多功能 Zn-Al 层状双氢氧化物用于表面增强拉曼散射和表面增强红外吸收。

Multifunctional Zn-Al layered double hydroxides for surface-enhanced Raman scattering and surface-enhanced infrared absorption.

机构信息

Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.

出版信息

Dalton Trans. 2019 Jan 2;48(2):426-434. doi: 10.1039/c8dt03807d.

DOI:10.1039/c8dt03807d

PMID:30403237

Abstract

Surface-enhanced Raman scattering (SERS) and surface-enhanced infrared absorption (SEIRA) are complementary techniques, and both provide fingerprint structural information on various materials with a high sensitivity. Herein, Zn-Al layered double hydroxides (LDHs) are proposed for the first time as highly sensitive and uniform substrates for both SERS and SEIRA. Zn-Al LDHs show a remarkable SERS effect with an enhancement factor (EF) as high as 1.637 × 104 by using 4-mercaptobenzoic acid (4-MBA) as the probe molecule, where the charge transfer and hydrogen bonds are believed to result in the SERS effect. Interestingly, Zn-Al LDHs also exhibit SEIRA by using 4-methoxybenzenethiol (4-MTP), where the resultant substrates possess excellent long-term stability. This study not only presents a facile route to fabricate LDH materials, but also provides a novel substrate that can be used in both SERS and SEIRA.

摘要

表面增强拉曼散射（SERS）和表面增强红外吸收（SEIRA）是互补的技术，两者都能以高灵敏度提供各种材料的指纹结构信息。在此，首次提出 Zn-Al 层状双氢氧化物（LDHs）作为 SERS 和 SEIRA 的高灵敏度和均匀基底。Zn-Al LDHs 表现出显著的 SERS 效应，使用 4-巯基苯甲酸（4-MBA）作为探针分子时，增强因子（EF）高达 1.637×104，其中电荷转移和氢键被认为是产生 SERS 效应的原因。有趣的是，Zn-Al LDHs 也通过使用 4-甲氧基苯硫酚（4-MTP）表现出 SEIRA，其中得到的基底具有优异的长期稳定性。这项研究不仅提供了一种制备 LDH 材料的简单途径，还提供了一种可用于 SERS 和 SEIRA 的新型基底。