Dispersion and self-orientation of gold nanoparticles in sol–gel hybrid silica – optical transmission properties

Lundén, Hampus; Liotta, Adrien; Château, Denis; Lerouge, Frédéric; Chaput, Frédéric; Parola, Stéphane; Brännlund, Carl; Ghadyani, Z.; Kildemo, Morten; Lindgren, Mikael; Lopes, Cesar

doi:10.1039/c4tc02353f

Cited by 38 publications

(41 citation statements)

References 36 publications

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“…By controlling the shape of gold nanoparticles it is possible to choose where the plasmon resonance is located in the wavelength spectrum [54,56,57]. The change in plasmon resonance wavelength due to different sizes/shapes of bipyramidal gold nanoparticles is demonstrated in figure 1.12 [17]. Gold nanoparticles in close proximity to each other show a shift in plasmon resonance wavelength [2,3,58,59].…”

Section: Gold Nanoparticlesmentioning

confidence: 99%

“…Sol-gel glasses have proven to be versatile since they can be doped with gold nano-particles and/or high concentrations of Pt-ethynyl chromophores while retaining their ability to be polished for optical use [1,15,17]. A short overview of sol-gel glasses relevant to the matrix of the glasses used in this work is given in section 1.7.…”

Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

“…The filters investigated in this work are MTEOS sol-gel glasses doped with gold nanoparticles (section 1.8) and/or platinum acetylides (section 1.6) [15][16][17]. Due Introduction Figure 1.2.…”

Section: Self-activating Filtersmentioning

confidence: 99%

“…Transmission spectra of the glass samples were recorded with a CARY 5G UVVis-NIR spectrometer [15][16][17]. The measurements were performed by Lopes.…”

Section: Uv-vis Measurementsmentioning

confidence: 99%

“…The integrating sphere was calibrated by measuring the output pulse energy for varying input fluences without the sample inserted [17].…”

Section: Calibrationmentioning

confidence: 99%

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Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Lundén¹

2017

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High power laser pulses can be a threat to sensors, including the human eye. Traditionally this threat has been alleviated by colour filters that blocks radiation in chosen wavelength ranges. Colour filters' main drawback is that they block radiation regardless of it being useful or damaging, information is removed for wavelengths at which the filter protect. Protecting the entire wavelength range of a sensor would block or strongly attenuate the radiation needed for the operation of the sensor.Sol-gel glasses highly doped with Pt-Acetylide chromophores have previously shown high optical quality in combination with efficient optical power limiting through reverse saturable absorption 1 . These filters will transmit visible light unless the light fluence is above a certain threshold. A key design consideration of laser protection filters is linear absorption in relation to threshold level. By increasing chromophore concentration the threshold is lowered at the expense of higher linear absorption. This means that the user's view is degraded through the filter.Adding small amounts of gold nanoparticles to the glasses resulted in an increase in optical power limiting performance. The optimal concentration of gold nanoparticles corresponded to a mean particle distance of several micrometers. The work in this licentiate thesis is about the characterization and explanation of this effect.The glasses investigated in this work were MTEOS Sol-Gel glasses doped with either only gold nanoparticles of varying shape and concentration, 50 mM of PE2-CH 2 OH codoped with gold nanoparticles or 50 mM of PE3-CH 2 OH codoped with gold nanoparticles. The glasses only doped with gold nanoparticles showed high optical power limiting performance at 532 nm laser wavelength, but no optical power limiting at the fluences tested at 600 nm. The PE2-CH 2 OH glasses codoped with gold nanoparticles showed an enhancement of optical power limiting at 600 nm for the low gold nanoparticle concentration glasses. The enhancement was weak-1 Standard nomenclature, see section 1.3.3.iii iv ened or not present for higher concentrations. A similar enhancement above noise level for the PE3-CH 2 OH glasses was not found.A population model is used to give a qualitative explanation of the findings. The improvement in optical power limiting performance for the PE2-CH 2 OH glasses is explained by the gold nanoparticles helping to more quickly populate the highly absorbing triplet state during the rising edge of the laser pulse by enhancing two-photon absorption. The lack of any marked enhancement for the PE3-CH 2 OH glasses is explained by the PE3-CH 2 OH chromophore already being of sufficiently high performance to quickly populate the highly absorbing triplet state during the rising edge of the laser pulse. Further work is necessary to validate this model against other chromophores and improving its quantitative predictive power. Populärvetenskaplig sammanfattningLaserpulser med hög effekt kan vara ett hot mot sensorer, inklusive människoögat. Traditi...

