Preparation and Luminescence Properties of Y2O3: Eu3+ Nanorods via Post Annealing Process

Zhenxiu, Xu; Zhang, Hong; Zhao, Qichao; Peng, Lixia; Zhang, Pengyue

doi:10.1016/s1002-0721(07)60336-6

Cited by 27 publications

(4 citation statements)

References 16 publications

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“…Erbium-doped yttrium oxide nanoparticles have interesting luminescent properties such as intense cathodoluminescence and photoluminescence. , Nanomaterials of yttrium oxide doped with rare earth elements have been prepared by flame spray pyrolysis (Eu:Y 2 O 3 ), thermal decomposition of a polymeric resin, atomic layer deposition, gas-phase condensation, flux, combustion, − solvothermal and hydrothermal methods, − alkalide reduction, solution-based sol–gel processes, emulsion techniques, − precipitation, − and electrochemical methods. Preparation of Y 2 O 3 :Eu 3+ nanowires using a template of anodized aluminum oxide that was heated to 800 °C was reported by Zhang et al Ordered arrays of Y 2 O 3 :Eu 3+ nanotubes were prepared in anodic alumina membranes by a method of electronic field-assisted deposition …”

Section: Introductionmentioning

confidence: 99%

Surface-Directed Synthesis of Erbium-Doped Yttrium Oxide Nanoparticles within Organosilane Zeptoliter Containers

Englade-Franklin

Morrison

Verberne-Sutton

et al. 2014

ACS Appl. Mater. Interfaces

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We introduce an approach to synthesize rare earth oxide nanoparticles using high temperature without aggregation of the nanoparticles. The dispersity of the nanoparticles is controlled at the nanoscale by using small organosilane molds as reaction containers. Zeptoliter reaction vessels prepared from organosilane self-assembled monolayers (SAMs) were used for the surface-directed synthesis of rare earth oxide (REO) nanoparticles. Nanopores of octadecyltrichlorosilane were prepared on Si(111) using particle lithography with immersion steps. The nanopores were filled with a precursor solution of erbium and yttrium salts to confine the crystallization step to occur within individual zeptoliter-sized organosilane reaction vessels. Areas between the nanopores were separated by a matrix film of octadecyltrichlorosilane. With heating, the organosilane template was removed by calcination to generate a surface array of erbium-doped yttria nanoparticles. Nanoparticles synthesized by the surface-directed approach retain the periodic arrangement of the nanopores formed from mesoparticle masks. While bulk rare earth oxides can be readily prepared by solid state methods at high temperature (>900 °C), approaches for preparing REO nanoparticles are limited. Conventional wet chemistry methods are limited to low temperatures according to the boiling points of the solvents used for synthesis. To achieve crystallinity of REO nanoparticles requires steps for high-temperature processing of samples, which can cause self-aggregation and dispersity in sample diameters. The facile steps for particle lithography address the problems of aggregation and the requirement for high-temperature synthesis.

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Section: Introductionmentioning

confidence: 99%

Surface-Directed Synthesis of Erbium-Doped Yttrium Oxide Nanoparticles within Organosilane Zeptoliter Containers

Englade-Franklin

Morrison

Verberne-Sutton

et al. 2014

ACS Appl. Mater. Interfaces

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“…Yttrium oxide through synthesis has enabled the creation of structures such as nanoparticles, nanotubes, nanorods, nanospheres, nanoflowers, etc . [25,37,38]. To the best of our knowledge superhydrophobicity for yttrium oxide based coatings has not been reported so far.…”

Section: Introductionmentioning

confidence: 99%

Wettability of Y2O3: A Relative Analysis of Thermally Oxidized, Reactively Sputtered and Template Assisted Nanostructured Coatings

et al. 2012

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The wettability of reactively sputtered Y2O3, thermally oxidized Y-Y2O3 and Cd-CdO template assisted Y2O3 coatings has been studied. The wettability of as-deposited Y2O3 coatings was determined by contact angle measurements. The water contact angles for reactively sputtered, thermally oxidized and template assisted Y2O3 nanostructured coatings were 99°, 117° and 155°, respectively. The average surface roughness values of reactively sputtered, thermally oxidized and template assisted Y2O3 coatings were determined by using atomic force microscopy and the corresponding values were 3, 11 and 180 nm, respectively. The low contact angle of the sputter deposited Y2O3 and thermally oxidized Y-Y2O3 coatings is attributed to a densely packed nano-grain like microstructure without any void space, leading to low surface roughness. A water droplet on such surfaces is mostly in contact with a solid surface relative to a void space, leading to a hydrophobic surface (low contact angle). Surface roughness is a crucial factor for the fabrication of a superhydrophobic surface. For Y2O3 coatings, the surface roughness was improved by depositing a thin film of Y2O3 on the Cd-CdO template (average roughness = 178 nm), which resulted in a contact angle greater than 150°. The work of adhesion of water was very high for the reactively sputtered Y2O3 (54 mJ/m2) and thermally oxidized Y-Y2O3 coatings (43 mJ/m2) compared to the Cd-CdO template assisted Y2O3 coating (7 mJ/m2).

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“…In this aspect, various red emitting phosphors are reported. Among them, Na2Y2B2O7:Eu 3+ [11], BaZrGe3O9:Eu 3+ [12], Eu 3+ activated La2MoO6-La2WO6 composite [13], La2Ce2O7:Eu 3+ [14], CaMoO4:Eu 3+ [15], CaWO4:Eu 3+ [16], and YVO4:Eu 3+ [17,18], Y2O3:Eu 3+ [19][20][21][22][23], etc. may be mentioned.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Rod Shaped Red Emitting Gd2O3:Eu3+ Phosphor

Wangkhem

Singh

2023

J Fluoresc

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Simple hydrothermal method can be applied for synthesizing rod shape Gd2O3:Eu 3+ phosphors. Xray diffraction, Fourier transform infrared spectroscopy and transmission electron microscopy are used for the characterizations of samples. Increase of Eu 3+ concentration in Gd2O3:Eu 3+ can cause red shift in the charge transfer band (CTB) of Eu -O. The nature of Eu 3+ surroundings is asymmetric. It is ascertained from PL emission studies. The calculation of second order crystal field parameter from PL spectra corroborates the asymmetric environment of Eu 3+ . PL emission and decay lifetime studies confirm the existence of quenching due cross-relaxation. The quantum yield for Y2O3:Eu 3+ (19 at.%) under 265 nm excitation is found to be 7%.

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Preparation and Luminescence Properties of Y2O3: Eu3+ Nanorods via Post Annealing Process

Cited by 27 publications

References 16 publications

Surface-Directed Synthesis of Erbium-Doped Yttrium Oxide Nanoparticles within Organosilane Zeptoliter Containers

Surface-Directed Synthesis of Erbium-Doped Yttrium Oxide Nanoparticles within Organosilane Zeptoliter Containers

Wettability of Y2O3: A Relative Analysis of Thermally Oxidized, Reactively Sputtered and Template Assisted Nanostructured Coatings

Hydrothermal Synthesis of Rod Shaped Red Emitting Gd2O3:Eu3+ Phosphor

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