A polymer-based SERS-active substrate with gyroid-structured gold multibranches

Hsueh, Han‐Yu; Chen, Hung-Ying; Ling, Yi‐Chun; Huang, Wei-Shiang; Hung, Yu-Chueh; Gwo, Shangjr; Ho, Rong‐Ming

doi:10.1039/c4tc00431k

Cited by 42 publications

(37 citation statements)

References 46 publications

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“…We first used the GAPMM substrates to investigate the detection limit of CV molecules. As shown in Figure 6a, the SERS spectrum is still distinctly obtained at a concentration down to 10 − 12 M with the use of 25 μl of solution, which is four orders of magnitude lower than that of gyroid-structured plasmonic materials templated from block polymer systems 15 and two orders of magnitude lower than that of the commercial SERS substrate Q-SERS (as shown in Supplementary Figure S11); however, the cost of GAPMMs-4 h is far less than Q-SERS. According to the assumptions and procedures in published works, 14 the average enhancement factor for GAPMMs-4 h is estimated to be 0.8 × 10 9 under 532 nm laser excitation (as shown in the supporting information).…”

Section: Surface-enhanced Raman Spectroscopy L Wu Et Almentioning

confidence: 99%

“…The as-acquired GAPMMs demonstrated ultra-high SPR enhancement (an enhancement factor of 0.8 × 10 9 ) with superior reproducibility, uniformity and stability. For crystal violet (CV) molecules, the SERS detection limit of GAPMMs with a t d of 4 h (GAPMMs-4 h) reached 10 − 12 M, which is four orders of magnitude lower than that of the gyroid-structured Au plasmonic materials templated from block polymer systems 15 and two orders of magnitude lower than that of the commercial SERS substrates Q-SERS; however, the cost is far less than that of Q-SERS. Meanwhile, the detect limit for bis(2-ethylhexyl) phthalate (DEHP) molecules, the most frequently used plasticizer in food, paints, house-hold items, perfumes and so on, reached 1 fM, which is among the best results ever reported.…”

Section: Introductionmentioning

confidence: 99%

“…14 Gyroid-structured motifs self-assembled from block polymer systems have frequently been adopted as hard templates to fabricate Au plasmonic materials and the optical properties of such systems have been thoroughly investigated. 4,[15][16][17][18][19][20][21] Three-dimensional (3D) gyroid-structured Au nanoparticles with a unit cell size below 100 nm have been reported to show excellent SPR performance originating from the abundant exposed nanotips on the external surface. 15,17 However, the hotspots were still confined to a two-dimensional distribution of limited density and enhancement, and the merits of the gyroid morphology remain unexploited.…”

Section: Introductionmentioning

confidence: 99%

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Highly sensitive, reproducible and uniform SERS substrates with a high density of three-dimensionally distributed hotspots: gyroid-structured Au periodic metallic materials

Wang

Zhang

et al. 2018

NPG Asia Mater

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Surface-enhanced Raman spectroscopy (SERS) is an important tool for the analytical, trace detection of many inorganic and organic materials, especially for materials involved in medical care, food safety and environmental pollution. Numerous efforts have been dedicated to exploring periodic metallic materials with a high density of hotspots. However, for most periodic metallic materials fabricated by top-down and bottom-up approaches, the distribution of hotspots is restricted to one or two dimensions. Here, for the first time, we report the successful fabrication of a bio-inspired bicontinuous gyroid-structured Au SERS substrate with a high density of three-dimensionally (3D) distributed hotspots. The as-required gyroid-structured substrates were demonstrated to be highly sensitive, reproducible and uniform, with an enhancement factor of up to 10 9 . Finite-difference time domain (FDTD) simulations were conducted to reveal the mechanism leading to the high enhancement and we found that the interconnected helices in the gyroid structure not only increase the hotspot density but also contribute to increasing the scattering cross-section of the incident laser. The substrate was then adopted for the SERS detection of bis(2-ethylhexyl) phthalate, the most frequently used plasticizer in food, paints, house-hold items, perfumes and so on, and reached a detection limit of 1 fM, which is among the best results ever reported. Moreover, the mechanism deduced here will provide insight into the future design and selection of novel surface plasmonic resonance substrates, as many other bicontinuous interconnected systems are available. NPG Asia Materials (2018) 10, e462; doi:10.1038/am.2017.230; published online 12 January 2018 INTRODUCTIONThe fabrication of surface plasmonic resonance (SPR) materials with ultra-high plasmonic enhancement has long been a critical research area due to their broad applications as chemical sensors, biological sensors, plasmonic solar cells, photocatalysts and other environmentally friendly devices. 1-3 Among these applications, the most famous is the surface-enhanced Raman spectroscopy (SERS) detection of trace analytes, especially for analytes involved in medical care, food safety and environmental pollution. Various nanoparticle systems with novel nanomorphologies and their assemblies have been fabricated and reported to show excellent SPR performance. 2-5 However, SERS nanostructures composed of nanoparticles face significant challenges in achieving a reproducible and uniform Raman response due to the difficulty in fabricating uniform SERS active sites. Periodic metallic materials could provide hotspots with high density, reproducibility and uniformity, which completely meet the requirement of valid SERS substrates, and therefore numerous efforts have been dedicated to engineering periodic metallic materials with novel nanomorphologies,

