Tunable Visible Emission of Luminescent Hybrid Nanoparticles Incorporating Two Complementary Luminophores: ZnO Nanocrystals and [Mo6Br14]2− Nanosized Cluster Units

Aubert, Tangi; Nerambourg, Nicolas; Saito, Noriko; Haneda, Hajime; Ohashi, Naoki; Mortier, Michel; Cordier, Stéphane; Grasset, Fabien

doi:10.1002/ppsc.201200047

Cited by 25 publications

(24 citation statements)

References 58 publications

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“…Since the energies of these bands are similar for Mo 6 Cl 14 2− and Mo 6 Br 14 2− , it is believed that both highest occupied and lowest unoccupied molecular orbitals are largely metal centered [61]. Other researchers have revealed that Mo 6 NCs can be integrated with other material systems, such as semiconducting quantum dots [46], silica [47] and copolymer [48]. In an earlier effort, Grasset et al [46] presented the preparation and characterization of a novel organosol and solid state nanocomposite, namely (( n -C 4 H 9 ) 4 N) 2 Mo 6 Br 14 @ZnO, by using an original and simple bottom-up process.…”

Section: Synthesis Approaches For Pt Mo Bi and Alloy Ncsmentioning

confidence: 99%

“…These emissive properties have been used successfully to sensitize Er 3+ complex emission in the infrared region and within the polymer matrix. Aubert et al [47] successfully stabilized the ZnO nanocrystals in the presence of water using polyvinylpyrrolidone for their further coencapsulation along with [Mo 6 Br 14 ] 2 cluster units in silica to form ZnO–Cs 2 [Mo 6 Br 14 ]@SiO 2 nanoparticles using a modified Stöber process. These nanoparticles exhibit tunable emission properties with a broad emission spectrum covering almost the entire visible range for an excitation wavelength of 365 nm (figure 7).…”

Section: Synthesis Approaches For Pt Mo Bi and Alloy Ncsmentioning

confidence: 99%

Section: Synthesis Approaches For Pt Mo Bi and Alloy Ncsmentioning

confidence: 99%

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Luminescent metal nanoclusters: controlled synthesis and functional applications

Sun

Sakka

2014

Science and Technology of Advanced Materials

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Luminescent metal nanoclusters that consist of only several, to tens of, metal atoms and which possess sizes comparable to the Fermi wavelength of electrons have recently attracted significant attention. This new class of luminescent materials not only provides the missing link between atomic and nanoparticle behaviors in metals but also they present abundant novel information for the development of new applicable material systems to meet urgent needs in many areas (such as ultrasensitive sensors for heavy metals, bioimaging, as well as information technology) mainly because of their attractive characteristics, including ultra-small size, good dispersibility, excellent biocompatibility and photostability. In this review, we summarize recent advances in the controlled synthesis and application of luminescent metal nanoclusters, with a particular emphasis on Pt, Mo, Bi and alloy clusters. We also speculate on their future and discuss potential developments for their use in sensors, bioimaging and energy harvesting and conversion.

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Section: Synthesis Approaches For Pt Mo Bi and Alloy Ncsmentioning

confidence: 99%

Section: Synthesis Approaches For Pt Mo Bi and Alloy Ncsmentioning

confidence: 99%

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Luminescent metal nanoclusters: controlled synthesis and functional applications

Sun

Sakka

2014

Science and Technology of Advanced Materials

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“…More recently, ZnO-Cs 2 Mo 6 Br 14 colloidal solutions were stabilized by addition of polyvinylpyrrolidone (PVP) in the presence of water and could be therefore used for the preparation of transparent and luminescent polymer thin films. [19] These films were transparent in the visible range, and produced a large emission band covering almost the entire visible range under excitation at 325 nm. Nevertheless, because of the low emission efficiency of the bromide cluster, the fine tuning of their luminescence properties was not possible.…”

Section: Introductionmentioning

confidence: 99%

Visible tunable lighting system based on polymer composites embedding ZnO and metallic clusters: from colloids to thin films

Truong

Dierre

Grasset

et al. 2016

Science and Technology of Advanced Materials

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The development of phosphor devices free of heavy metal or rare earth elements is an important issue for environmental reasons and energy efficiency. Different mixtures of ZnO nanocrystals with Cs2Mo6I8(OOC2F5)6 cluster compound (CMIF) dispersed into polyvinylpyrrolidone matrix have been prepared by very simple and low cost solution chemistry. The resulting solutions have been used to fabricate highly transparent and luminescent films by dip coating free of heavy metal or rare earth elements. The luminescence properties of solution and dip-coated films were investigated. The luminescence of such a system is strongly dependent on the ratios between ZnO and CMIF amounts, the excitation wavelength and the nature of the system. By varying these two parameters (ratio and wavelength), a large variety of colors, from blue to red as well as white, can be achieved. In addition, differences in the luminescence properties have been observed between solutions and thin films as well as changes of CMIF emission band maximum wavelength. This may suggest some possible interactions between the different luminophore centers, such as energy transfer or ligands exchange on the Mo6 clusters.

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“…Due to its hexagonal-wurtzite crystal structure, Zn and O terminated polar surfaces, different growth rates of the diverse crystal planes, quasi-1-Dimensional (Q1D) nanostructures and complex morphologies from ZnO can be synthesized. The direct bandgap which lies in the near ultraviolet -(UV) spectral region and alternating Zn and O stacking layers enable ZnO nanostructures to exhibit exceptional optical, luminescent 6,7) and electrical properties 5,[8][9][10][11] . Bendability is also a very important property required for different applications but bulk ceramics or metal oxides are brittle in nature [1][2][3] .…”

Section: Introductionmentioning

confidence: 99%

Versatile Fabrication of Complex Shaped Metal Oxide Nano-Microstructures and Their Interconnected Networks for Multifunctional Applications

Mishra¹,

Kaps²,

Schuchardt³

et al. 2014

KONA

121

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Metal oxide nano-microstructures are applied in photocatalytic surfaces, sensors or biomedical engineering, proving the versatile utilization of nanotechnology. However, more complex or interconnected nano-microstructures are still seldomly met in practical applications, although they are of higher interest, due to enhanced structural, electronic and piezoelectric properties, as well as several complex biomedical effects, like antiviral characteristics. Here we attempt to present an overview of the novel, facile and cost-efficient flame transport synthesis (FTS) which allows controlled growth of different nano-microstructures and their interconnected networks in a scalable process. Various morphologies of nano-microstructures synthesized by FTS and its variants are demonstrated. These nano-microstructures have shown potential applications in different fields and the most relevant are reviewed here. Fabrication, growth mechanisms and properties of such large and highly porous three-dimensional (3D) interconnected networks of metal oxides (ZnO, SnO 2 , Fe 2 O 3 ) nano-microstructures including carbon based aerographite material using FTS approaches are discussed along with their potential applications.

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Tunable Visible Emission of Luminescent Hybrid Nanoparticles Incorporating Two Complementary Luminophores: ZnO Nanocrystals and [Mo₆Br₁₄]²⁻ Nanosized Cluster Units

Cited by 25 publications

References 58 publications

Luminescent metal nanoclusters: controlled synthesis and functional applications

Luminescent metal nanoclusters: controlled synthesis and functional applications

Visible tunable lighting system based on polymer composites embedding ZnO and metallic clusters: from colloids to thin films

Versatile Fabrication of Complex Shaped Metal Oxide Nano-Microstructures and Their Interconnected Networks for Multifunctional Applications

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