Self-assembly of plasmonic nanostructures into superlattices for surface-enhanced Raman scattering applications

Li, Rui; Li, Shasha; Liu, Jingfu

doi:10.1016/j.trac.2017.09.003

Cited by 21 publications

(15 citation statements)

References 98 publications

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“…Moreover, these interfacial arrays can be used for multiphase detection, or as the precursor to produce solid plasmonically active films. However, despite the number of excellent recent reviews which discuss the fabrication of SERS substrates using nanoparticle selfassembly, [23][24][25] reviews which are dedicated specifically to the discussion of nanoparticle self-assembly at water-oil interfaces for SERS remain scarce. In this review, we will introduce the general strategies for assembling plasmonic nanoparticles into densely packed 2D arrays at water-oil interfaces, as well as the associated advantages/disadvantages of using these materials for SERS.…”

Section: Introductionmentioning

confidence: 99%

Self-assembly of colloidal nanoparticles into 2D arrays at water–oil interfaces: rational construction of stable SERS substrates with accessible enhancing surfaces and tailored plasmonic response

Chen

et al. 2021

Nanoscale

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Section: Introductionmentioning

confidence: 99%

Self-assembly of colloidal nanoparticles into 2D arrays at water–oil interfaces: rational construction of stable SERS substrates with accessible enhancing surfaces and tailored plasmonic response

Chen

et al. 2021

Nanoscale

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“…However, these developed methods have not satisfied the detection limit and precision applicable to clinical practice so far. Surface-enhanced Raman spectroscopy (SERS), a common trace detection method, has been widely used in biology, medical, environmental protection, and food detection because of its advantages of high sensitivity, fast speed, and low signal interference (Liu et al, 2017;Sun et al, 2017;Neng et al, 2020;Nowicka et al, 2021). SERS enhancement effect was mainly attributed to the combination of electromagnetic mechanism (EM) and chemical mechanism (CM), which referred to the local surface plasmon resonance (LSPR) and electron transfer between adsorbed molecules and nanomaterials, respectively (Xu et al, 2018;Yu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

SERS Based Lateral Flow Assay for Rapid and Ultrasensitive Quantification of Dual Laryngeal Squamous Cell Carcinoma-Related miRNA Biomarkers in Human Serum Using Pd-Au Core-Shell Nanorods and Catalytic Hairpin Assembly

Niu

et al. 2022

Front. Mol. Biosci.

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Non-invasive early diagnosis is of great significant in disease pathologic development and subsequent medical treatments, and microRNA (miRNA) detection has attracted critical attention in early cancer screening and diagnosis. However, it was still a challenge to report an accurate and sensitive method for the detection of miRNA during cancer development, especially in the presence of its analogs that produce intense background noise. Herein, we developed a surface-enhanced Raman scattering (SERS)–based lateral flow assay (LFA) biosensor, assisted with catalytic hairpin assembly (CHA) amplification strategy, for the dynamic monitoring of miR-106b and miR-196b, associated with laryngeal squamous cell carcinoma (LSCC). In the presence of target miRNAs, two hairpin DNAs could self-assemble into double-stranded DNA, exposing the biotin molecules modified on the surface of palladium (Pd)–gold (Au) core–shell nanorods (Pd-AuNRs). Then, the biotin molecules could be captured by the streptavidin (SA), which was fixed on the test lines (T1 line and T2 line) beforehand. The core–shell spatial structures and aggregation Pd-AuNRs generated abundant active “hot spots” on the T line, significantly amplifying the SERS signals. Using this strategy, the limits of detections were low to aM level, and the selectivity, reproducibility, and uniformity of the proposed SERS-LFA biosensor were satisfactory. Finally, this rapid analysis strategy was successfully applied to quantitatively detect the target miRNAs in clinical serum obtained from healthy subjects and patients with LSCC at different stages. The results were consistent with the quantitative real-time PCR (qRT-PCR). Thus, the CHA-assisted SERS-LFA biosensor would become a promising alternative tool for miRNAs detection, which showed a tremendous clinical application prospect in diagnosing LSCC.

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“…The field enhancement is particularly strong at sharp corners or tips 6,7 and interparticle gaps. 8−12 Extensive efforts have been devoted to the structural optimization of SERS substrates, 3,13,14 but two important bottlenecks remain and limit their wide range of applications. First, most SERS technologies for aqueous sample detection are based on the binding of analytes to SERS-active regions, but the affinity is not strong enough for effectively capturing targets on the substrate in most cases.…”

Section: ■ Introductionmentioning

confidence: 99%

Calcium Alginate Gel Beads Containing Gold Nanobipyramids for Surface-Enhanced Raman Scattering Detection in Aqueous Samples

Chen

Yang

Lin

et al. 2021

ACS Appl. Nano Mater.

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The application of surface-enhanced Raman scattering (SERS) in aqueous sample detection is normally limited by the low affinity between analytes and SERS-active nanoparticles. Furthermore, a tendency of uncontrollable aggregation of solute (nanoparticles or analytes) can cause poor reproducibility of the detected SERS signal. Herein, a ready-to-use plasmonic gel bead was developed for rapid and effective detection of aqueous samples with high sensitivity and reproducibility. The SERS gel bead is made of calcium alginate gel beads (CAGBs) that contain gold nanobipyramids (Au NBPs) and an aqueous sample, which can be prepared and detected within only 1 min. Au NBPs/CAGBs can generate an in-depth three-dimensional SERS-active gel network for trapping analytes and offering a uniform hotspot region, which produces a reproducible and uniform signal. Using rhodamine 6G as a model target, the proposed method exhibits excellent reproducibility with a relative standard deviation of 6.57% and a detection limit of 0.4 nM. Then, Au NBPs/CAGBs were applied to quantitatively detect serum uric acid in the range of 10−1000 μM and a limit of detection of 0.18 μM, and the results were strongly consistent with those of the commercial ELISA method. This work offers a low-cost and easy route for the fabrication of a versatile SERS substrate for monitoring disease-related biomarkers and point-of-care testing.

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Self-assembly of plasmonic nanostructures into superlattices for surface-enhanced Raman scattering applications

Cited by 21 publications

References 98 publications

Self-assembly of colloidal nanoparticles into 2D arrays at water–oil interfaces: rational construction of stable SERS substrates with accessible enhancing surfaces and tailored plasmonic response

Self-assembly of colloidal nanoparticles into 2D arrays at water–oil interfaces: rational construction of stable SERS substrates with accessible enhancing surfaces and tailored plasmonic response

SERS Based Lateral Flow Assay for Rapid and Ultrasensitive Quantification of Dual Laryngeal Squamous Cell Carcinoma-Related miRNA Biomarkers in Human Serum Using Pd-Au Core-Shell Nanorods and Catalytic Hairpin Assembly

Calcium Alginate Gel Beads Containing Gold Nanobipyramids for Surface-Enhanced Raman Scattering Detection in Aqueous Samples

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