Frequency Upconversion in Core@shell Nanoparticles

Ningthoujam, Raghumani Singh; Joshi, Rashmi; Srivastava, Manas

doi:10.1002/9783527834884.ch10

Cited by 3 publications

(2 citation statements)

References 91 publications

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“…UCNPs were prepared by the thermolysis of respective rare-earth oleates. ,, In a typical procedure, weighed amounts of Gd (III) acetate (0.78 mmol), holmium (III) acetate (0.02 mmol), and ytterbium (III) acetate (0.2 mmol) were taken in a 100 mL round-bottom flask. OA (7 mL) and 1-octadecene (14 mL) were added to it.…”

Section: Methodsmentioning

confidence: 99%

Mesoporous NaGdF₄/Ho–Yb@m-SiO₂ Upconversion Nanophosphors as a Potent Theranostic Probe

Joshi

Patra

Srivastava

et al. 2022

ACS Appl. Nano Mater.

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Nearly monodispersed NaGdF4/Ho–Yb upconversion nanoparticles (UCNPs) are synthesized by thermolysis of respective rare earth oleates. UCNPs are made biocompatible by mesoporous silica (m-SiO2) coating. These particles exhibit red and green bands in the visible range upon excitation at 980 nm laser. Interestingly, because of the presence of Ho3+ ions, these UCNPs can be excited via UV–vis light in addition to the 980 nm near infrared light. A systematic study is carried out to demonstrate the use of these UCNPs as drug (DOX) carriers. Toxicity studies and bio-imaging using DOX-loaded UCNPs have been demonstrated. UCNPs are also radiolabeled with 177Lu using m-SiO2 coating to demonstrate its potential application as a carrier of the therapeutic radionuclide in vivo for radionuclide therapy. Lu-177 adsorption studies are carried out extensively in order to understand the nature of adsorption, and it is found to be a combination of Langmuir and Freundlich isotherm models. Kinetics of adsorption of Lu3+ ions on the m-SiO2 coating of UCNPs is studied. Overall, the synthesis and physicochemical characterization of NaGdF4/Ho–Yb@m-SiO2 upconversion nanocrystals and their potential utilities in multimodal biomedical applications are amply demonstrated.

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Section: Methodsmentioning

confidence: 99%

Mesoporous NaGdF₄/Ho–Yb@m-SiO₂ Upconversion Nanophosphors as a Potent Theranostic Probe

Joshi

Patra

Srivastava

et al. 2022

ACS Appl. Nano Mater.

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“…It has been shown that the magnetic anisotropy, magnetization, and heating proficiency change when the core and shell sizes vary. It is also reported that the variation in the shell thickness has a greater impact on the magnetic properties as compared to the variation in the core size of the core–shell nanostructures. , Two methods such as hot injection and thermolysis are generally used to prepare core and core@shell nanoparticles with size control of monodispersed nanoparticles. − …”

Section: Introductionmentioning

confidence: 99%

Development of Core@Shell γ-Fe₂O₃@Mn_xO_y@SiO₂ Nanoparticles for Hyperthermia, Targeting, and Imaging Applications

Joshi

Shelar

Srivastava

et al. 2022

ACS Appl. Bio Mater.

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Monodispersed core@shell γ-Fe2O3@Mn x O y nanoparticles have been prepared through thermolysis of iron and manganese oleate. Further, these prepared nanoparticles are coated with biocompatible substances such as silica and polyethylene glycol. These particles are highly biocompatible for different cell lines such as normal and cancer cell lines. The nanoparticles are used as hyperthermia agents, and successful hyperthermia treatment in cancer cells is carried out. As compared to γ-Fe2O3@SiO2, γ-Fe2O3@Mn x O y @SiO2 shows the enhanced killing of cancer cells through hyperthermia. In order to make them potential candidates for targeting to cancer cells, folic acid (FA) is tagged to the nanoparticles. Fluorescein isothiocyanate (FITC) is also tagged onto these nanoparticles for imaging. The developed γ-Fe2O3@Mn x O y @SiO2 nanoparticle can act as a single entity for therapy through AC magnetic field, imaging through FITC and targeting through folic acid simultaneously. This is the first report on this material, which is highly biocompatible for hyperthermia, imaging, and targeting.

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Photo-Luminescent Materials: Down-Conversion, Quantum Cutting, Up-Conversion, Photo-Avalanche, Core@Shell Nanostructures

Agrawal,

Srivastava,

Ningthoujam

2023

Indian Institute of Metals Series

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Frequency Upconversion in Core@shell Nanoparticles

Cited by 3 publications

References 91 publications

Mesoporous NaGdF₄/Ho–Yb@m-SiO₂ Upconversion Nanophosphors as a Potent Theranostic Probe

Mesoporous NaGdF₄/Ho–Yb@m-SiO₂ Upconversion Nanophosphors as a Potent Theranostic Probe

Development of Core@Shell γ-Fe₂O₃@Mn_xO_y@SiO₂ Nanoparticles for Hyperthermia, Targeting, and Imaging Applications

Photo-Luminescent Materials: Down-Conversion, Quantum Cutting, Up-Conversion, Photo-Avalanche, Core@Shell Nanostructures

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Frequency Upconversion in Core@shell Nanoparticles

Cited by 3 publications

References 91 publications

Mesoporous NaGdF4/Ho–Yb@m-SiO2 Upconversion Nanophosphors as a Potent Theranostic Probe

Mesoporous NaGdF4/Ho–Yb@m-SiO2 Upconversion Nanophosphors as a Potent Theranostic Probe

Development of Core@Shell γ-Fe2O3@MnxOy@SiO2 Nanoparticles for Hyperthermia, Targeting, and Imaging Applications

Photo-Luminescent Materials: Down-Conversion, Quantum Cutting, Up-Conversion, Photo-Avalanche, Core@Shell Nanostructures

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Product

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Mesoporous NaGdF₄/Ho–Yb@m-SiO₂ Upconversion Nanophosphors as a Potent Theranostic Probe

Mesoporous NaGdF₄/Ho–Yb@m-SiO₂ Upconversion Nanophosphors as a Potent Theranostic Probe

Development of Core@Shell γ-Fe₂O₃@Mn_xO_y@SiO₂ Nanoparticles for Hyperthermia, Targeting, and Imaging Applications