Solution-based metal enhanced fluorescence with gold and gold/silver core–shell nanorods

Ren, Zebin; Li, Xiaohua; Guo, Jingxia; Wang, Ruibo; Wu, Yanni; Zhang, Mingdi; Li, Caixia; Han, Qingyan; Dong, Jun; Zheng, Hairong

doi:10.1016/j.optcom.2015.08.071

Cited by 24 publications

(9 citation statements)

References 29 publications

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“…91 Other reported solution biosensing techniques involve core-shell nanoparticles. These structures have attracted much attention in MEF over the past decade, 26,[92][93][94] as coating with a dielectric material provides a natural spacer for the optimal positioning of a fluorophore. Their biosensing potential has already been demonstrated in the literature.…”

Section: Solution-based Mef Biosensingmentioning

confidence: 99%

Metal enhanced fluorescence biosensing: from ultra-violet towards second near-infrared window

2018

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Section: Solution-based Mef Biosensingmentioning

confidence: 99%

Metal enhanced fluorescence biosensing: from ultra-violet towards second near-infrared window

2018

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“…After 72 h, side by side GNR vertical arrays were obtained. According to previous reports, we utilized the “seed-mediated growth” to synthesize GNRs [23, 24].…”

Section: Resultsmentioning

confidence: 99%

“…The GNRs were performed via a modified seed-mediated growth method [23, 24]. The obtained GNR solution was centrifuged three times at 10,000 rpm for 5 min to remove excess CTAB.…”

Section: Methods and Experimentsmentioning

confidence: 99%

Nanoscale Vertical Arrays of Gold Nanorods by Self-Assembly: Physical Mechanism and Application

et al. 2019

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The unique photonic effect of self-assembled metal nanoparticles is widely used in many applications. In this article, we prepared self-assembled gold nanorod (GNR) vertical arrays substrate by an evaporation method and found that the morphology of the substrate can be effectively regulated by changing the immersion time in the target molecules solution to obtain different Raman enhancement effects. We separately calculated the local electromagnetic field of the GNR vertical arrays and disorder substrate by the finite element method (FEM), which was consistent with the experimental results. Based on optimal soaking time, the sensitivity, reproducibility, and stability of substrates were separately studied. The experimental results show that the GNR vertical arrays can detect Rhodamine 6G (Rh6G) at concentrations as low as 10 −11 M and exhibit good reproducibility and stability due to local electromagnetic (EM) field enhancement caused by the coupling of adjacent nanorods. Thus, our work can demonstrate that the substrate has excellent surface-enhanced Raman scattering (SERS) activity and the obtained GNR vertical arrays have great potential for biosensor and biodetection.

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“…However, it should be noted that FL quenching effect may also occur, related to the reduction of the evanescent electric field around the surface of ZnO structure at non-optimal molecular distance, resulting in insignificant quantum yield (Gontero et al, 2017). Therefore, optimized TEOS coverage of bare ZnO-QDs was examined for maximal fluorescence enhancement effect (Ren et al, 2015). The latter could be achieved through sufficient overlap between the excitation spectra of the quantum material and the NAGase assay fluorophore (E x of 365 nm).…”

Section: Resultsmentioning

confidence: 99%

Enhanced Fluorescence of N-Acetyl-β-D-Glucosaminidase Activity by ZnO Quantum Dots for Early Stage Mastitis Evaluation

Nirala

Shtenberg

2019

Front. Chem.

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Recurrent mastitis events are the major cause of annual revenue losses in the dairy sector resulting in decreased milk yield, escalading treatment costs and increased health risk of the entire herd. Upon udder inflammation, several biomarkers are proportionally secreted to its severity onto the blood circulation and consequently into milk (upon breached blood-milk barrier). N-acetyl-β-D-glucosaminidase activity is widely used mastitis indicator in milk, offering simple means of differentiation between healthy quarters from those with subclinical or clinical severity. Herein, we demonstrate fluorescence signal amplification concept for sensitive clinical status discrimination. Tetraethyl orthosilicate coated zinc oxide quantum dots were employed within the conventional N-acetyl-β-D-glucosaminidase activity assay. Under the experimental conditions, a profound non-radiative energy transfer occurred between quantum nanomaterials onto enzymatic fluorescent products resulting in intensified emission of the latter, over 11-folds, in comparison to nanoparticle-free assay. Overall, the fluorescence intensities were proportionally related to zinc oxide quantum dots surface coverage and concentration, SCC values and influenced by the causing bacteria (i.e., Streptococcus dysgalactiae and Coagulase-negative Staphylococci). Finally, the presented proof-of-concept offers an efficient, simple, cost-effective fluorescence signal amplification for early stage mastitis identification, offering means to diagnose the severity of the associated diseases and hence deducing on animals' clinical status.

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Solution-based metal enhanced fluorescence with gold and gold/silver core–shell nanorods

Cited by 24 publications

References 29 publications

Metal enhanced fluorescence biosensing: from ultra-violet towards second near-infrared window

Metal enhanced fluorescence biosensing: from ultra-violet towards second near-infrared window

Nanoscale Vertical Arrays of Gold Nanorods by Self-Assembly: Physical Mechanism and Application

Enhanced Fluorescence of N-Acetyl-β-D-Glucosaminidase Activity by ZnO Quantum Dots for Early Stage Mastitis Evaluation

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