Surface enhanced fluorescence and Raman scattering by gold nanoparticle dimers and trimers

Zhang, Zhenglong; Yang, Pengfei; Xu, Hongxing; Zheng, H.

doi:10.1063/1.4776227

Cited by 69 publications

(40 citation statements)

References 29 publications

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“…It is found that the fabrication of effective PEF substrate with high local EM field or "hotspots" will produce better fluorescence enhancement. Furthermore, the simultaneous enhanced Raman and fluorescence spectrum from the gold dimer and trimer nanostructure was observed recently [82]. A) The AFM image of Ag fractal-like structure, B) the model of fractal-like structure highlighted with red line circle in a), C) the simulated EM field with 532 nm (top) and 633 nm (down), and D) the PE spectra of Rh6G molecules on reference sample(curve a), and Ag fractallike structure (curve b) [72].…”

Section: Figurementioning

confidence: 99%

Recent Progress on Plasmon-Enhanced Fluorescence

et al. 2015

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Abstract:The optically generated collective electron density waves on metal-dielectric boundaries known as surface plasmons have been of great scientific interest since their discovery. Being electromagnetic waves on gold or silver nanoparticle's surface, localised surface plasmons (LSP) can strongly enhance the electromagnetic field. These strong electromagnetic fields near the metal surfaces have been used in various applications like surface enhanced spectroscopy (SES), plasmonic lithography, plasmonic trapping of particles, and plasmonic catalysis. Resonant coupling of LSPs to fluorophore can strongly enhance the emission intensity, the angular distribution, and the polarisation of the emitted radiation and even the speed of radiative decay, which is so-called plasmon enhanced fluorescence (PEF). As a result, more and more reports on surface-enhanced fluorescence have appeared, such as SPASER-s, plasmon assisted lasing, single molecule fluorescence measurements, surface plasmoncoupled emission (SPCE) in biological sensing, optical orbit designs etc. In this review, we focus on recent advanced reports on plasmon-enhanced fluorescence (PEF). First, the mechanism of PEF and early results of enhanced fluorescence observed by metal nanostructure will be introduced. Then, the enhanced substrates, including periodical and nonperiodical nanostructure, will be discussed and the most important factor of the spacer between molecule and surface and wavelength dependence on PEF is demonstrated. Finally, the recent progress of tipenhanced fluorescence and PEF from the rare-earth doped up-conversion (UC) and down-conversion (DC) nanoparticles (NPs) are also commented upon. This review provides an introduction to fundamentals of PEF, illustrates the current progress in the design of metallic nanostructures for efficient fluorescence signal amplification that utilises propagating and localised surface plasmons.

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Section: Figurementioning

confidence: 99%

Recent Progress on Plasmon-Enhanced Fluorescence

et al. 2015

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“…SERS substrates involving nanogaps have been fabricated by either bottom-up or top-down processes. For example, dimers and trimers consisting of gold NPs synthesized by a wet chemical method are shown in Figure 3a [58]. The simulated distributions of the local electric field enhancement of single particle, dimer and trimer are shown in Figure 3b-d, respectively.…”

Section: Surface-enhanced Raman Spectroscopymentioning

confidence: 99%

“…(a) spheres [17], (b) cubes [18], (c) right bipyramids [19], (d) octahedrons [20], (e) flowers [21], (f) bars [22], (g) rices [23], (h) rods [24], (i) carrots [25], and (j) wires [26]. Images of the simulated distributions of |E| 2 in logarithmic scale with 632.8 nm excitation for single gold NP, dimer, and trimer [58]. (e) SEM image of a dimer consisting of two flowerlike silver particles [63].…”

Section: Figurementioning

confidence: 99%

Chemically synthesized noble metal nanostructures for plasmonics

Liang

Hong

Pan

et al. 2015

Nanotechnology Reviews

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Review: Some novel metal nanostructures synthesized by wet chemical methods and their fundamental plasmonic properties are discussed, and some applications of these nanostructures in plasmonics, including surface-enhanced Raman spectroscopy, plasmonic sensing, optical nanoantennas and plasmonic circuitry are highlighted. AbstractNoble metal nanostructures have drawn attention of researchers in many fields due to their particular optical properties. Controlling the metal nanostructures' size, shape, material, assembly and surrounding environment can tune their unique plasmonic features that are important for practical applications. In this review, we firstly discuss some novel metal nanostructures synthesized through wet chemical methods and their fundamental plasmonic properties. Then some applications of these chemically-synthesized nanostructures in plasmonics are highlighted, including surface-enhanced Raman spectroscopy, plasmonic sensing, optical nanoantennas and plasmonic circuitry. Plasmonic nanostructures provide the ways to manipulate light at the nanometer scale, and open the prospects of developing nanophotonic devices for sensing and information technologies.

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“…Thus, SERS is very sensitive to nanoparticle size, shape, and spatial arrangement. [2][3][4][5][6] In recent decades, great potential for application of SERS in chemical and biochemical analyses has been demonstrated. [7][8][9] There exist two main directions for development of new types of SERS substrates: one is the quest for the largest possible enhancement factor (EF) and hence for ultra-high sensitivity [10][11][12] and the other is the quest for reasonable EF of substrates with low cost fabrication for large-scale measurements.…”

Section: Introductionmentioning

confidence: 99%

Microstructured polymer‐based substrates with broadband absorption for surface‐enhanced Raman scattering

Yang

Jiwei

et al. 2013

J Raman Spectroscopy

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Large area (3 × 3 cm 2 ) substrates for surface-enhanced Raman scattering were fabricated by combining femtosecond laser microstructuring and soft lithography techniques. The fabrication procedure is as follows: (i) femtosecond laser machining is used to create a silicon master copy, (ii) replicates from polydimethylsiloxane are made, and (iii) a 50-nm-thick gold film is deposited on the surface of the replicates. The resulting substrates exhibit strongly enhanced absorption in the spectral region of 350 ∼ 1000 nm and generate enhanced Raman signal with enhancement factor of the order of 10 7 for 10 -6 M rhodamine 6G. The main advantages of our substrates are low cost, large active area, and possibility for mass replication.

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Surface enhanced fluorescence and Raman scattering by gold nanoparticle dimers and trimers

Cited by 69 publications

References 29 publications

Recent Progress on Plasmon-Enhanced Fluorescence

Recent Progress on Plasmon-Enhanced Fluorescence

Chemically synthesized noble metal nanostructures for plasmonics

Microstructured polymer‐based substrates with broadband absorption for surface‐enhanced Raman scattering

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