Three-dimensional noble-metal nanostructure: A new kind of substrate for sensitive, uniform, and reproducible surface-enhanced Raman scattering

Tian, Chen; You, Hongjun; Fang, Jixiang

doi:10.1088/1674-1056/23/8/087801

Cited by 7 publications

(5 citation statements)

References 105 publications

(153 reference statements)

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“…These spots effectively enhance the local electric field and boost the emission from analyte molecules in the nanogap and neck areas. This effect has also been demonstrated in previous studies (Supporting Information, Figure S4) [2,11,32,33]. Finally, we used the Ag-NP/Si-NW as a SERS substrate for the detection of the neurotransmitter DA.…”

Section: Resultssupporting

confidence: 77%

Reusable Surface-Enhanced Raman Spectroscopy Substrates Made of Silicon Nanowire Array Coated with Silver Nanoparticles Fabricated by Metal-Assisted Chemical Etching and Photonic Reduction

Bai

Wang

et al. 2019

Nanomaterials

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Surface-enhanced Raman spectroscopy (SERS) has advanced over the last four decades and has become an attractive tool for highly sensitive analysis in fields such as medicine and environmental monitoring. Recently, there has been an urgent demand for reusable and long-lived SERS substrates as a means of reducing the costs associated with this technique To this end, we fabricated a SERS substrate comprising a silicon nanowire array coated with silver nanoparticles, using metal-assisted chemical etching followed by photonic reduction. The morphology and growth mechanism of the SERS substrate were carefully examined and the performance of the fabricated SERS substrate was tested using rhodamine 6G and dopamine hydrochloride. The data show that this new substrate provides an enhancement factor of nearly 1 × 108. This work demonstrates that a silicon nanowire array coated with silver nanoparticles is sensitive and sufficiently robust to allow repeated reuse. These results suggest that this newly developed technique could allow SERS to be used in many commercial applications.

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Section: Resultssupporting

confidence: 77%

Reusable Surface-Enhanced Raman Spectroscopy Substrates Made of Silicon Nanowire Array Coated with Silver Nanoparticles Fabricated by Metal-Assisted Chemical Etching and Photonic Reduction

Bai

Wang

et al. 2019

Nanomaterials

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“…It is important to prepare SERS active substrates with better enhancement, good uniformity, reliable stability, and reproducibility . Therefore, many research reports focus on the preparation of SERS active substrates with controllable morphology and good reproducibility, including the metal hydrosol nanomaterial , nanoparticle membranes in orderly arrangement composed of one‐dimensional metal nanoparticles which are closely packed or arranged and long‐range ordered metal nanoparticles or metal composite nanostructures . TFME provides novel ideas for the synthesis of SERS active substrate because of the uniform macroscopic planar structure of the extraction film, which is beneficial to combine with SERS active material and improve the reproducibility.…”

Section: Sers Active Substratementioning

confidence: 99%

A review of developments and applications of thin‐film microextraction coupled to surface‐enhanced Raman scattering

et al. 2019

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Surface‐enhanced Raman scattering (SERS) greatly expands the applications of Raman spectroscopy and is a promising technique for food safety, environmental analysis, and public safety. Thin‐film microextraction (TFME) provides an efficient sample preparation method for SERS to improve its selectivity and detection efficiency. This review comprehensively describes the development and applications of SERS and TFME, including the history, mechanisim, and active substrate of SERS and the theory, device, forms, and practical applications of TFME. The applications of TFME‐SERS in food safety and environment monitoring are discussed, which could improve their advantages. TFME extracts and enriches the target analytes to eliminate the interfering substance, providing a facial way for SERS to analyze the target analytes in complex matrices. The development of TFME‐SERS technology not only expands the application range of TFME, but greatly improves the anti‐interference ability and detection sensitivity of SERS. Thus, the established methods are fast, convenient, and highly sensitive. This technology is potential to be applied in the on‐site and real‐time detection.

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“…Consequently, extensive research has been conducted to synthesize silver nanoparticles with controllable morphology and distribution. Various techniques, including chemical methods, microwave techniques, and biological synthesis, have been employed to synthesize silver nanoparticles with diverse shapes, such as spheres, rods, wires, sheets, cubes, and arrays [13][14][15][16][17][18][19][20] . These methods each have their own advantages for specific synthesis purposes.…”

Section: Introductionmentioning

confidence: 99%

Controlling the absorption region of multi-shaped silver nanoparticles for SERS applications

Nguyen,

Luong,

Pham

et al. 2024

Sci. Tech. Dev. J.

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Introduction: Silver nanoparticles (Ag NPs) are pivotal in advancing surface-enhanced Raman scattering (SERS) due to their exceptional plasmonic properties. Yet, conventional synthesis methods often fail to precisely control their shape and size, impacting SERS efficiency. This study introduces a novel synthesis approach using hydrogen peroxide (H2O2) to tailor Ag NP morphologies, aiming to optimize their plasmonic resonance for improved SERS detection of hazardous substances. Methods: We utilized a chemical reduction process with H2O2 to etch and shape Ag NPs, adjusting H2O2 concentrations to control nanoparticle morphology. The characterization of the nanoparticles involved SEM, TEM, and XRD for morphology and structure, with UV-Vis spectroscopy determining their absorption spectra. Results: The approach yielded Ag NPs with variable shapes and absorption wavelengths (330 nm to 740 nm), directly correlating H2O2 concentration with morphological changes. SEM and TEM showed diverse nanoparticle shapes, and XRD confirmed their crystalline structure. Notably, nanoparticles tuned to specific absorption wavelengths significantly enhanced SERS detection of Rhodamine B. Conclusion: Our method effectively produces multi-shaped Ag NPs with tunable optical properties, enhancing SERS application in detecting trace organic compounds. This streamlined synthesis process offers new possibilities for environmental monitoring and safety assessments.

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Three-dimensional noble-metal nanostructure: A new kind of substrate for sensitive, uniform, and reproducible surface-enhanced Raman scattering

Abstract: Tian Cui-Feng(田翠锋) a)b) , You Hong-Jun(尤红军) a) † , and Fang Ji-Xiang(方吉祥) a) ‡

Cited by 7 publications

References 105 publications

Reusable Surface-Enhanced Raman Spectroscopy Substrates Made of Silicon Nanowire Array Coated with Silver Nanoparticles Fabricated by Metal-Assisted Chemical Etching and Photonic Reduction

Reusable Surface-Enhanced Raman Spectroscopy Substrates Made of Silicon Nanowire Array Coated with Silver Nanoparticles Fabricated by Metal-Assisted Chemical Etching and Photonic Reduction

A review of developments and applications of thin‐film microextraction coupled to surface‐enhanced Raman scattering

Controlling the absorption region of multi-shaped silver nanoparticles for SERS applications

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