A ternary functional Ag@GO@Au sandwiched hybrid as an ultrasensitive and stable surface enhanced Raman scattering platform

Zhang, Cong yun; Hao, Rui; Zhao, Bin; Hao, Yaowu; Liu, Ya Qing

doi:10.1016/j.apsusc.2017.03.023

Cited by 35 publications

(7 citation statements)

References 41 publications

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“…Combining Au and Ag can make full use of their individual advantages and synergistic effects for improved chemical and plasmonic properties 24 . Most recently, researchers found that sandwich structures prepared by embedding semiconductors in two layers of plasmonic noble metals showed very high Raman enhancement due to multidimensional plasma coupling 25 . Ternary nanocomposites can have more SERS-active hot spots at the interfaces between noble metals and semiconductors, and Raman signals can be enhanced by several times due to the combined effect of CT and electromagnetic enhancement 26 .…”

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confidence: 99%

Self-sustainable and recyclable ternary Au@Cu2O–Ag nanocomposites: application in ultrasensitive SERS detection and highly efficient photocatalysis of organic dyes under visible light

Zheng

Kou

et al. 2021

Microsyst Nanoeng

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Ternary noble metal–semiconductor nanocomposites (NCs) with core–shell–satellite nanostructures have received widespread attention due to their outstanding performance in detecting pollutants through surface-enhanced Raman scattering (SERS) and photodegradation of organic pollutants. In this work, ternary Au@Cu2O–Ag NCs were designed and prepared by a galvanic replacement method. The effect of different amounts of Ag nanocrystals adsorbed on the surfaces of Au@Cu2O on the SERS activity was investigated based on the SERS detection of 4-mercaptobenzoic acid (4-MBA) reporter molecules. Based on electromagnetic field simulations and photoluminescence (PL) results, a possible SERS enhancement mechanism was proposed and discussed. Moreover, Au@Cu2O–Ag NCs served as SERS substrates, and highly sensitive SERS detection of malachite green (MG) with a detection limit as low as 10−9 M was achieved. In addition, Au@Cu2O–Ag NCs were recycled due to their superior self-cleaning ability and could catalyze the degradation of MG driven by visible light. This work demonstrates a wide range of possibilities for the integration of recyclable SERS detection and photodegradation of organic dyes and promotes the development of green testing techniques.

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confidence: 99%

Self-sustainable and recyclable ternary Au@Cu2O–Ag nanocomposites: application in ultrasensitive SERS detection and highly efficient photocatalysis of organic dyes under visible light

Zheng

Kou

et al. 2021

Microsyst Nanoeng

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“…The Raman spectrum of GO in Figure 1b indicated a D band at 1353 cm −1 and a G band at 1580 cm −1 , which were assigned to the disordered phase (SP 3 hybridization) and graphitic phase (SP 2 hybridization) of the carbon atom, respectively. [ 27 ] The intensity ratio of D peak to G peak ( I D / I G ) can be used to evaluate the defect degree in the GO sheet. The value of I D / I G increased from 0.951 to 1.081 with the increase in GO content, which indicated the altered structural regularity because the increased carbon atoms in GO transformed from sp 2 hybrid to sp 3 hybrid.…”

Section: Resultsmentioning

confidence: 99%

Rapid Self‐Expansion Behavior of the PMMA‐Based Bone Cement with P(MMA‐AA)‐GO Nano‐Units

Chen

Tang

Zhao

et al. 2021

Macro Materials & Eng

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The volume shrinkage of polymethylmethacrylate (PMMA) bone cement is typically addressed by incorporating additives into the matrix. However, the maximum water absorption and swelling capacity of the composite bone cement are not sufficiently improved due to its rapid solidification. In this work, poly(methyl methacrylate‐acrylic acid)‐grafted graphene oxide [P(MMA‐AA)‐GO] nano‐units with the microsphere‐lamellar structure are synthesized, and then P(MMA‐AA)‐GO bone cement (PGBC) is fabricated. The rate of absorption and swelling of PGBC are significantly promoted by the microsphere–lamellar structure of P(MMA‐AA)‐GO nano‐units, achieving maximum absorption and swelling capacity of PGBC before its solidification. PGBC 4 exhibits the maximum equilibrium simulate body fluid (SBF) absorption ratio and equilibrium swelling ratio of 90.2% ± 1.7% and 92.5% ± 4.5%, respectively. Interestingly, the maximum compression strength of the composite before immersion is also observed in PGBC 4 with a value of 77.2 ± 1.1 MPa. The enhanced compression strength of PGBC overcomes the bottleneck of the decreased compression strength resulting from the enhanced absorption behavior. Therefore, PGBC with rapid self‐expansion behavior and improved mechanical properties can not only reduce the injection volume to avoid leakage in the clinic but also provide sufficient mechanical support, which has promising application potential in the clinical setting.

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“…The enhancement factor of GO/AgNPs on pyramidal-shaped PMMA for R6G was estimated to reach 8.1 × 10 9 [125]. Zhang et al reported a unique ternary hybrid structure of AgNPs, GO, and AuNPs with a high enhancement factor (see Table 1) [126]. Therefore, GO-and rGO-based SERS can sense various molecules, and its sensing ability can be improved by changing the synthesis conditions and structure of the substrate.…”

Section: Graphene-based Sers and Its Synthesis A Go-and Rgo-basmentioning

confidence: 99%

Synthesis of Graphene-based Materials for Surface-Enhanced Raman Scattering Applications

Suzuki

2019

e-J. Surf. Sci. Nanotechnol.

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Raman spectroscopy provides a meaningful fingerprint for sensing and discriminating materials, and surface-enhanced Raman scattering (SERS) can dramatically increase Raman signals up to the single-molecule level of sensitivity. Graphene, a monolayer carbon sheet, has recently attracted considerable attention as a unique SERS substrate. However, there are various types of graphene materials, and the SERS application category is significantly correlated to the structure and quality of the graphene. This review provides a broad perspective on this research area, intended for researchers of diverse fields. First, we categorize the graphene-based SERS applications based on their structure. Second, we introduce the types of graphene (graphene oxide, reduced graphene oxide, chemical vapor deposited graphene, and carbon nanowalls) and their synthesis methods. Thereafter, we highlight state-of-the-art studies for each category of graphene-based SERS.

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A ternary functional Ag@GO@Au sandwiched hybrid as an ultrasensitive and stable surface enhanced Raman scattering platform

Cited by 35 publications

References 41 publications

Self-sustainable and recyclable ternary Au@Cu2O–Ag nanocomposites: application in ultrasensitive SERS detection and highly efficient photocatalysis of organic dyes under visible light

Self-sustainable and recyclable ternary Au@Cu2O–Ag nanocomposites: application in ultrasensitive SERS detection and highly efficient photocatalysis of organic dyes under visible light

Rapid Self‐Expansion Behavior of the PMMA‐Based Bone Cement with P(MMA‐AA)‐GO Nano‐Units

Synthesis of Graphene-based Materials for Surface-Enhanced Raman Scattering Applications

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