Ag@SiO<sub>2</sub> nanocube loaded miniaturized filter paper as a hybrid flexible plasmonic SERS substrate for trace melamine detection

Mekonnen, Menbere Leul; Su, Wei‐Nien; Chen, Ching‐Hsiang; Hwang, Bing‐Joe

doi:10.1039/c7ay02192e

Cited by 24 publications

(9 citation statements)

References 53 publications

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“…In this way, plasmonic structures could be fabricated to any desired configuration to meet the requirements for ultrasensitive SERS assay but require complex fabrication processes. Self-assembly [13, 14] is an effective approach to organize well-ordered nanostructures from various nanoparticles with controllable interparticle spacing, and avoid problems from lithography method, such as high cost, low yield, the complex processing procedures, and the dependence on special equipments. Significant progress has been made on the preparation of aligned silver nanowires films by self-assembly.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the flexibility substrate, with high detective sensitivity, may be prospective in real-world SERS applications. Flexible SERS substrate is composed of plasmonic nanostructure which is incorporated into flexible materials such as paper [14], cotton [23], carbon nanotubes [24], graphene [25], and polymer materials [26]. Martín [27] reported flexible ordered vertical Au nanorod arrays and the detection limit was 5 nM using crystal violet (CV) as the detecting probe.…”

Section: Introductionmentioning

confidence: 99%

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Flexible and Superhydrophobic Silver Nanoparticles Decorated Aligned Silver Nanowires Films as Surface-Enhanced Raman Scattering Substrates

Wang

2019

Nanoscale Res Lett

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Flexible and superhydrophobic silver nanoparticles decorated aligned silver nanowires (AgNWs@AgNPs) films were employed as efficient surface-enhanced Raman scattering (SERS) substrates to investigate the SERS properties of the Rhodamine B (RB). Aligned silver nanowires were fabricated via interface self-assembly technique and incorporated into shape memory polyurethane (SMPU) by hot-press method, which not only endow the composites with ordered array characteristics but also flexibility due to the presence of polymer. After an electrochemical deposition combined with a galvanic reaction, AgNWs@AgNPs was obtained. At last, the substrate was functioned with perfluorodecanethiol (PFDT), and the target flexible and superhydrophobic silver nanoparticles decorated aligned silver nanowires substrate was obtained. The substrate confines water droplet in a small area, and the analytes were enriched owing to the concentrating effect. The SERS assay using the as-synthesized flexible and superhydrophobic silver films as substrates can detect Rhodamine B as low as10 −10 M. The mechanism is thought to relate to the formation of robust superhydrophobic film, which is based on micro- and nanoscaled hierarchical structure provided by the AgNWs@AgNPs layer, strong adhesion between the SMPU film and the AgNWs@AgNPs layer, and the low surface energy molecule adsorption on the silver surface. The combined superhydrophobic and flexible properties endow the SERS substrate with improved detection limit for practical SERS applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible and Superhydrophobic Silver Nanoparticles Decorated Aligned Silver Nanowires Films as Surface-Enhanced Raman Scattering Substrates

Wang

2019

Nanoscale Res Lett

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“…Hence, it can be engaged in real-time inspection of melamine contamination. The SERS-based determination of melamine was further established using Ag@SiO 2 nanocubes by Su and Hwang's research groups [225]. The above nanocube materials displayed the linearity to melamine from 0.5 to 7.93 µM at 684 cm −1 with a LOD of 0.48 µM.…”

Section: Other Nanostructures In Melamine Discriminationmentioning

confidence: 99%

Review on Nanomaterial-Based Melamine Detection

Shellaiah

Sun

2019

Chemosensors

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Illegal adulteration of milk products by melamine and its analogs has become a threat to the world. In 2008, the misuse of melamine with infant formula caused serious effects on babies of China. Thereafter, the government of China and the US Food and Drug Administration (FDA) limited the use of melamine of 1 mg/kg for infant formula and 2.5 mg/kg for other dairy products. Similarly, the World Health Organization (WHO) has also limited the daily intake of melamine of 0.2 mg/kg body weight per day. Many sensory schemes have been proposed by the scientists for carrying out screening on melamine poisoning. Among them, nanomaterial-based sensing techniques are very promising in terms of real-time applicability. These materials uncover and quantify the melamine by means of diverse mechanisms, such as fluorescence resonance energy transfer (FRET), aggregation, inner filter effect, surface-enhanced Raman scattering (SERS), and self-assembly, etc. Nanomaterials used for the melamine determination include carbon dots, quantum dots, nanocomposites, nanocrystals, nanoclusters, nanoparticles, nanorods, nanowires, and nanotubes. In this review, we summarize and comment on the melamine sensing abilities of these nanomaterials for their suitability and future research directions.

