Next-generation thermo-plasmonic technologies and plasmonic nanoparticles in optoelectronics

Sio, Luciano De; Placido, Tiziana; Comparelli, Roberto; Curri, Maria Lucia; Striccoli, Marinella; Tabiryan, Nelson V.; Bunning, Timothy J.

doi:10.1016/j.pquantelec.2015.03.001

Cited by 70 publications

(47 citation statements)

References 214 publications

(220 reference statements)

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“…The frequency of this resonance depends on the nanoparticle size, shape, chemical composition and proximity to other nanoparticles. Therefore, control of such parameters allows us to tune the position of the plasmon absorbance band in the whole Vis-NIR (Near-Infrared) range [48][49][50][51][52]. In particular, in an anisotropic nanoparticle, such as a nanorod (NR), the oscillation of electrons could occur along the transverse and longitudinal axis, thus splitting the typical plasmon band in two signals.…”

Section: Mxsy/tio2-based Hybrid Nanocrystalsmentioning

confidence: 99%

“…The transverse plasmon band is typically centred at 520 nm for Au nanoparticles and at 420 nm for Ag nanoparticles, while the longitudinal plasmon band position depends on the ratio between the length and diameter (aspect ratio) of the nanoparticle. Therefore, a fine-tuning of the aspect ratio of metal NRs allows us to shift the position of the longitudinal plasmon band across the whole visible-NIR range ( Figure 5) [2,49,53]. Furthermore, the increase in the aspect ratio results in a non-linear increase of the full width at half maximum (FWHM) of longer wavelength absorption peak [54].…”

Section: Tio2/plasmonic Material-based Hybrid Nanocrystalsmentioning

confidence: 99%

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Visible-Light-Active TiO2-Based Hybrid Nanocatalysts for Environmental Applications

et al. 2017

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Photocatalytic nanomaterials such as TiO 2 are receiving a great deal of attention owing to their potential applications in environmental remediation. Nonetheless, the low efficiency of this class of materials in the visible range has, so far, hampered their large-scale application. The increasing demand for highly efficient, visible-light-active photocatalysts can be addressed by hybrid nanostructured materials in which two or more units, each characterised by peculiar physical properties, surface chemistry and morphology, are combined together into a single nano-object with unprecedented chemical-physical properties. The present review intends to focus on hybrid nanomaterials, based on TiO 2 nanoparticles able to perform visible-light-driven photocatalytic processes for environmental applications. We give a brief overview of the synthetic approaches recently proposed in the literature to synthesise hybrid nanocrystals and discuss the potential applications of such nanostructures in water remediation, abatement of atmospheric pollutants (including NO x and volatile organic compounds (VOCs)) and their use in self-cleaning surfaces.

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Section: Mxsy/tio2-based Hybrid Nanocrystalsmentioning

confidence: 99%

Section: Tio2/plasmonic Material-based Hybrid Nanocrystalsmentioning

confidence: 99%

Visible-Light-Active TiO2-Based Hybrid Nanocatalysts for Environmental Applications

et al. 2017

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“…[1][2][3][4][5] The control of AuNPs individual characteristics (i.e. size, shape, and size/shape distribution) is fundamental to exploit at a higher length scale their properties that are often related to collective effects.…”

Section: Introductionmentioning

confidence: 99%

“…[7] The proeminent member of this group of aqueous synthesis is probably the 'Turkevich' protocol introduced in 1951 for the synthesis of citrate-stabilized AuNPs. [8] This synthesis enables to obtain quite monodisperse AuNPs in a wide size range by simply changing the relative concentrations of trisodium citrate molecules that are quickly injected in a boiling HAuCl 4 aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Shape-Tailored Colloidal Molecules Obtained by Self-Assembly of Model Gold Nanoparticles with Flexible Polyelectrolyte

Shi

Carn

2015

Langmuir

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ABSTRACT.We study the effect of citrate to gold molar ratio (X) on the size of citrated gold nanoparticles (AuNPs). This dependence is still a matter of debate for X  3 where the polydispersity is yet minimized. Indeed, there is no consensus between experiments proposed so far for comparable experimental conditions. Nonetheless, the sole available theoretical prediction has never been validated experimentally in this range of X. We show unambiguously using 3 techniques (UV-Vis spectroscopy, dynamic light scattering and transmission electronic microscopy), 2 different synthetic approaches (Direct, Inverse) and 10 X values for each approach that AuNPs' size decay as a monoexponential with X. This result is, for the first time, in agreement with the sole available theoretical prediction by Kumar et al. on the whole studied range of X.2

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“…Noble metal nanostructures have been widely investigated in label-free biological sensor applications [1,2] due to localised surface plasmon resonance (LSPR), which is a coherent oscillation of the free electron gas in metal nanoparticles excited by electromagnetic radiation, particularly in the optical range. Trends in the development of plasmonic technologies include efforts to produce Au/Ag nanoparticles of controllable shape, size and porosity with the aim of improving LSPR tunability and of simplifying the technological procedure [3].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic behaviour of sputtered Au nanoisland arrays

Tvarožek¹,

Szabó²,

Νovotný³

et al. 2017

Applied Surface Science

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Available online xxx Keywords:Sequential sputtering Au nanoisland arrays Localised surface plasmon resonance Universal thickness scale rule of plasmon resonance a b s t r a c tThe specificity of the formation of Au sputtered nanoisland arrays (NIA) on a glass substrate or on a ZnO thin film doped by Ga is demonstrated. Statistical analysis of morphology images (SEM, AFM) exhibited the Log-normal distribution of the size (area) of nanoislands-their modus A M varied from 8 to 328 nm 2 depending on the sputtering power density, which determined the nominal thicknesses in the range of 2-8 nm. Preferential polycrystalline texture (111) of Au NIA increased with the power density and after annealing. Transverse localised surface plasmonic resonance (LSPR; evaluated by transmission UV-vis spectroscopy) showed the red shift of the extinction peaks ( l ≤ 100 nm) with an increase of the nominal thickness, and the blue shift ( ≤ −65 nm) after annealing of Au NIA. The plasmonic behaviour of Au NIA was described by modification of a size-scaling universal model using the nominal thin film thickness as a technological scaling parameter. Sputtering of a Ti intermediate adhesive ultrathin film between the glass substrate and gold improves the adhesion of Au nanoislands as well as supporting the formation of more defined Au NIA structures of smaller dimensions.

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Next-generation thermo-plasmonic technologies and plasmonic nanoparticles in optoelectronics

Cited by 70 publications

References 214 publications

Visible-Light-Active TiO2-Based Hybrid Nanocatalysts for Environmental Applications

Visible-Light-Active TiO2-Based Hybrid Nanocatalysts for Environmental Applications

Shape-Tailored Colloidal Molecules Obtained by Self-Assembly of Model Gold Nanoparticles with Flexible Polyelectrolyte

Plasmonic behaviour of sputtered Au nanoisland arrays

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