Colloidal Synthesis of Plasmonic Metallic Nanoparticles

Zhang, Qingbo; Tan, Yen Nee; Xie, Jianping; Lee, Jim Yang

doi:10.1007/s11468-008-9067-x

Cited by 84 publications

(61 citation statements)

References 59 publications

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“…In the last years there has been a considerable amount of promising advances in this area, especially due to the development of novel colloidal synthesis methods [22,56] and softlithographic techniques [23] such as nano-imprint or colloidal lithography [57,58].…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Self-organized colloidal quantum dots and metal nanoparticles for plasmon-enhanced intermediate-band solar cells

et al. 2013

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A colloidal deposition technique is presented to construct long-range ordered hybrid arrays of self-assembled quantum dots and metal nanoparticles. Quantum dots are promising for novel opto-electronic devices but, in most cases, their optical transitions of interest lack sufficient light absorption to provide a significant impact in their implementation. A potential solution is to couple the dots with localized plasmons in metal nanoparticles. The extreme confinement of light in the near-field produced by the nanoparticles can potentially boost the absorption in the quantum dots by up to two orders of magnitude.In this work, light extinction measurements are employed to probe the plasmon resonance of spherical gold nanoparticles in lead sulfide colloidal quantum dots and amorphous silicon thin-films. Mie theory computations are used to analyze the experimental results and determine the absorption enhancement that can be generated by the highly intense near-field produced in the vicinity of the gold nanoparticles at their surface plasmon resonance.The results presented here are of interest for the development of plasmon-enhanced colloidal nanostructured photovoltaic materials, such as colloidal quantum dot intermediate-band solar cells.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Self-organized colloidal quantum dots and metal nanoparticles for plasmon-enhanced intermediate-band solar cells

et al. 2013

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“…Over the last decade, many efficient synthetic approaches have been developed that allow good control of AgNPs size, shape, and structure [1,6,7]. On the one hand, modeling plasmonic properties of AgNPs can provide useful indications for the synthesis [6,8,9].…”

Section: Introductionmentioning

confidence: 99%

A Study of the Surface Plasmon Resonance of Silver Nanoparticles by the Discrete Dipole Approximation Method: Effect of Shape, Size, Structure, and Assembly

2010

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The surface plasmon resonance (SPR) of silver nanoparticles (AgNPs) was studied with the discrete dipole approximation considering different shapes, sizes, dielectric environments, and supraparticles assemblies. In particular, we focused our simulations on AgNPs with sizes below 10 nm, where the correction of silver dielectric constant for intrinsic size effects is necessary. We found that AgNPs shape and assembly can induce distinctive features in the extinction spectra and that SPR is more intense when AgNPs have discoid or flat shapes and are embedded in a dielectric shell with high refractive index. However, the SPR loses much of its distinctive features when size effects and stabilizing molecules induce significant broadening of the extinction bands that is often observed in the case of thiolated AgNPs smaller than about 5 nm. These results are useful indications for in situ characterization and monitoring of AgNPs synthesis and for the engineering of AgNPs with new plasmonic properties.

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“…15 Surface Plasmon absorption bands of Ag and Au are in the visible and near-infrared (NIR) spectral regions, which is more useful for technological applications. 16 Noble metal nanoparticles, such as Au and Ag, can effectively enhance the absorption capability, by the surface plasmon resonance and they can also capture the photo-generated electrons, leading to the reduction of the recombination rate. 15 As the energy transfer between the excitons in the nanocrystal and plasmons in the metal surface occurs, the optical properties such as enhancement and quenching of photoluminescence (PL) of nanocrystals near the metal surface are modified.…”

Section: Introductionmentioning

confidence: 99%

Surface plasmon resonance in nanostructured Ag incorporated ZnS films

2015

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Silver incorporated zinc sulfide thin films are prepared by RF magnetron sputtering technique and the influence of silver incorporation on the structural, optical and luminescence properties is analyzed using techniques like grazing incidence X-Ray diffraction (GIXRD), atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), micro-Raman spectroscopy, UV-Vis spectroscopy and laser photoluminescence spectroscopy. XRD analysis presents hexagonal wurtzite structure for the films. A reduction of crystallinity of the films is observed due to Ag incorporation. The Raman spectral analysis confirms the reduction of crystallinity and increase of strain due to the Ag incorporation. AFM analysis reveals a rough surface morphology for the undoped film and Ag incorporation makes the films uniform, dense and smooth. A blue shift of band gap energy with increase in Ag incorporation is observed due to quantum confinement effect. An absorption band (450-650 nm region) due to surface plasmon resonance of the Ag clusters present in the ZnS matrix is observed for the samples with higher Ag incorporation. The complex dielectric constant, loss factor and distribution of volume and surface energy loss of the ZnS thin films are calculated. Laser photoluminescence measurements gives an intense bluish green emission from the ZnS films and a quenching of the PL emission is observed which can be due to the metal plasmonic absorption and non-radiative energy transfer due to Ag incorporation. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx

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Colloidal Synthesis of Plasmonic Metallic Nanoparticles

Cited by 84 publications

References 59 publications

Self-organized colloidal quantum dots and metal nanoparticles for plasmon-enhanced intermediate-band solar cells

Self-organized colloidal quantum dots and metal nanoparticles for plasmon-enhanced intermediate-band solar cells

A Study of the Surface Plasmon Resonance of Silver Nanoparticles by the Discrete Dipole Approximation Method: Effect of Shape, Size, Structure, and Assembly

Surface plasmon resonance in nanostructured Ag incorporated ZnS films

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