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“…SERS technique has overcome the low sensitivity of normal Raman spectroscopy, and highly sensitive analysis down to the single molecule can be achieved with SERS . Due to the fingerprint characteristics of SERS spectroscopy, it could be applied for trace detection of contaminants in complex food matrixes . The suitability of trace detection applications in food depends on the enhancement degree of the Raman signal and the preparation of nanomaterial is critical for the application and development of SERS technology .…”

Section: Introductionmentioning

confidence: 99%

“…[6,7] Due to the fingerprint characteristics of SERS spectroscopy, it could be applied for trace detection of contaminants in complex food matrixes. [8][9][10][11][12] The suitability of trace detection applications in food depends on the enhancement degree of the Raman signal and the preparation of nanomaterial is critical for the application and development of SERS technology. [13][14][15] The enhancement effect of SERS substrate is determined by the hot spots and plamonics enhancement produced by nanoparticles, which is greatly affected by the morphology and size of nanoparticles.…”

mentioning

confidence: 99%

Fabrication of flexible paper‐based Surface‐enhanced Raman scattering substrate from Au nanocubes monolayer for trace detection of crystal violet on shell

Lin

Song

et al. 2019

J Raman Spectroscopy

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Surface‐enhanced Raman scattering (SERS) substrate is the key to SERS technology and it is still a basic focus to fabricate desirable SERS substrates offering multiple advantages of strong Raman enhancement and good reproducibility and portability. A flexible paper‐based SERS substrate were fabricated involving the use of Au nanocubes (NCs) monolayer. Au NCs were generated with tunable size in the range of 24 to 63 nm through seed‐mediated growth method. The effect of support on SERS properties of Au NCs–assembled monolayer was systemically explored. As a result, more excellent SERS performance could be obtained by assembling Au NCs on the filter paper. Besides, the influence of Au NCs' size on SERS‐enhanced effect of paper‐based substrate was also investigated. Our results clearly indicated that paper‐based substrate with 39 nm Au NCs possessed the optimal SERS enhancement. This SERS substrate exhibited high sensitivity with enhancement factor (EF) up to 9.75 × 107 and demonstrated good uniformity and time stability. Furthermore, based on this superior paper‐based SERS substrate with advantage of powerful sample extraction performance, the measurement of crystal violet (CV) on shell surface were successfully carried out with detection limit down to 2.17 × 10−7 M. And linear quantification were achieved in the range from 5 × 10−5 to 5 × 10−7 M. To sum up, the as‐prepared SERS substrate is applicable for on‐site detection and analysis of CV on various shell surfaces.

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Ag@SiO₂ nanocube loaded miniaturized filter paper as a hybrid flexible plasmonic SERS substrate for trace melamine detection

Abstract: An inexpensive flexible plasmonic substrate exploiting the intrinsic properties of paper and anisotropic Ag@SiO2 nanocubes with improved SERS activity is demonstrated.

Cited by 24 publications

References 53 publications

Flexible and Superhydrophobic Silver Nanoparticles Decorated Aligned Silver Nanowires Films as Surface-Enhanced Raman Scattering Substrates

Flexible and Superhydrophobic Silver Nanoparticles Decorated Aligned Silver Nanowires Films as Surface-Enhanced Raman Scattering Substrates

Review on Nanomaterial-Based Melamine Detection

Fabrication of flexible paper‐based Surface‐enhanced Raman scattering substrate from Au nanocubes monolayer for trace detection of crystal violet on shell

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Ag@SiO2 nanocube loaded miniaturized filter paper as a hybrid flexible plasmonic SERS substrate for trace melamine detection

Abstract: An inexpensive flexible plasmonic substrate exploiting the intrinsic properties of paper and anisotropic Ag@SiO2 nanocubes with improved SERS activity is demonstrated.

Cited by 24 publications

References 53 publications

Flexible and Superhydrophobic Silver Nanoparticles Decorated Aligned Silver Nanowires Films as Surface-Enhanced Raman Scattering Substrates

Flexible and Superhydrophobic Silver Nanoparticles Decorated Aligned Silver Nanowires Films as Surface-Enhanced Raman Scattering Substrates

Review on Nanomaterial-Based Melamine Detection

Fabrication of flexible paper‐based Surface‐enhanced Raman scattering substrate from Au nanocubes monolayer for trace detection of crystal violet on shell

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Ag@SiO₂ nanocube loaded miniaturized filter paper as a hybrid flexible plasmonic SERS substrate for trace melamine detection