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Section: Gold Nanoparticlesmentioning

confidence: 99%

Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

Section: Self-activating Filtersmentioning

confidence: 99%

“…Transmission spectra of the glass samples were recorded with a CARY 5G UVVis-NIR spectrometer [15][16][17]. The measurements were performed by Lopes.…”

Section: Uv-vis Measurementsmentioning

confidence: 99%

“…The integrating sphere was calibrated by measuring the output pulse energy for varying input fluences without the sample inserted [17].…”

Section: Calibrationmentioning

confidence: 99%

See 3 more Smart Citations

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Lundén¹

2017

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Optical Properties of Hybrid Organic–inorganic Materials and their Applications – Part II : Nonlinear Optics and Plasmonics

Parola

Julián‐López

Carlos

et al. 2017

Handbook of Solid State Chemistry

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Research on hybrid inorganic–organic materials has experienced an explosive growth since the 1980s, with the expansion of soft inorganic chemistry based processes. Indeed, mild synthetic conditions, low processing temperatures provided by “chimie douce” and the versatility of the colloidal state allow for the mixing of the organic and inorganic components at the nanometer scale in virtually any ratio to produce the so‐called hybrid materials. Today, a high degree of control over both composition and nanostructure of these hybrids can be achieved allowing tunable structure–property relationships. This, in turn, makes it possible to tailor and fine‐tune many properties (mechanical, optical, electronic, thermal, chemical…) in very broad ranges, and to design specific multifunctional systems for applications. In particular, the field of “hybrid‐optics” has been very productive not only scientifically but also in terms of applications. Indeed, numerous optical devices based on hybrids are already in, or very close, to the market. This review describes most of the recent advances performed in this field. Emphasis will be given to luminescent, photochromic, NLO , and plasmonic properties. As an Outlook, we show that the controlled coupling between plasmonics and luminescence is opening a land of opportunities in the field of “hybrids‐optics.”

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Long Distance Enhancement of Nonlinear Optical Properties Using Low Concentration of Plasmonic Nanostructures in Dye Doped Monolithic Sol–Gel Materials

Château

Liotta

Lundén

et al. 2016

Adv Funct Materials

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International audienceMonolithic sol–gel silica composites incorporating platinum-based chromophores and various types of gold nanoparticles (AuNPs) are prepared and polished to high optical quality. Their photophysical properties are investigated. The glass materials show well-defined localized surface plasmon resonance (SPR) absorbance from the visible to NIR. No redshifts of the AuNP plasmon absorption peaks due to the increase in nanoparticle doping concentration are observed in the glasses, proving that no or very small SPR coupling effects occur between the AuNPs. At 600 nm excitation, but not at 532 nm, the AuNPs improve the nonlinear absorption performance of glasses codoped with 50 × 10−3 m of a Pt-acetylide chromophore. The glasses doped with lower concentrations of AuNPs (2–5 μm average distance) and 50 × 10−3 m in chromophore, show a marked improvement in nonlinear absorption, with no or only small improvement for the more highly AuNP doped glasses. This study shows the importance of excitation wavelength and nanoparticle concentration for composite systems employing AuNPs to improve two-photon absorption of chromophores

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Dispersion and self-orientation of gold nanoparticles in sol–gel hybrid silica – optical transmission properties

Cited by 38 publications

References 36 publications

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Optical Properties of Hybrid Organic–inorganic Materials and their Applications – Part II : Nonlinear Optics and Plasmonics

Long Distance Enhancement of Nonlinear Optical Properties Using Low Concentration of Plasmonic Nanostructures in Dye Doped Monolithic Sol–Gel Materials

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