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Tailored FTO/Ag/ZIF-8 structure as SERS substrate for ultrasensitive detection.
Xue, Xiangxin; Chen, Lei; Zhao, Cuimei; Qiao, Yu; Wang, Jing; Shi, Jinghui; Lin, Yanan; Chang, Limin.
Afiliación
  • Xue X; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China. Electronic address: xuexiangxin0804@163.com.
  • Chen L; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
  • Zhao C; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
  • Qiao Y; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
  • Wang J; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
  • Shi J; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
  • Lin Y; Jilin No. 1 Middle School, 132022 Jilin, China.
  • Chang L; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China. Electronic address: changlimin2139@163.com.
Spectrochim Acta A Mol Biomol Spectrosc ; 282: 121693, 2022 Dec 05.
Article en En | MEDLINE | ID: mdl-35917613
In this work, a series of F-doped SnO2/Ag/zeolite imidazole framework (FTO/Ag/ZIF-8) sandwich structure have been successfully fabricated via a magnetic sputtering method and serve as surface-enhanced Raman scattering (SERS) substrate. The magnetic sputtering time of Ag was adjusted to obtain the optimal SERS substrate. The commonly used 4-mercaptobenzoic acid (4-MBA) molecules was selected for the SERS experiment. When the sputtering time of Ag nanoparticles (NPs) was 120 s, the FTO/Ag/ZIF-8 substrate showed the maximum SERS performance. In the system, the electromagnetic mechanism (EM) and charge-transfer (CT) enhancement mechanism have synergistic effect on the SERS phenomenon. Ag NPs was used to generate electromagnetic hot spots, which was beneficial to the EM mechanism. ZIF-8 could adsorb and capture more 4-MBA probe molecules to the hotspots. At the same time, CT happened between Ag, ZIF-8, and 4-MBA probe molecules, which was attribute to the CM mechanism. The enhancement factor (EF) of the composite SERS substrate was as high as 7.67 × 106. The detection limit of the substrate can reach 10-9 M of 4-MBA probe molecules. Moreover, the SERS templates showed good stability, the SERS signals almost unchanged after naturally kept for 6 months. Besides, due to the high sensitivity and good stability of the substrates, this work might broaden the potential practical application of SERS.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Zeolitas / Nanopartículas del Metal Tipo de estudio: Diagnostic_studies Idioma: En Revista: Spectrochim Acta A Mol Biomol Spectrosc Asunto de la revista: BIOLOGIA MOLECULAR Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Zeolitas / Nanopartículas del Metal Tipo de estudio: Diagnostic_studies Idioma: En Revista: Spectrochim Acta A Mol Biomol Spectrosc Asunto de la revista: BIOLOGIA MOLECULAR Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido