SERS hotspots distribution of the highly ordered noble metal arrays on flexible substrates

Cai, Jieyi; Liu, Ruihua; Jia, Siyi; Lin, Lin; Zhang, Zhiqiang; Wu, Shaofan; Wang, Zhezhe

doi:10.1016/j.optmat.2021.111779

Cited by 25 publications

(7 citation statements)

References 26 publications

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“…Nanomaterials for providing hot spots and enhancing Raman signals play a crucial role in SERS technology. 34,35 At the same time, the training of CNN models requires large amounts of data and high-quality datasets; therefore, a base with good uniformity and repeatability is also essential. Based on the above two points, the properties of Ag NPs and the paper-based Ag NP substrate were characterized as shown in Fig.…”

Section: Characterization Of Agnps and Paper-based Ag Np Substratementioning

confidence: 99%

Qualitative and quantitative detection and identification of two benzodiazepines based on SERS and convolutional neural network technology

Sha

Fang

Cao

et al. 2022

Analyst

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Section: Characterization Of Agnps and Paper-based Ag Np Substratementioning

confidence: 99%

Qualitative and quantitative detection and identification of two benzodiazepines based on SERS and convolutional neural network technology

Sha

Fang

Cao

et al. 2022

Analyst

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“…Nevertheless, ensuring reproducibility and accuracy remains a critical research focus for future investigations. Top-down strategies, such as e-beam lithography, nanosphere lithography, optical lithography, holographic lithography, nanoimprint lithography, and chemical etching, − have been widely utilized for fabricating nano/microstructures. It is worth noting that most of these techniques require expensive equipment, complex procedures, and high technical expertise.…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Scattering Based on Sb₂S₃ Microstructures via Femtosecond Laser Direct Writing

Tian,

Zhang,

et al. 2024

ACS Appl. Mater. Interfaces

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The noble-metal-free surface-enhanced Raman scattering (SERS) substrates have gained significant attention due to their abundant sources, signal uniformity, biocompatibility, and chemical stability. However, the lack of controllable synthesis and fabrication methods for high-SERS-activity noble-metal-free substrates hinders their practical applications. In this study, we demonstrate the use of a femtosecond laser direct writing technique to precisely manipulate and modify microstructures, resulting in enhanced SERS signals from Sb 2 S 3 nonmetal-oxide semiconductor materials. Compared with unpatterned Sb 2 S 3 samples, the Sb 2 S 3 microstructures exhibited up to a 16-fold increase in Raman scattering intensity. Interestingly, our results indicate that the femtosecond laser can induce a transformation in the crystalline state of Sb 2 S 3 and significantly enhance the Raman spectrum signal within the Sb 2 S 3 microstructures. This enhancement is also highly dependent on the period and depth of the microstructures, possibly due to the cavity effects, resulting in a stronger local field enhancement.

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“…Surface-enhanced Raman scattering (SERS) is a fast, nondestructive, high-resolution, and supersensitive fingerprint spectroscopy technique, which has been widely applied in biological science, chemistry, physics, environmental science, and other fields. − Every breakthrough of SERS is inseparable from the exploration of high-performance substrates. , Traditional SERS substrates are mainly precious metal materials (Au and Ag), which show high sensitivity due to the existence of the electromagnetic mechanism . Although they can achieve an enhancement factor (EF) of 10 6 –10 11 , − they also have their own inevitable drawbacks, such as high cost, low stability, poor biocompatibility, and so on. Compared to the precious metal substrates, semiconductor substrates based on the chemical mechanism have attracted increasing attention due to their advantages of low cost, high stability, superior biocompatibility, and diversity in species and structures. ,, However, the low EF and poor sensitivity of semiconductor substrates seriously hinder its development in the SERS field.…”

Section: Introductionmentioning

confidence: 99%

Sr-Doped TiO₂ with Positive Double Defects for a Highly Sensitive and Stable Surface-Enhanced Raman Substrate

Li,

Tang,

Wang

et al. 2023

J. Phys. Chem. C

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Surface oxygen vacancy defects and energy band defects can be synchronously regulated to accelerate the charge transfer in a semiconductor−molecule system for boosting the surface-enhanced Raman scattering (SERS) performance of a semiconductor. Herein, alkaline earth metal Sr with a low electronegativity and a large atomic radius was selected as a dopant to prepare a Sr-doped TiO 2 (Sr n TiO 2 ) SERS substrate, in which a simple Sr doping achieves a synchronous regulation of double defects (i.e., surface oxygen vacancy defect and energy level defect of Ti) in TiO 2 . Abundant surface oxygen vacancies and defect energy levels of Ti are jointly responsible for the greatly enhanced SERS performance of the substrate. On the optimal substrate Sr 0.0100 TiO 2 , the minimum detection limit of a nonresonance molecule, 4mercaptobenzoic acid, can reach 1 × 10 −9 M, and the enhancement factor is as high as 9.3 × 10 6 . To the best of our knowledge, this is the highest SERS activity among the reported semiconducting substrates, even comparable to those of precious metals. Moreover, the Sr n TiO 2 substrate shows an excellent spectral reproducibility and ultrahigh stability, which can withstand the corrosions of strong acid and alkali and even can resist the oxidation of high temperatures for SERS detection.

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SERS hotspots distribution of the highly ordered noble metal arrays on flexible substrates

Cited by 25 publications

References 26 publications

Qualitative and quantitative detection and identification of two benzodiazepines based on SERS and convolutional neural network technology

Qualitative and quantitative detection and identification of two benzodiazepines based on SERS and convolutional neural network technology

Surface-Enhanced Raman Scattering Based on Sb₂S₃ Microstructures via Femtosecond Laser Direct Writing

Sr-Doped TiO₂ with Positive Double Defects for a Highly Sensitive and Stable Surface-Enhanced Raman Substrate

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SERS hotspots distribution of the highly ordered noble metal arrays on flexible substrates

Cited by 25 publications

References 26 publications

Qualitative and quantitative detection and identification of two benzodiazepines based on SERS and convolutional neural network technology

Qualitative and quantitative detection and identification of two benzodiazepines based on SERS and convolutional neural network technology

Surface-Enhanced Raman Scattering Based on Sb2S3 Microstructures via Femtosecond Laser Direct Writing

Sr-Doped TiO2 with Positive Double Defects for a Highly Sensitive and Stable Surface-Enhanced Raman Substrate

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Product

Resources

About

Surface-Enhanced Raman Scattering Based on Sb₂S₃ Microstructures via Femtosecond Laser Direct Writing

Sr-Doped TiO₂ with Positive Double Defects for a Highly Sensitive and Stable Surface-Enhanced Raman Substrate