最低 R6G 浓度为 10-10 M，最低可检测到 thiram 的特征信号为 0.1 ppm。HFGMs 基底在 SERS 痕量检测中具有很大的应用潜力。
