A Sensitive "Optical Nose" for Detection of Volatile Organic Molecules Based on Au@MOFs Nanoparticle Arrays through Surface-Enhanced Raman Scattering
A Sensitive "Optical Nose" for Detection of Volatile Organic Molecules Based on Au@MOFs Nanoparticle Arrays through Surface-Enhanced Raman Scattering
复制标题
基于 Au@MOFs 纳米颗粒阵列，通过表面增强拉曼散射检测挥发性有机分子的灵敏“光鼻”
DOI：
10.1002/ppsc.201900452
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发表时间：
2020-03-03
影响因子：
2.7
通讯作者：
Zhang, Tao
中科院分区：
文献类型：
--
作者：
Men, Dandan;Feng, Sujuan;Zhang, Tao
表面增强拉曼散射（Sers）是检测有毒气体和挥发性有机分子（VOM）的有效技术;然而，最近的基于SERS的气体传感器具有缺点，缺乏捕获有毒气体的有效方法和Sers基底的再现性不足。本文提出了一种将金属有机骨架与Au纳米颗粒（NP）阵列结合形成Au@ZIF-8 NP阵列的简单方法，该阵列可作为基于Sers的“光学鼻”，以良好的重现性和灵敏度检测有毒挥发性有机物。作为靶分子的甲苯在ppm水平被Au@ZIF-8 NP阵列原位识别。Au@ZIF-8 NP阵列对甲苯的分析增强因子约为1.2 × 10 ~（5）。重要的是，这种Sers底物也可以检测1-丁醇分子，这为设计通用VOM传感器提供了一种思路。此外，ZIF-8壳的涂覆方法可以扩展到合成各种NPs@ZIF-8核-壳复合物，例如Au纳米球@ZIF-8、Au@Ag纳米棒@ZIF-8、PS微球@ZIF-8和Fe 2 O3微椭圆体@ZIF-8复合物。
Surface-enhanced Raman scattering (SERS) is an effective technique for detecting toxic gas and volatile organic molecules (VOMs); however, recent SERS-based gas sensors have disadvantages and lack an effective approach to capture toxic gas and insufficient reproducibility of SERS substrates. Herein, a facile strategy is developed to integrate metal-organic frameworks with Au nanoparticle (NP) arrays to form Au@ZIF-8 NP arrays, which can be used as an "optical nose" based on SERS to detect toxic VOMs with good reproducibility and sensitivity. Toluene as a target molecule is recognized at ppm levels by the Au@ZIF-8 NP arrays in situ. And the analytical enhancement factor of Au@ZIF-8 NP arrays for toluene is about 1.2 x 10(5). Importantly, this SERS substrate can also detect the 1-butanol molecule, which provides an idea for designing a universal VOM sensor. In addition, the coating method of the ZIF-8 shell can be extended to synthetize various NPs@ZIF-8 core-shell composites, such as Au nanospheres@ZIF-8, Au@Ag nanorods@ZIF-8, PS microspheres@ZIF-8, and Fe2O3 microellipsoids@ZIF-8 composites.