期刊
SURFACES AND INTERFACES
卷 35, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.surfin.2022.102440
关键词
Annealing process; Surface -enhanced Raman spectrometry; Phosphoethanolamine; High-pressure; Deep-sea
类别
资金
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA22050100]
- National Natural Science Foundation of China [92058206]
- Key project of Ocean Research Center, Chinese Academy of Sciences [COMS2020J03]
- Young Taishan Scholars Program [tsqn201909158]
- Natural Science Foundation of Shandong Province [ZR2019BD029]
- China Postdoctoral Science Foundation [2020M682245]
- Synergetic Extreme Condition User Facility (SECUF)
- Project of ROV KEXUE [KEXUE2019GZ06]
The surface morphology of metal particles can be adjusted by the annealing process to enhance Raman activity. A SERS substrate with silver nanospheres coated with a silver nanoisland structure was prepared in this study. The substrate showed high enhancement for Rh B and sensitivity to PETA.
The surface morphology of metal particles can be adjusted by the annealing process to enhance the activity of Raman substrate and achieve an ultra-low concentration detection limitation. In this study, a surface-enhanced Raman scattering (SERS) substrate of coccinellaseptempunctate-like silver nanospheres coated with a silver nanoisland structure (Ag NI@Ag NSs) was prepared using a simple annealing process. Numerous silver nano -spheres were dispersed on the surface of the silver nanoislands, which exhibited a single crystal plane (111) orientation. The SERS substrate had an enhancement factor of 108 for Rhodamine B (Rh B) and was highly sensitive to phosphoethanolamine (PETA). The SERS response toward PETA showed excellent correlation during the range of 5 x 10-7 -1 x 10-5 mol/L with the detection limitation as low as 5 x 10-7 mol/L, and the cor-relation coefficient is 0.9918. The simulated high-pressure test showed that the SERS response could be still observed at 1100 m sub ocean pressure even with a PETA concentration of 1 mM. The test results of selectivity, reproducibility, and accuracy indicated that the Ag NI@Ag NS sensor possessed potential applications in the deep-sea analytical and other related fields.
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