Highly-sensitive SERS detection of tetracycline: Sub-enhancement brought by light scattering of nano-diamond

Pei, Jingxuan; Tian, Zhenfei; Yu, Xingwen; Zhang, Shuting; Ma, Shiqing; Sun, Yibo; Boukherroub, Rabah

doi:10.1016/j.apsusc.2022.155270

Cited by 10 publications

(1 citation statement)

References 74 publications

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“…Additionally, we investigated SERS responses using dimethyl sulfoxide (DMSO) and crystal violet (CV) molecules, which demonstrate the broad applicability of our substrate for molecular detection. Notably, dielectric and semiconductor-based NRs display strong multiple light scattering and local trapping, which contribute to optical enhancements in photovoltaic cells and photodetectors. − These mechanisms can markedly enhance Raman signals, which support the broad molecular applicability of our SERS substrate as compared with other semiconductor oxide nanowires that need energy-level matching. Furthermore, NR shapes have advantages for surface chemical modifications because of their high surface-to-volume ratio.…”

Section: Introductionmentioning

confidence: 76%

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO₃ Semiconductor Nanorods with Strong Light Scattering in the Visible Regime

Yang,

Dang,

et al. 2024

ACS Appl. Mater. Interfaces

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Recent developments in semiconductor-based surface-enhanced Raman scattering (SERS) have achieved numerous advancements, primarily centered on the chemical mechanism. However, the role of the electromagnetic (electromagnetic mechanism) contribution in advancing semiconductor SERS substrates is still underexplored. In this study, we developed a SERS substrate based on densely aligned α-type MoO 3 (α-MoO 3 ) semiconductor nanorods (NRs) with rectangular parallelepiped ribbon shapes with width measuring several hundred nanometers. These structural attributes strongly affect light transport in the visible range by multiple light scattering generated in narrow gaps between NRs, contributing to the improvement of SERS performance. Engineering the nanostructure and chemical composition of NRs realized high SERS sensitivity with an enhancement factor of 2 × 10 8 and a low detection limit of 5 × 10 −9 M for rhodamine 6G (R6G) molecules, which was achieved by the stoichiometric NR sample with strong light scattering. Furthermore, it was observed that the scattering length becomes significantly shorter compared with the excitation wavelength in the visible regime, which indicates that light transport is strongly modified by mesoscopic interference related to Anderson localization. Additionally, high electric fields were found to be localized on the NR surfaces, depending on the excitation wavelength, similar to the SERS response. These optical phenomena indicate that electromagnetic excitation processes play an important role in plasmon-free SERS platforms based on α-MoO 3 NRs. We postulate that our study provides important guidance for designing effective EM-based SERS-active semiconductor substrates.

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Section: Introductionmentioning

confidence: 76%

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO₃ Semiconductor Nanorods with Strong Light Scattering in the Visible Regime

Yang,

Dang,

et al. 2024

ACS Appl. Mater. Interfaces

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All‐Organic Piezo‐Photocatalytic Film with Highly Efficient Catalysis, Weak‐Force Excitation, and Recyclability

Liu,

Tong,

Zhuang

et al. 2024

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Polyaniline (PANI), a typical organic photocatalyst, has an adjustable structure and good stability, can be easily synthesized on a large scale, and is economical. PANI is doped with ions to regulate its internal structure and improve its photocatalytic performance. However, its photocatalytic performance is limited by the doping concentration and its intrinsic properties, hindering its further application. Herein, PANI films with a piezo‐photocatalytic function are fabricated to improve photocatalytic performance and explore their self‐powered environmental purification property. PANI/poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) sandwich films, with PVDF‐HFP as the interlayer, are prepared by introducing a piezoelectric field into PANI photocatalysts, thereby achieving excellent piezo‐photocatalytic performance. The as‐fabricated piezo‐photocatalyst degrades methyl orange at a rate of 91.2% after 60 min under magnetic stirring. Owing to the low Young's modulus of the all‐organic catalyst, self‐powered purification is realized using the PANI/PVDF‐HFP film. Leaf surfaces are functionalized by loading the film in them for removing pollutants under sunlight and water flow. Thus, this study proposes a common strategy, wherein a piezoelectric interlayer is introduced to load the organic photocatalyst for preparing an all‐organic piezo‐photocatalyst. This piezo‐photocatalyst can be easily recycled and responds to weak forces, realizing its application for self‐powered environmental purification.

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Role of holes in microwave-induced catalyst Co3O4 for efficient high-concentration tetracycline degradation

Tian

et al. 2023

Applied Surface Science

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Highly-sensitive SERS detection of tetracycline: Sub-enhancement brought by light scattering of nano-diamond

Cited by 10 publications

References 74 publications

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO₃ Semiconductor Nanorods with Strong Light Scattering in the Visible Regime

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO₃ Semiconductor Nanorods with Strong Light Scattering in the Visible Regime

All‐Organic Piezo‐Photocatalytic Film with Highly Efficient Catalysis, Weak‐Force Excitation, and Recyclability

Role of holes in microwave-induced catalyst Co3O4 for efficient high-concentration tetracycline degradation

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Highly-sensitive SERS detection of tetracycline: Sub-enhancement brought by light scattering of nano-diamond

Cited by 10 publications

References 74 publications

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO3 Semiconductor Nanorods with Strong Light Scattering in the Visible Regime

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO3 Semiconductor Nanorods with Strong Light Scattering in the Visible Regime

All‐Organic Piezo‐Photocatalytic Film with Highly Efficient Catalysis, Weak‐Force Excitation, and Recyclability

Role of holes in microwave-induced catalyst Co3O4 for efficient high-concentration tetracycline degradation

Contact Info

Product

Resources

About

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO₃ Semiconductor Nanorods with Strong Light Scattering in the Visible Regime

Plasmon-Free Surface-Enhanced Raman Spectroscopy Using α-Type MoO₃ Semiconductor Nanorods with Strong Light Scattering in the Visible Regime