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Section: Surface-enhanced Raman Spectroscopy L Wu Et Almentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly sensitive, reproducible and uniform SERS substrates with a high density of three-dimensionally distributed hotspots: gyroid-structured Au periodic metallic materials

Wang

Zhang

et al. 2018

NPG Asia Mater

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“…Therefore, many efforts have been made to employ heterogeneous Fenton catalysts for the incorporation of active iron species into various supports, such as crushed brick, activated alumina, zeolite, silica, grapheme oxide, etc. [24][25][26][27][28][29][30]. However, these supported catalysts are more or less unsatisfactory in terms of relatively low efficiency of hydrogen peroxide utilization, or being expensive of the starting material for Fenton catalysts.…”

Section: Introductionmentioning

confidence: 98%

Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Gao

Wang

Zhang

2015

Applied Catalysis B: Environmental

170

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“…Copyright 1999, American Physical Society. A2 simulates results demonstrating the plasmonic resonance of the G structure under an incident laser; reproduced with permission . Copyright 2014, The Royal Society of Chemistry.…”

Section: Introductionmentioning

confidence: 99%

Engineering Gyroid‐Structured Functional Materials via Templates Discovered in Nature and in the Lab

Zhang

2015

Small

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In search of optimal structures for functional materials fabrication, the gyroid (G) structure has emerged as a promising subject of widespread research due to its distinct symmetry, 3D interconnected networks, and inherent chiral helices. In the past two decades, researchers have made great progress fabricating G-structured functional materials (GSFMs) based on G templates discovered both in nature and in the lab. The GSFMs demonstrate extraordinary resonance when interacting with light and matter. The superior properties of GSFMs can be divided into two categories based on the dominant structural properties, namely, dramatic optical performances dominated by short-range symmetry and well-defined texture, and effective matter transport due to long-range 3D interconnections and high integrity. In this review, G templates suitable for fabrication of GSFMs are summarized and classified. State-of-the-art optical applications of GSFMs, including photonic bandgap materials, chiral devices, plasmonic materials, and matamaterials, are systematically discussed. Applications of GSFMs involved in effective electron transport and mass transport, including electronic devices, ultrafiltration, and catalysis, are highlighted. Existing challenges that may hinder the final application of GSFMS together with possible solutions are also presented.

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A polymer-based SERS-active substrate with gyroid-structured gold multibranches

Abstract: A 3D SERS-active substrate synthesized using a hydrolyzed PS-PLLA as a template for gyroid-structured Au multibranches with sharp tips and corners was used to detect crystal violet and β-carotene with superior sensitivity and high reproducibility and stability.

Cited by 42 publications

References 46 publications

Highly sensitive, reproducible and uniform SERS substrates with a high density of three-dimensionally distributed hotspots: gyroid-structured Au periodic metallic materials

Highly sensitive, reproducible and uniform SERS substrates with a high density of three-dimensionally distributed hotspots: gyroid-structured Au periodic metallic materials

Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Engineering Gyroid‐Structured Functional Materials via Templates Discovered in Nature and in the Lab

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