Preparation and colloidal behaviour of surface-modified EuF3

Сафронихин, А. В.; Shcherba, T. N.; Ehrlich, H. V.; Лисичкин, Г. В.

doi:10.1016/j.apsusc.2009.04.196

Cited by 19 publications

(6 citation statements)

References 22 publications

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“…So it is rather difficult to make unambiguous conclusion about chemical bonding of Trp to the nanoparticle surface, but we can refer to [28] where surface complex formation by interaction between Trp and ZnO nanoparticles was proved. For LaF 3 nanoparticles, formation of the surface complexes is described for citric acid [13,29], glycine [13], 4-(2-pyridylazo)resorcinol [30,31], 1,3-diketones [32], and 1,10-phenanthroline [32]. Strong chemical bonding of Trp to the surface is supported by the fact that it is not eliminated after numerous washings.…”

Section: Resultsmentioning

confidence: 93%

LaF3 nanoparticles surface modified with tryptophan and their optical properties

Сафронихин¹,

Ehrlich²,

Лисичкин³

2014

Applied Surface Science

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Section: Resultsmentioning

confidence: 93%

LaF3 nanoparticles surface modified with tryptophan and their optical properties

Сафронихин¹,

Ehrlich²,

Лисичкин³

2014

Applied Surface Science

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“…This method is used for modification of ionic crystals with the same modifiers as in the first case: OA [22], citric acid [9,11,49], 2 aminoethylphosphate [8,29], dialkylphosphate [28], and dialkyldithiophosphate [28,31,32].…”

Section: Modification In Situmentioning

confidence: 99%

“…It was shown in [49] that a small excess of Eu 3+ in relation to Fby stoichiometry leads to the production of EuF 3 nanoparticles with a smaller average diameter and narrower size distribution, which is reflected in the greater stability of colloids. It was also established that mainly only one carboxylic group of citrate ion takes part in complexing; the two others remain unbound and, being deprotonated, promote the sta bility of aqueous colloids of EuF 3 .…”

Section: Modification In Situmentioning

confidence: 99%

“…The latter form conjugates by interacting with doxorubicine. Unbounded external carboxylic groups in the surface citrate complexes can coordinate metal ions, resulting in the formation of bimetallic complexes on the sur face [49]. Moreover, the catalytic addition reactions of styrene derivative to the modifier with the vinyl group and the acetylene derivative to the terminal azide group are described [56].…”

Section: Chemical Transformation Of a Graft Layermentioning

confidence: 99%

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Chemical modification of the surface of highly dispersed metal salt crystals

Сафронихин

Ehrlich

Лисичкин

2014

Prot Met Phys Chem Surf

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Approaches to chemical modification of surfaces of metal salt crystals, which until recently are not considered objects for surface modification, are collected and analyzed. Possibilities of postsynthetic modification and modification in situ during synthesis of metal salt nanoparticles are discussed. Data for structures of the surface complexes forming upon the interaction of modifiers (organic molecules) and ions on a particle surface and the stability and properties of such complexes are given. Areas of and prospects for practical application of different surface modified metal salts are shown.

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“…To obtain particles with a negatively charged surface, nanoparticles are often coated with surface ligands. Citric acid or amino acids (glutamic or aspartic) are usually used as biocompatible ligands [ 31 , 32 , 33 , 34 ]. This choice is due to the presence of two or more carboxyl groups.…”

Section: Introductionmentioning

confidence: 99%

BaGdF5 Nanophosphors Doped with Different Concentrations of Eu3+ for Application in X-ray Photodynamic Therapy

Gadzhimagomedova

Polyakov

Панкин

et al. 2021

IJMS

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X-ray photodynamic therapy (XPDT) has been recently considered as an efficient alternative to conventional radiotherapy of malignant tissues. Nanocomposites for XPDT typically consist of two components—a nanophosphor which re-emits X-rays into visible light that in turn is absorbed by the second component, a photosensitizer, for further generation of reactive oxygen species. In this study, BaGdF5 nanophosphors doped with different Eu:Gd ratios in the range from 0.01 to 0.50 were synthesized by the microwave route. According to transmission electron microscopy (TEM), the average size of nanophosphors was ~12 nm. Furthermore, different coatings with amorphous SiO2 and citrates were systematically studied. Micro-CT imaging demonstrated superior X-ray attenuation and sufficient contrast in the liver and the spleen after intravenous injection of citric acid-coated nanoparticles. In case of the SiO2 surface, post-treatment core–shell morphology was verified via TEM and the possibility of tunable shell size was reported. Nitrogen adsorption/desorption analysis revealed mesoporous SiO2 formation characterized by the slit-shaped type of pores that should be accessible for methylene blue photosensitizer molecules. It was shown that SiO2 coating subsequently facilitates methylene blue conjugation and results in the formation of the BaGdF5: 10% Eu3+@SiO2@MB nanocomposite as a promising candidate for application in XPDT.

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Preparation and colloidal behaviour of surface-modified EuF3

Cited by 19 publications

References 22 publications

LaF3 nanoparticles surface modified with tryptophan and their optical properties

LaF3 nanoparticles surface modified with tryptophan and their optical properties

Chemical modification of the surface of highly dispersed metal salt crystals

BaGdF5 Nanophosphors Doped with Different Concentrations of Eu3+ for Application in X-ray Photodynamic Therapy

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