Preparation and photoluminescence enhancement of Au nanoparticles embedded La<scp>PO</scp><sub>4</sub>:Eu<sup>3+</sup> inverse opals

Chai, Zhuangzhuang; Yang, Zhengwen; Huang, Anjun; Yu, Chengye; Qiu, Jianbei; Song, Zhiguo

doi:10.1111/jace.15444

Cited by 12 publications

(6 citation statements)

References 23 publications

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“…In recent years, glasses embedded with minute quantities of particles of noble transition‐metal ions and metallic particles such as Ag and Au have been the subject of extensive investigation since such materials play crucial role in the preparation of silver/gold nanoparticle catalysts for several diversified oxidation reactions. Because of the interaction with incident electromagnetic wave the noble metal particles aggregate and endow the material with the additional novel characteristics like catalytic activity, strong photoluminescence in the visible and NIR regions …”

Section: Introductionmentioning

confidence: 99%

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

et al. 2018

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Na2O‐Sb2O3 glasses doped with different concentrations of Au2O3 were prepared by melt quenching technique and later were heat treated at 800°C for 6 hours. Structural analysis by XRD, XPS, SEM, EDS, and DSC techniques indicated that the samples are embedded with multiple crystallites composed of Sb3+, Sb5+, Au3+ ions, and Au0 metallic particles. These studies have further demonstrated a gradual increasing fraction of Au0 metallic particles with increasing Au2O3 concentration. IR spectral studies suggested increasing the degree of polymerization of the glass network (due to increasing concentration of Sb5+ ions that participate in the glass network with SbVO4 structural units) with rise in the concentration of Au2O3. Optical absorption spectra of the titled samples have exhibited a broad absorption band at about 530 nm predicted due to the surface plasmon resonance (SPR) and exhibited a spectral red shift with increasing intensity with increase in Au2O3 content. Photoluminescence (PL) spectra of the samples recorded (at λexc = corresponding SPR band position) exhibited an emission peak at about 580 nm (identified as being due to interband transition between sp and d bands of gold particles). Overall, the analysis of these results has confirmed increasing concentration of Au metallic particles with increase in Au2O3 content in the titled material. Finally, it is predicted that the presence of higher concentration of gold particles in the polymerized antimonate glass network makes the materials useful for designing different nano dimensional optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

et al. 2018

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“…On the other hand, the nonradiative losses decrease for the Au incorporated sample. This Eu 3+ emission improvement played by Au NPs can be attributed to the excitation field enhancement caused by the local surface plasmon resonance absorption effect of Au nanoparticles [58]. It is well-known in the literature that noble metal NPs can enhance the Eu 3+ luminescence and it can be explained by the radiating plasmons (RPs) model [59].In Fig.…”

Section: Resultsmentioning

confidence: 92%

Red phosphor based on Eu3+-doped Y2(MoO4)3 incorporated with Au NPs synthesized via Pechini's method

et al. 2018

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Structural, morphological and spectroscopic characterization of the Eu 3+-doped Y 2 (MoO 4) 3 red phosphor incorporated with Au nanoparticles (Au NPs) synthesized via Pechini's method is reported in the present study. In order to evaluate the Au NPs and Eu 3+ ions influence on the molybdate structure, the Y 2 (MoO 4) 3 , Y 2 (MoO 4) 3 :Eu 3+ , Y 2 (MoO 4) 3 /Au and Y 2 (MoO 4) 3 :Eu 3+ /Au samples were produced and fully investigated. All samples obtained at relatively low temperature, i.e., 650°C, show molybdate as the unique phase with high crystallinity assisted by both Eu 3+ ions and Au NPs. Water molecules detected in the molybdate structure probably are distorting MoO 4 , YO 6 and EuO 6 polyhedra similarly to the Au NPs incorporated in the same lattice. These Au NPs are spherical-shaped with a diameter near to 46 nm and they are located on the molybdate particle surface. The Eu 3+-doped phosphors, with or without the presence of Au NPs, exhibit intense red luminescence characteristic of the Eu 3+ ion inserted in low-symmetry sites. However, the Au NPs increase the radiative emission rate and absolute quantum yield of the Eu 3+ 5 D 0 emitter state due to the excitation field enhancement caused by the local surface plasmon resonance absorption effect of gold nanoparticles, which was confirmed by diffuse reflectance measurements. Finally, the Eu 3+ quantum efficiency enhancement to 92% played by the gold nanoparticles and the high red color purity qualify the obtained phosphor for photonic applications.

