Structural, optical and magnetic properties of gadolinium sesquioxide nanobars synthesized via thermal decomposition of gadolinium oxalate

Manigandan, R.; Giribabu, K.; Suresh, R.; Vijayalakshmi, L.; Narayanan, Vijaykrishnan

doi:10.1016/j.materresbull.2013.06.067

Cited by 21 publications

(12 citation statements)

References 31 publications

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“…This plot yielded a direct band gap of 5.32 eV and an indirect band gap of 5.08 eV, which is in good agreement with other published reports on fluorescent Gd 2 O 3 [16,77,78] . Early studies suggested the relation of band gap with a degree of structural changes within the lattice is a phenomenon that leads to a change in the energy level distribution within the optical band gap of nanomaterial [79] …”

Section: Applications Of Gd2o3 Nanoclusterssupporting

confidence: 90%

White Light Emitting Gadolinium Oxide Nanoclusters for In‐vitro Bio‐imaging

et al. 2022

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Fluorescent probes are highly desirable for accurate diagnosis and play a crucial role in the optical imaging modality. Here, ultrafine (1.2 nm) nanoclusters of undoped gadolinium oxide were synthesized via a simple, one‐pot technique using water as the reaction medium. Prepared nanoclusters exhibit strong tuneable emission spanning from 400‐620 nm (extended visible region) with broad full width at half maximum of (FWHM) ∼140 nm, resulting in white light emission (WLE). Cytotoxicity studies revealed nearly 100 % cell viability encouraging its application in cell imaging. These nanoclusters possessed distinctive properties such as wide‐range pH stability, ionic tolerability, durable photostability, and anomalous colloidal stability (more than 24 months). This brief report uses white light‐emitting gadolinium oxide (Gd2O3) nanoclusters as an optical probe for in‐vitro fluorescence imaging.

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Section: Applications Of Gd2o3 Nanoclusterssupporting

confidence: 90%

White Light Emitting Gadolinium Oxide Nanoclusters for In‐vitro Bio‐imaging

et al. 2022

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“…Oxide host phosphors were commonly synthesized by numerous methods namely sol-gel, hydrothermal, co-precipitation, combustion, solid-state method [5][6][7][8], etc. Among them solution combustion (SC) method was highly capable of producing nano synthesized products with large surface area, nano size, high purity, large production, etc.…”

Section: Introductionmentioning

confidence: 99%

Nd2O3:Gd3+ nanocrystalline phosphor: γ-Induced thermoluminescence, EPR and structural properties

Umesh

Nagabhushana

Sharma³

et al. 2014

Journal of Alloys and Compounds

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a b s t r a c tPreparation of nanocrystalline Nd 2 O 3 :Gd 3+ (2 mol%) phosphor was prepared by propellant combustion route at low temperature. Powder X-ray diffraction (PXRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques were used to study the structural and morphological features. A and C type hexagonal phase of Nd 2 O 3 was obtained in as-formed and calcined product at 900°C for 3 h. SEM images show the product was highly porous, agglomerated and irregular shaped particles. The average crystallite size estimated from Scherrer's and W-H plots were found to be in the range $20-50 nm. Combination of F g and (F g + E g ) modes were observed from Raman studies. A single TL glow peak at 409 K was recorded at a warming rate 5°C s À1. TL response as a function of c-irradiation showed linear response up to 1.6 kGy and later it followed exponential growth. The phosphor show simple glow curve structure with less fading over a period of 30 days. Trap parameters were estimated from Chen's peak shape method. The activation energy (E) and frequency factor (s) was found to in the range 1.377-2.934 eV and 2.01 Â 10 11 -8.70 Â 10 22 Hz respectively.

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“…The TGA curve has the usual shape already reported for lanthanide oxalates. 22,26 The total weight loss of 44.5 wt.% is significantly lower than the value of ∼53% observed in similar compound. 22,23 This indicates a low interstitial or "zeolitic" water content phase.…”

mentioning

confidence: 59%

“…[20][21][22][23][24][25] They are also used as precursors for the synthesis of ceramics. 26,27 The phases usually described have the composition Ln 2 (C 2 O 4 ) 3 ·nH 2 O, a rich water phase presenting a weight loss of about 53% between 25 and 650…”

mentioning

confidence: 99%

Magnetocaloric effect in gadolinium-oxalate framework Gd2(C2O4)3(H2O)6⋅(0⋅6H2O)

et al. 2014

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Magnetic refrigerants incorporating Gd3+ ions and light organic ligands offer a good balance between isolation of the magnetic centers and their density. We synthesized the framework material Gd2(C2O4)3(H2O)6⋅0.6H2O by a hydrothermal route and characterized its structure. The honeycomb lattice of Gd3+ ions interlinked by oxalate ligands in the (a,c) plane ensures their decoupling in terms of magnetic exchange interactions. This is corroborated by magnetic measurements indicating negligible interactions between the Gd3+ ions in this material. The magnetocaloric effect was evaluated from isothermal magnetization measurements. The maximum entropy change −ΔSMmax reaches 75.9 mJ cm−3 K−1 (around 2 K) for a moderate field change (2 T).

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Structural, optical and magnetic properties of gadolinium sesquioxide nanobars synthesized via thermal decomposition of gadolinium oxalate

Cited by 21 publications

References 31 publications

White Light Emitting Gadolinium Oxide Nanoclusters for In‐vitro Bio‐imaging

White Light Emitting Gadolinium Oxide Nanoclusters for In‐vitro Bio‐imaging

Nd2O3:Gd3+ nanocrystalline phosphor: γ-Induced thermoluminescence, EPR and structural properties

Magnetocaloric effect in gadolinium-oxalate framework Gd2(C2O4)3(H2O)6⋅(0⋅6H2O)

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