Controllable fabrication of large-scale hierarchical silver nanostructures for long-term stable and ultrasensitive SERS substrates

Optically trapped SiO2@Au particle-dye hybrid-based SERS detection of Hg2+ ions

“…The corresponding peak assignment is tabulated in ESI Table 1, † and it shows that the spectral features agree well with the literature data. 41,42 The detection limit of crystal violet is estimated by considering 910 cm −1 peak intensity (Fig. 3(d)) and is found to be 6.8 pM.…”

Toward Plasmon-Controlled Generation of the Activating Ag Hotspot Nanospheres for Quantitative SERS Analysis

“…The typical peaks of CV molecules were clearly observed at the low concentration of 10 −6 M (presented in Figure 6(a)). Certain CV characteristic peaks have been identified at wavenumbers 800, 908, 1166, and 1611 cm −1 , which result from C-H bending vibrations, radical-ring skeletal vibrations, C-C center -C bonding, and C-C stretching vibrations of the phenyl ring, respectively 36,37 . The Ra- man characteristic peaks of the CV target molecules have been observed on the Ag-15 platform, showing relatively lower intensity compared to other samples.…”

Increasing charge transfer of SERS by the combination of amorphous Al2O3–Al thin film and ZnO nanorods decorated with Ag nanoparticles for trace detection of metronidazole

“…This is because these platforms not only support CT between the SERS substrate and the absorbed molecules but also direct nanostructure morphologies on which the noble metal is located. Consequently, it is very effective to achieve a highly sensitive SERS substrate made from the combination of noble metals and semiconductor nanostructures, such as the combination of Ag NPs, or Au NPs with ZnO, 6–11 AZO, 12 TiO 2 , 13,14 Al 2 O 3 , 15,16 Cu 2 ZnSnS 4, 17 Si, 18 Cu 2 O, 19 Fe 3 O 4 , 20 ZnO–CuO 21 … and recently, the 2D materials such as MoS 2 , 22 graphene. 23–25 The morphology of ZnO nanomaterials could be easily controlled for nanorods, nanowires, nanoneedles, and nanotubes.…”

“…3,29 Studies on this combination structure are still rare, most researchers only focus on studying SERS with the separate semiconductor with nanoparticles (NPs) such as ZnO/NPs or Al 2 O 3 /NPs to enhance the Raman signal by EM. 6,15,16,27,30,31…”

“…3,29 Studies on this combination structure are still rare, most researchers only focus on studying SERS with the separate semiconductor with nanoparticles (NPs) such as ZnO/ NPs or Al 2 O 3 /NPs to enhance the Raman signal by EM. 6,15,16,27,30,31 For the reasons mentioned above, this study proposes a SERS substrate structure of Ag/Al 2 O 3 -Al/ZnO NRs with a high-enhancement Raman signal. ZnO nanorods (NRs) are grown on the glass slide by wet chemical bath method, then an oxidized aluminum thin lm is deposited onto the ZnO NRs by vacuum thermal evaporation, and nally, Ag NPs are decorated on the substrate by DC magnetron sputtering.…”