Sea urchin-like K2Ti8O17 substrate: Facile synthesis and improved Surface-Enhanced Raman scattering (SERS) performance

Sui, Jiaxi; Liu, Dongdong; Wang, Qianqian; Wang, Limin; Zhong, Bo; Ma, Yuanyuan

doi:10.1016/j.jallcom.2022.167864

Cited by 5 publications

(3 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(a) EFRI provided by the optimal SERS substrate and the optimal SMC-SERS system with the 5 μm SiO 2 microsphere for various CV concentrations. A comparative survey of (b) enhanced factor and (c) detection limits for dye molecules over the past few years. ,,− ,− …”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Trace Detection of Dye Molecules Based on Scanning Microsphere-Coupled Surface-Enhanced Raman Spectroscopy

Rao,

Yang,

Yuan

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

Ultrasensitive detection of trace substances holds significant importance in chemical analysis and biochemical sensing. As an exceptionally robust spectroscopic technique, surface-enhanced Raman spectroscopy offers significant advantages in the trace detection of analytes on various plasmonic noble-metal substrates. The recent integration of plasmonic nanostructures with nonplasmonic microcavities has emerged as a promising approach to enhance the sensitivity of Raman detection further. In this work, we developed an ultrasensitive scanning microsphere-coupled surface-enhanced Raman spectroscopy system and applied it to detect trace dye molecules. We found that based on conventional surface-enhanced Raman substrates with Au nanostructure films, the enhancement factor of Raman intensity can reach the level of ∼109 through optimizing conditions. By incorporating a scanning silica dielectric microsphere, the Raman signals can be further enhanced by two orders of magnitude, resulting in an enhancement factor as high as ∼1011 and corresponding to a detection limit of 10–13 M for an aqueous crystal violet solution. Note that the detection limit reached the best performance ever recorded. The enhancement mechanism of dielectric microspheres is explained well by theoretical simulations. Additionally, our technique allows the spectroscopic imaging of trace analytes over a region, providing a facile strategy to fabricate hybrid Raman enhancers for ultrasensitive, highly efficient, and cost-effective sensing applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Trace Detection of Dye Molecules Based on Scanning Microsphere-Coupled Surface-Enhanced Raman Spectroscopy

Rao,

Yang,

Yuan

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…57,58 Researchers have reported successful SERS enhancement using metal oxide-based substrates, paving the way for sensitive chemical detection analysis. 51,[57][58][59][60][61][62][63][64][65][66][67][68] The PL arising from both the substrate and adsorbed molecules as a broad-continuum background reduces the signal of Raman tags in SERS spectroscopy. Therefore, controlling the PL generated from the substrate and adsorbed molecules to amplify the SERS signal is a challenge.…”

Section: Various Inorganic Semiconductors For Sersmentioning

confidence: 99%

“…57,58 Researchers have reported successful SERS enhancement using metal oxide-based substrates, paving the way for sensitive chemical detection analysis. 51,57–68…”

Section: Inorganic Semiconductor Sers-active Substratesmentioning

confidence: 99%