Production and optoelectronic response of Tb<sup>3+</sup>activated gadolinium oxide nanocrystalline phosphors

Hazarika, Samiran; Mohanta, Dambarudhar

doi:10.1051/epjap/2013130068

Cited by 18 publications

(7 citation statements)

References 31 publications

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“…Where α=absorption coefficient, h=Plank constant, ν=photon frequency. 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: 89%

“…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] Next, the relative quantum yield of the nanoclusters was evaluated using quinine sulfate and rhodamine 6G as reference dyes in the blue and green regions, respectively.…”

Section: Applications Of Gd 2 O 3 Nanoclustersmentioning

confidence: 99%

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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: 89%

Section: Applications Of Gd 2 O 3 Nanoclustersmentioning

confidence: 99%

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

et al. 2022

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“…Rare-earth oxides are advanced materials widely used as host lattices to develop sensors and luminescent materials [21]. They are recognized for their excellent chemical and thermal stability [22], low phonon energy (~300-600 cm −1 ), and the facility on which they can be doped with lanthanide ions [23,24]. Gadolinium oxide (Gd 2 O 3 ) is considered one of the most promising materials for developing contrast agents for magnetic resonance and fluorescence imaging [25].…”

Section: Optical Properties Of Gadolinium-based Oxide and Oxysulfide Materials 21 Gadolinium-based Oxidementioning

confidence: 99%

An Overview of Gadolinium-Based Oxide and Oxysulfide Particles: Synthesis, Properties, and Biomedical Applications

et al. 2021

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In the last decade, the publications presenting novel physical and chemical aspects of gadolinium-based oxide (Gd2O3) and oxysulfide (Gd2O2S) particles in the micro- or nano-scale have increased, mainly stimulated by the exciting applications of these materials in the biomedical field. Their optical properties, related to down and upconversion phenomena and the ability to functionalize their surface, make them attractive for developing new probes for selective targeting and emergent bioimaging techniques, either for biomolecule labeling or theranostics. Moreover, recent reports have shown interesting optical behavior of these systems influenced by the synthesis methods, dopant amount and type, particle shape and size, and surface functionality. Hence, this review presents a compilation of the latest works focused on evaluating the optical properties of Gd2O3 and Gd2O2S particles as a function of their physicochemical and morphological properties; and also on their novel applications as MRI contrast agents and drug delivery nanovehicles, discussed along with their administration routes, biodistribution, cytotoxicity, and clearance mechanisms. Perspectives for this field are also identified and discussed.

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“…Nanoparticles composed of gadolinium oxide (Gd 2 O 3 ) have recently attracted a great deal of attention in the field of biomedicine due to the exceptional optical and magnetic properties that they possess [ 21 , 22 ]. In MRI, they can act as contrast agents, and they also have the potential to be used for targeted medication administration, the treatment of hyperthermia, and in vitro imaging [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Vibrio cholerae by Amine Functionalized Biocompatible Gadolinium Oxide Nanoparticles

et al. 2023

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Herein, we report the biocompatible amine-functionalized gadolinium oxide nanoparticles (Gd2O3 NPs) for the possibility of electrochemical detection of Vibrio cholerae (Vc) cells. The microwave irradiation process is applied to synthesize Gd2O3 NPs. The amine (NH2) functionalization is carried out via overnight stirring with 3(Aminopropyl)triethoxysilane (APTES) at 55 °C. The size of NPs amine functionalized APETS@Gd2O3 NPs are determined by transmission electron microscopy (TEM). APETS@Gd2O3 NPs are further electrophoretically deposited onto indium tin oxide (ITO) coated glass substrate to obtain working electrode surface. The monoclonal antibodies (anti-CT) specific to cholera toxin associated to Vc cells are covalently immobilized onto the above electrodes using EDC-NHS chemistry and further BSA is added to obtain the BSA/anti-CT/APETS@Gd2O3/ITO immunoelectrode. Further, this immunoelectrode shows the response for cells in CFU range from 3.125 × 106 to 30 × 106 and is very selective with sensitivity and LOD 5.07 mA CFUs mL cm−2 and 0.9375 × 106 CFU respectively. To establish a future potential for APTES@Gd2O3 NPs in field of biomedical applications and cytosensing, the effect of APTES@Gd2O3 NPs on mammalian cells is also observed using in vitro cytotoxicity assay and cell cycle analysis.

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Production and optoelectronic response of Tb³⁺activated gadolinium oxide nanocrystalline phosphors

Cited by 18 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

An Overview of Gadolinium-Based Oxide and Oxysulfide Particles: Synthesis, Properties, and Biomedical Applications

Electrochemical Detection of Vibrio cholerae by Amine Functionalized Biocompatible Gadolinium Oxide Nanoparticles

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Production and optoelectronic response of Tb3+activated gadolinium oxide nanocrystalline phosphors

Cited by 18 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

An Overview of Gadolinium-Based Oxide and Oxysulfide Particles: Synthesis, Properties, and Biomedical Applications

Electrochemical Detection of Vibrio cholerae by Amine Functionalized Biocompatible Gadolinium Oxide Nanoparticles

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Production and optoelectronic response of Tb³⁺activated gadolinium oxide nanocrystalline phosphors