A single-source precursor route to a Cu/V2O5 composites as surface-enhanced Raman scattering substrates and catalysts for cross coupling

Cai, Qian; Liao, Fan; Hu, Fei; Li, Yanqing; Wang, Tao; Shao, Mingwang

doi:10.1039/c3ra46696e

Cited by 15 publications

(8 citation statements)

References 32 publications

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“…[32,33] Besides, vanadium-based materials have been widely utilized as SERS-active substrates. [34][35][36] Pan et al reported a wavelength-dependent enhancement of R6G on V 2 O 5 nanoparticles, which can be ascribed to the photo-induced CT contribution. [34] The SERS activity of V 2 O 5 was further optimized by Wu et al via introducing oxygen vacancy defects.…”

Section: Resultsmentioning

confidence: 99%

“…[35] A Cu/ V 2 O 5 composite was obtained by Cai et al using a microwaveassisted reduction method. [36] This composite not only represents a high SERS sensitivity, but also has a better catalytic ability for Ullmann reaction. Accordingly to Mie theory, V 2 O 5 with high refractive index and low extinction coefficient is a good candidate to form high electric field on the microstructure surface in the visible-near infrared region.…”

Section: Resultsmentioning

confidence: 99%

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Hollow Multi‐Shelled V₂O₅ Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS

Guan

et al. 2021

Advanced Optical Materials

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Enhancement of the light‐matter coupling is a promising approach to improve the sensitivity and universality of semiconductor‐based surface‐enhanced Raman scattering (SERS). Herein, it is demonstrated that hollow multi‐shelled V2O5 microstructure can be utilized as an active substrate to integrate multiple synergistic contributions. The experiments and numerical simulations clearly reveal that the excellent SERS activity originates from the unique double‐shelled hollow structures, which allow multiple reflections of electromagnetic waves. This light‐trapping effect provides an efficient resonance absorption for charge‐transfer (CT) and exciton enhancements. More importantly, the coupling of outer and inner shells remarkably generates high electric field contribution for SERS enhancement. Besides, the symmetry analysis of vibrational modes based on density functional theory well explains the origin of the CT coupling of Herzberg–Teller selection rules. The synergy of all factors contributes to a significant increase in the sensitivity and universality of semiconductor SERS. It is anticipated that the strategy demonstrated in this study will widen the scope of currently available methodologies for designing substrates with high semiconductor SERS activity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Hollow Multi‐Shelled V₂O₅ Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS

Guan

et al. 2021

Advanced Optical Materials

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“…SERS technique has been proven effective in sensitive and selective detection of trace amount of molecules and metal ions. [42][43][44] The signal enhancement of Raman scattering is determined by a number of factors, such as the intrinsic properties of the metal, the nanoparticle size and interparticle distance. [45][46][47] It has been theoretically and experimentally demonstrated that the gap between two plasmonic nanoparticles (referred to as "hot spots") is the most active site to give rise to enhanced Raman scattering signals.…”

Section: Resultsmentioning

confidence: 99%

A general and rapid approach to hybrid metal nanoparticle–ZnO nanowire arrays and their use as active substrates for surface-enhanced Raman scattering detection

Liu

et al. 2016

RSC Adv.

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“…Moreover, copper is a good choice as a SERS-active substrate due to its low toxicity, conducting properties and good optical characteristics. [9][10][11][12][13] Owing to its unique electrical performance and additional chemical enhancement, 14,15 graphene is also attracting interest for SERS applications. 14,16 Reduced graphene oxide (rGO) can decrease background noise, clarifying the Raman signals of the systems being measured.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic ligand-mediated hierarchical Cu nanoparticles on reduced graphene oxides for SERS platform

Liu

et al. 2016

CrystEngComm

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Hierarchical Cu nanoparticles/rGO (CuNPs/rGO) composites were synthesized through the kinetic reaction mediated by hydrophobic methyl trioctyl ammonium chloride (A336) and 2-hydroxy-5-nonylacetophenone oxime (LIX84I). The CuNPs/rGO composites were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD), and used as substrates for surface-enhanced Raman scattering (SERS) measurements. The hierarchical CuNPs/rGO composites formed with A336 were assemblies of Cu nanosubunits with a crystal size of 5-10 nm and some observable pinholes, whereas compact Cu nanospheres and nanorods on rGO sheets were formed with LIX84I. Therefore, a hydrophobic ligand-mediated kinetic mechanism was proposed. A synergetic effect on SERS performance was observed for CuNPs/rGO composites and the ratio between CuNPs and rGO was optimized. Moreover, the SERS activity of CuNPs/rGO-A336 was much stronger than CuNPs/rGO-LIX84I owing to the hierarchical structure of CuNPs/rGO-A336. For the CuNPs/rGO-A336 substrate, the detection limit reached 10 −8 mol L −1 for R6G molecules, and quantitative SERS analysis was achieved. The CuNPs/ rGO-A336 substrate showed good reproducibility and a high enhancement factor of 2.75 × 10 6 , which is superior to other Cu-based substrates in the literature.

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A single-source precursor route to a Cu/V2O5 composites as surface-enhanced Raman scattering substrates and catalysts for cross coupling

Cited by 15 publications

References 32 publications

Hollow Multi‐Shelled V₂O₅ Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS

Hollow Multi‐Shelled V₂O₅ Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS

A general and rapid approach to hybrid metal nanoparticle–ZnO nanowire arrays and their use as active substrates for surface-enhanced Raman scattering detection

Hydrophobic ligand-mediated hierarchical Cu nanoparticles on reduced graphene oxides for SERS platform

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A single-source precursor route to a Cu/V2O5 composites as surface-enhanced Raman scattering substrates and catalysts for cross coupling

Cited by 15 publications

References 32 publications

Hollow Multi‐Shelled V2O5 Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS

Hollow Multi‐Shelled V2O5 Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS

A general and rapid approach to hybrid metal nanoparticle–ZnO nanowire arrays and their use as active substrates for surface-enhanced Raman scattering detection

Hydrophobic ligand-mediated hierarchical Cu nanoparticles on reduced graphene oxides for SERS platform

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Hollow Multi‐Shelled V₂O₅ Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS

Hollow Multi‐Shelled V₂O₅ Microstructures Integrating Multiple Synergistic Resonances for Enhanced Semiconductor SERS