Single Particle Deformation and Analysis of Silica-Coated Gold Nanorods before and after Femtosecond Laser Pulse Excitation

Albrecht, Wiebke; Deng, Tian‐Song; Goris, Bart; Huis, Marijn A. van; Bals, Sara; Blaaderen, Alfons van

doi:10.1021/acs.nanolett.5b04851

Cited by 59 publications

(70 citation statements)

References 67 publications

(141 reference statements)

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“…The consistency of the EELS peak position of a single Au@Ni 3 S 2 and the optical absorption peak of Au@Ni 3 S 2 YSs points out that the resonance frequency of Au@Ni 3 S 2 YSs is not altered by the aggregation state and the Au yolks in YSs are free from LSPR coupling even if the NPs are in close proximity. As shown in Figure B, the highest electron field density was observed at the interface between Au and Ni 3 S 2 , suggesting that the highest intensity of LSPR occurs at the Au yolk, consistent with previously reported Au@TiO 2 ,[9b] Au@SiO 2 , and Au@Cu 2 O structures. Besides, all three spots show EELS peaks at ca.…”

supporting

confidence: 91%

“…The observed increase in peak width is caused by interface damping of Au@Ni 3 S 2 YSs and is indicative of an increase in the relaxation time of photogenerated e − /h + pairs . The blueshift corresponds to the higher dielectric constant of the Ni 3 S 2 shell compared to vacuum . The large skin depth of light is a fundamental parameter to enable the LSPR modes decay on Au yolk.…”

mentioning

confidence: 94%

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Tracing the Origin of Visible Light Enhanced Oxygen Evolution Reaction

Cai

Han

Caiyang

et al. 2018

Adv Materials Inter

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the interaction between light and matter, has attracted intensive research interest, due to its potential applications in water electrolysis, [1a] biosensors, [2] photochemical catalysis, [3] and optical heating. [4] LSPR modes are the collective oscillations of conduction band electrons at the interface between materials with negative and positive permittivity, [5] such as Au, [6] Ag, [5c] and Cu, [7] upon illumination with light of specific wavelengths. The electromagnetic field at the surface of the metals is amplified by the electron oscillations. [8] Such near field enhancement affords higher energy electrons, and therefore significantly promote the catalytic performance of the plasmonic metals. [9] The LSPR effect is highly dependent upon the physiochemical properties of the catalysts, such as morphology of the plasmonic metals and the localized electronic landscape. [7,10] Effective utilization of the LSPR effect for high-performance catalysis is require fine tuning of dielectric relaxation routes between the excited plasmonic metals and the surrounding substances. [11] For instance, when the plasmonic metals are nanosized (<30 nm), the LSPR decay would favor chemical transformation, as a result of nonthermalized charge-carriers distributing according to the Landau damping model. [12] So far, enormous efforts have been devoted to controlling the plasmon decay by designing distinctive plasmonic metal-containing nanostructures. [11a,13] Au nanoparticles (NPs) have been frequently studied as typical plasmonic metal catalysts. [5b,14] The deposition of Au NPs onto Ni(OH) 2 nanosheets promoted electrochemical water oxidation under illumination, compared to bare Ni(OH) 2 and bare Au NPs. [1a] Additionally, yolkshell nanostructures (YSs) and core-shell nanostructures (CSs) possess the advantage of collection of radiative, energetic carriers at the shells from the high concentration of electron-hole pairs at the cores, and thus facilitate the charge transfer of the nanomaterials to the adsorbates. [8a,9a,b,e,15] Energy losses within the CSs can be minimized by weakening the scattering, and thus, the confinement of the illumination energy by LSPR can be maximized. The controllable dielectric relaxation of LSPR decay of YSs has been observed in Ag@Pt CSs nanostructures under wavelength-specific illumination. [15b] However, the energy transfer mechanism between the core/yolk and the shell in YSs is still unclear.In this work, hybrid YSs with Au yolk (ca. 8 nm) and Ni 3 S 2 shell (ca. 8 nm in thickness) were fabricated to promote the visible-light-assisted OER. The efficient harvesting of solar energy Hybrid nanostructures with a plasmonic core and catalytic shell often show significantly enhanced catalytic efficiency under illumination of specific frequency. Excitation of localized surface plasmonic resonance on plasmonic metals under illumination can generate hot electrons that assist in the catalytic reaction. However, the correlation between the microstructural geometry, dielectric environment, internal e...

