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- W4309198248 abstract "Surface enhanced Raman spectroscopy (SERS) is a rapid and ultrasensitive analytical technique. For practical applications, it is highly desirable to explore metal/semiconductor hybrid substrates, which utilize the synergistic enhancement effects of plasmons and charge transfer (CT). Herein, we successfully fabricated Ag nanoparticles decorated ZnAl LDHs nanosheets (Ag-ZnAl) by a facile one-pot solvothermal growth method and investigated the SERS performance. When 4-nitrobenzenethiol (4-NBT) was used as the probe molecule, the detection limit reaches as low as 1 × 10−10 M and the enhancement factor is 1.7 × 105. A systematic experimental study revealed that the unique structure of LDH facilitates formation of densely distributed Ag NPs with good dispersibility, providing abundant “hot spots” for electromagnetic enhancement. Moreover, Ag-ZnAl hybrid has a higher concentration of oxygen vacancies, which can promote photo-induced CT for chemical enhancement. Furthermore, first principles calculations demonstrated that Ag-ZnAl hybrid has improved adsorption ability of 4-NBT through the formation of Ag-S and NOH bonds, which can facilitate charge transfer process and increase Raman intensity of 4-NBT. This work provides an effective strategy to design easy-to-fabricated metal/semiconductor hybrids as SERS sensing platform." @default.
- W4309198248 created "2022-11-24" @default.
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- W4309198248 date "2023-03-01" @default.
- W4309198248 modified "2023-09-29" @default.
- W4309198248 title "Spontaneous synthesis of Ag nanoparticles decorated ZnAl layered double hydroxides for synergistically improved SERS activity" @default.
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- W4309198248 doi "https://doi.org/10.1016/j.apsusc.2022.155701" @default.
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