A plasmonic and SERS dual-mode iodide ions detecting probe based on the etching of Ag-coated tetrapod gold nanostars

Chen, Xiaohong; Zhu, Jian; Li, Jianjun; Zhao, Jun-Wu

doi:10.1007/s11051-019-4604-4

Cited by 5 publications

(1 citation statement)

References 43 publications

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“…As listed in Table 3, the intensity of the Raman shifts of RhB concentrations of 10 −5 M, 10 −6 M, 10 −8 M, and 10 −9 M were 17,795 counts, 6137 counts, 2279 counts, and 1243 counts, respectively. Thus, the detection limit of the sample was lower than 10 −9 M, which was much better than the previous reports [16,30,31]. The Raman spectrum of the Au-Ag film with 10 −1 M RhB adsorbed was also measured, as shown in Figure 4.…”

Section: Resultsmentioning

confidence: 69%

Electrochemical Dealloying Preparation and Morphology Evolution of Nanoporous Au with Enhanced SERS Activity

Luo

et al. 2023

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Nanoporous Au (NPG) prepared by dealloying is one of the most used substrates for surface-enhanced Raman scattering (SERS). The morphology tailoring of the NPG to obtain both ultrafine pores and suitable Au/Ag ratio is of great importance for the acquiring of enhanced SERS performance. Compared with the chemical dealloying, the electrochemical dealloying can tailor the NPG to be more flexible by the additional adjustment of dealloying voltage and current. Thus, further understanding on the morphology evolution of NPG during the electrochemical dealloying to obtain enhanced SERS performance is of great importance. In the presented work, the morphology and composition evolution of the NPG film during the electrochemical dealloying was investigated. NPG films with a stable pore diameter of approximately 11 nm as well as diverse compositions were obtained by electrochemical dealloying an Au-Ag alloy film. The prepared NPG film exhibits an enhanced SERS activity with an enhancement factor (EF) of 7.3 × 106 and an excellent detection limit of 10−9 M. This work provides insights into the morphology and composition evolution of the NPG during the electrochemical dealloying process to obtain enhanced SERS performance.

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Section: Resultsmentioning

confidence: 69%