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supporting

confidence: 91%

mentioning

confidence: 94%

Tracing the Origin of Visible Light Enhanced Oxygen Evolution Reaction

Cai

Han

Caiyang

et al. 2018

Adv Materials Inter

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“…Several groups demonstrated the shape transformation of gold nanorods into spheres with fs‐laser melting . From the microscopical point of view, this process starts at the interior of a rod by creating point and line defects, which eventually leads to the formation of planar stacking defects and twinning.…”

Section: Non‐reversible Reconfigurationsmentioning

confidence: 99%

Light‐Induced Tuning and Reconfiguration of Nanophotonic Structures

Makarov

Zalogina

Tajik

et al. 2017

Laser & Photonics Reviews

178

115

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Interaction of light pulses of various durations and intensities with nanoscale photonic structures plays an important role in many applications of nanophotonics for high-density data storage, ultra-fast data processing, surface coloring and sensing. A design of optically tunable and reconfigurable structures made from different materials is based on many important physical effects and advances in material science, and it employs the resonant character of light interaction with nanostructures and strong field confinement at the nanoscale. Here we review the recent progress in physics of tunable and reconfigurable nanophotonic structures of different types. We start from low laser intensities that produce weak reversible changes in nanostructures, and then move to the discussion of non-reversible changes in photonic structures. We focus on three platforms based on metallic, dielectric and hybrid resonant photonic structures such as nanoantennas, nanoparticle oligomers and nanostructured metasurfaces. Main challenges and key advantages of each of the approaches focusing on applications in advanced photonic technologies are also discussed.

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“…[17,18] Besides its key importance for biomedical usage, high colloidal stability is also advantageous for applications in nanophotonics and catalysis, as aggregation and eventual fusion of metal nanoparticles is known to induce drastic changes in the plasmonic properties and a significant loss of activity, in particular after high temperature treatments. [19][20][21][22][23] Moreover, the improved mechanical stability imposed by the coating shells can be used to prevent morphological changes during the controlled alloying of bimetallic particles, [24,25] and has been employed to fixate the shape of 3D nanoparticle clusters. [26][27][28] Besides effectively inhibiting the oxidative etching of less noble metals such as silver or copper, as well as the leakage of toxic ions from quantum dots (QDs), encapsulation in dense silica shells offers excellent means to incorporate and protect fluorescent or Raman-active dye tags.…”

Section: Colloidal Chemical and Thermal Stabilizationmentioning

confidence: 99%

Silica‐Coated Plasmonic Metal Nanoparticles in Action

2018

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Hybrid colloids consisting of noble metal cores and metal oxide shells have been under intense investigation for over two decades and have driven progress in diverse research lines including sensing, medicine, catalysis, and photovoltaics. Consequently, plasmonic core-shell particles have come to play a vital role in a plethora of applications. Here, an overview is provided of recent developments in the design and utilization of the most successful class of such hybrid materials, silica-coated plasmonic metal nanoparticles. Besides summarizing common simple approaches to silica shell growth, special emphasis is put on advanced synthesis routes that either overcome typical limitations of classical methods, such as stability issues and undefined silica porosity, or grant access to particularly sophisticated nanostructures. Hereby, a description is given, how different types of silica can be used to provide noble metal particles with specific functionalities. Finally, applications of such nanocomposites in ultrasensitive analyte detection, theranostics, catalysts, and thin-film solar cells are reviewed.

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Single Particle Deformation and Analysis of Silica-Coated Gold Nanorods before and after Femtosecond Laser Pulse Excitation

Cited by 59 publications

References 67 publications

Tracing the Origin of Visible Light Enhanced Oxygen Evolution Reaction

Tracing the Origin of Visible Light Enhanced Oxygen Evolution Reaction

Light‐Induced Tuning and Reconfiguration of Nanophotonic Structures

Silica‐Coated Plasmonic Metal Nanoparticles in Action

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