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“…Au‐NPs served as a co‐catalyst and a visible‐light sensitizer with a broad absorption peak in the 450‐800 nm region (Figure D). With localized surface plasmon resonance (LSPR) effect, the Au NPs‐loaded TiO 2 powder and Au NPs‐loaded TiO 2 DHS exhibit obvious wideband light absorption in the range of 400‐800 nm (Figure D). Furthermore, as the structure‐reinforced dielectric confinement effect as discussed above, the structure enhanced the electric field intensity, and inside the holes most of light multiple reflected by the walls, increasing the Au NPs contacts with light.…”

Section: Resultsmentioning

confidence: 99%

Artificial ceramic diatoms with multiscale photonic architectures via nanoimprint lithography for CO₂ photoreduction

Xie

Chen

et al. 2019

J Am Ceram Soc

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The elaborated photonic architectures and unique light manipulation ability of diatoms provide inspirations for the design of efficient artificial photosynthetic systems. However, the biomimetic synthesis of artificial diatoms with accurate control over nanoscale geometry for scalable production has been a great challenge. Herein, diatom Coscinodiscus sp. is served as a model for the biomimetic production of artificial ceramic diatoms with multiscale photonic architectures for CO 2 photoreduction. Optical finitedifference time-domain simulations are conducted to investigate the optical mechanisms on enhanced light harvesting and to establish a modified structural model. ElectronBeam Lithography and Nanoimprint Lithography are applied to fabricate artificial TiO 2 diatoms with elaborated periodic photonic structures and high surface areas (169.4 m 2 g −1 ). Artificial photosynthesis via CO 2 reduction enhances CO and CH 4 evolution on the artificial diatoms by up to 2.75-and 2.3-fold, respectively, compared with the corresponding powder sample. Furthermore, gas diffusion behaviors, closely related to the gas-phase reaction, are investigated by theoretical simulation to reveal the hierarchical structural effects on catalytic efficiency. This work provides a new pathway to design and biomimetic synthesis of artificial structures for enhanced performances.

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Preparation and photoluminescence enhancement of Au nanoparticles embedded LaPO₄:Eu³⁺ inverse opals

Cited by 12 publications

References 23 publications

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

Red phosphor based on Eu3+-doped Y2(MoO4)3 incorporated with Au NPs synthesized via Pechini's method

Artificial ceramic diatoms with multiscale photonic architectures via nanoimprint lithography for CO₂ photoreduction

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Preparation and photoluminescence enhancement of Au nanoparticles embedded LaPO4:Eu3+ inverse opals

Cited by 12 publications

References 23 publications

Structural and physical characteristics of Au2O3‐doped sodium antimonate glasses – Part I

Structural and physical characteristics of Au2O3‐doped sodium antimonate glasses – Part I

Red phosphor based on Eu3+-doped Y2(MoO4)3 incorporated with Au NPs synthesized via Pechini's method

Artificial ceramic diatoms with multiscale photonic architectures via nanoimprint lithography for CO2 photoreduction

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Preparation and photoluminescence enhancement of Au nanoparticles embedded LaPO₄:Eu³⁺ inverse opals

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

Structural and physical characteristics of Au₂O₃‐doped sodium antimonate glasses – Part I

Artificial ceramic diatoms with multiscale photonic architectures via nanoimprint lithography for CO₂ photoreduction