Effect of solution pH value changes on fluorescence intensity of magnetic-luminescent Fe3O4@Gd2O3:Eu3+ nanoparticles

Wu, Tianhui; Pan, Huayan; Chen, Rubiao; Luo, Dong; Zhang, Hong; Shen, Ye; Li, Yanghui; Wang, Le

doi:10.1016/s1002-0721(14)60581-0

Cited by 18 publications

(4 citation statements)

References 29 publications

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“…When the layer of UCNPs was induced, the saturation magnetization was 3.6 emu g -1 (Figure S6). After further modification with PEG, the saturation magnetization decreased to 1.7 emu g -1 due to the coverage of nonmagnetic layers 43, random movement of Brownian motion 44, and the thermally blocked solid state of the FeCUPs. As shown in the inset in Figure 2B, FeC can be clustered on the side of the magnetic field, indicating that FeC has magnetization characteristics.…”

Section: Resultsmentioning

confidence: 99%

Upconversion-Magnetic Carbon Sphere for Near Infrared Light-Triggered Bioimaging and Photothermal Therapy

et al. 2019

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Nanoparticle-based theranostics combines tumor imaging and cancer therapy in one platform, but the synthesis of theranostic agents is impeded by chemical groups on the surface and the size and morphology of the components. Strategies to construct a multifunctional platform for bioimaging and photothermal therapy (PTT) are urgently needed. A new upconversion-magnetic agent (FeCUPs) based on hollow carbon spheres, which is both a photothermal agent and a dual carrier of luminescent and magnetic nanoparticles, provides an effective approach for tumor elimination. Methods: The morphology of FeCUPs was characterized for the construction and size adjustment of the theranostic agent using transmission electron microscopy, high-resolution transmission electron microscopy, energy dispersive spectroscopy and high angle annular dark field scanning transmission electron microscopy. The distribution of FeCUPs was tracked under in-situ upconversion luminescence (UCL) imaging and magnetic resonance imaging (MRI) in vivo . Photothermal therapy was carried out on tumor-bearing mice, after which the toxicity of PTT was evaluated by a blood biochemistry test and histological section analysis. Results: Stable and uniform loading of luminescent nanocomposites on three-dimensional carbon materials is reported for the first time. Based on the mechanism of synthesis, the size of the hybrid particles was adjusted from micrometers to nanometers. External magnetic field-enhanced photothermal therapy with multi-model imaging was accomplished using FeCUPs. Moreover, no cancer recurrence was found during 14 days of recovery without PTT. Conclusions: Hollow carbon spheres, photothermal agents loaded with upconversion nanoparticles inside and magnetic nanoparticles outside were prepared for photothermal therapy. The aggregation of FeCUPs in tumors by the local magnetic field was verified by MRI and UCL imaging, and PTT was enhanced.

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Section: Resultsmentioning

confidence: 99%

Upconversion-Magnetic Carbon Sphere for Near Infrared Light-Triggered Bioimaging and Photothermal Therapy

et al. 2019

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“…However, heating it above 150 °C increases absorption and fluorescence in the visible light range, similar to heating imidazole ILs above 150 °C. Moreover, the fluorescence intensity has been related to polarity [ 35 ], temperature [ 36 , 37 ], pH value [ 38 , 39 ] and others [ 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

N-octylpyridine hydrogen sulphate ionic liquid for multifunctional fluorescent response in different solvents

Tian,

Shao,

Kang

et al. 2024

Heliyon

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“…Interest in magnetic nanoparticles, in particular, iron oxide nanoparticles, is due to their good biocompatibility, resistance to external influences, the possibility of surface modification, etc. [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, most of the synthesis methods imply a complex chain of sequential modifications and operations, which entails high energy and resource consumption. However, despite the large number of works in this area [8,[15][16][17][18][19][20][21], studies related to the search for optimal conditions for obtaining nanoparticles and the effect of their structural and phase modifications on biocompatibility and toxicity are still relevant and have great prospects for study.…”

Section: Introductionmentioning

confidence: 99%

Fe2O3 Nanoparticles Doped with Gd: Phase Transformations as a Result of Thermal Annealing

et al. 2021

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The aim of this work is to study the effect of the phase composition of the synthesized Fe2O3-Gd2O3 nanoparticles on the efficiency of using magnetic hyperthermia as a basis for experiments. This class of structures is one of the most promising materials for biomedical applications and magnetic resonance imaging. In the course of the study, the dynamics of phase transformations of nanoparticles Fe2O3 → Fe2O3/GdFeO3 → GdFeO3 were established depending on the annealing temperature. It has been determined that the predominance of the GdFeO3 phase in the structure of nanoparticles leads to an increase in their size from 15 to 40 nm. However, during experiments to determine the resistance to degradation and corrosion, it was found that GdFeO3 nanoparticles have the highest corrosion resistance. During the hyperthermal tests, it was found that a change in the phase composition of nanoparticles, as well as their size, leads to an increase in the heating rate of nanoparticles, which can be further used for practical purposes.

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Effect of solution pH value changes on fluorescence intensity of magnetic-luminescent Fe3O4@Gd2O3:Eu3+ nanoparticles

Cited by 18 publications

References 29 publications

Upconversion-Magnetic Carbon Sphere for Near Infrared Light-Triggered Bioimaging and Photothermal Therapy

Upconversion-Magnetic Carbon Sphere for Near Infrared Light-Triggered Bioimaging and Photothermal Therapy

N-octylpyridine hydrogen sulphate ionic liquid for multifunctional fluorescent response in different solvents

Fe2O3 Nanoparticles Doped with Gd: Phase Transformations as a Result of Thermal Annealing

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