Nonordered porous silica-based pure inorganic and hybrid organic-inorganic materials prepared by a nonaqueous, nonthermal sol-gel process

Rodríguez-Garnica, Paulina; Salazar-Hernández, Mercedes; Maldonado-Estudillo, Jaime; Saldaña‐Piña, Noe; Sotelo-Rodríguez, Georgina; Huichapa-Rocha, Brenda; González‐García, Gerardo; Alatorre-Ordaz, Alejandro; Gutiérrez, J.A.

doi:10.1016/j.matchemphys.2019.02.093

Cited by 7 publications

(3 citation statements)

References 71 publications

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“…Luminescent inorganic nanoparticles (NPs) of various compositions are attracting a vivid interest by virtue of their phase homogeneity, enhanced tunability of the physical and chemical properties, and suitability for the design and fabrication of nanocomposites . In recent years, modern synthesis routes have led to the fabrication of new nanoscale materials with outstanding optical properties arising from their improved crystal phase and composition, narrow size distribution, and uniform shape . Luminescent NPs—metals, semiconductors, or insulators—have come to the forefront in modern solid state physics, lighting, next generation electronics, and sensing, in the environmental and life science, as well as in medical and biological fields .…”

Section: Introductionmentioning

confidence: 99%

The Bright X‐Ray Stimulated Luminescence of HfO₂ Nanocrystals Activated by Ti Ions

Villa

Moretti

Fasoli

et al. 2019

Advanced Optical Materials

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The recent trends in scintillator technologies stimulate research efforts toward the development of novel materials morphologies, such as nanoparticles, able to efficiently convert ionizing radiations into light. For example, scintillating nanoparticles attract great interest in medical oncological therapies. In this work, the structural and morphological properties of HfO2:Ti nanoparticles with Ti concentrations from 0.03 to 10 mol% and subjected to calcination up to 1000 °C are thoroughly characterized; moreover, X‐ray photoelectron spectroscopy reveals the incorporation of Ti in both Ti (III) and Ti (IV) chemical states in as prepared samples, while the exclusive presence of Ti(IV) is unambiguously identified in calcined nanoparticles. The optical emission under X‐ray excitation evidences an intense Ti (IV)‐related luminescence at 2.5 eV in high temperature calcined samples with a few microseconds scintillation lifetime, and efficiency comparable to that of Bi4Ge3O12 reference scintillator. Finally, the competitive role of defects in charge carriers capture is demonstrated by the monotonic increase of the 2.5 eV band during prolonged X‐ray irradiation, more evident for nanoparticles with titanium concentration below 1 mol%. HfO2:Ti may also find application in X‐ray triggered oncological therapies by using the Ti (IV)‐related bright radioluminescence to excite photosensitizer molecules for singlet oxygen generation.

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Section: Introductionmentioning

confidence: 99%

The Bright X‐Ray Stimulated Luminescence of HfO₂ Nanocrystals Activated by Ti Ions

Villa

Moretti

Fasoli

et al. 2019

Advanced Optical Materials

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“…The formation of hydrogen bonds between silica and hydroxyl groups of polysaccharides has been cited as a clarification for the detected effect of silica templates and the improvement of the viscoelastic characteristics of hybrid materials. [162,163] The addition of silicon dioxide nanoparticles was found to affect the gelation of 𝜅-carrageenan polysaccharides through lower viscoelastic modulus, gelation, and melting temperatures. Results suggested that with minimal particle size and loading, particles act as steric hinderance to chain aggregation, making gelation process more tough.…”

Section: Carrageenan-based Hybrids With Silica Nanoparticlesmentioning

confidence: 99%

Carrageenan‐Based Hybrids with Biopolymers and Nano‐Structured Materials for Biomimetic Applications

et al. 2022

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Carrageenan is an algal‐originated group of polysaccharides with unusual structural and functional capabilities, desired for different biomimetic applications due to their renewable, biocompatible, and biodegradable nature. Carrageenan‐based hybrids (nano‐/biocomposites) with different biopolymers and nano‐structured materials have been widely reported as potential candidates for bone/cartilage tissue engineering, delivery of drugs/bioactive ingredients, wound healing, and 3D bioprinting applications. Owning to the broad‐scale biomimetic applications of carrageenan‐based materials, this review aims to summarize carrageenan chemistry and distinct physicochemical features of biopolymeric and/or nanostructured materials‐based on carrageenans in a detailed manner. Herein, different biopolymers (such as chitosan, cellulose, starch, and alginates), and nano‐structured materials (such as silica nanoparticles, magnetic/non‐magnetic nanocarriers, graphene oxide nanoparticles, carbon nanotubes/nanorods, metal oxide nanoparticles) are comprehensively described in combination with carrageenan. However, carrageenan toxicity studies have presented major challenges that need to be addressed when using carrageenan‐based materials for biomedical and therapeutic purposes. Several existing challenges, prospects, and research recommendations are described at the end of this review.

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“…Meanwhile, not only do organic applications help to improve conventional electronic devices but also the widespread crystal compounds are increasingly involved in the development of flexible electronics. Implementing inorganic materials in organic structures enhances the performance and gives rise to the next generation of organic devices …”

Section: Introductionmentioning

confidence: 99%

Melt Spin Coating for X‐Ray‐Sensitive Hybrid Organic–Inorganic Layers of Small Carbazolyl‐Containing Molecules Blended with Tungsten

Dobužinskas

Poškus

Viliũnas

et al. 2019

Physica Status Solidi (a)

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For the first time, a blend of carbazolyl‐containing small molecules and tungsten particles for X‐ray‐sensitive layers is developed using the solvent‐free melt spin‐coating (MSC) method. The composite films fabricated on a glass substrate, using aluminum as electrodes, are applied for direct current conversion of X‐rays with high signal‐to‐noise ratio, reliable on–off switching characteristics, and short‐ and long‐term stability. To elucidate the processes of charge carrier generation by X‐rays, Monte Carlo simulations of X‐ray‐induced current are performed. The response and charge transfer processes investigated by an X‐ray pulse experiment indicate possibilities for real‐time detection.

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Nonordered porous silica-based pure inorganic and hybrid organic-inorganic materials prepared by a nonaqueous, nonthermal sol-gel process

Cited by 7 publications

References 71 publications

The Bright X‐Ray Stimulated Luminescence of HfO₂ Nanocrystals Activated by Ti Ions

The Bright X‐Ray Stimulated Luminescence of HfO₂ Nanocrystals Activated by Ti Ions

Carrageenan‐Based Hybrids with Biopolymers and Nano‐Structured Materials for Biomimetic Applications

Melt Spin Coating for X‐Ray‐Sensitive Hybrid Organic–Inorganic Layers of Small Carbazolyl‐Containing Molecules Blended with Tungsten

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Nonordered porous silica-based pure inorganic and hybrid organic-inorganic materials prepared by a nonaqueous, nonthermal sol-gel process

Cited by 7 publications

References 71 publications

The Bright X‐Ray Stimulated Luminescence of HfO2 Nanocrystals Activated by Ti Ions

The Bright X‐Ray Stimulated Luminescence of HfO2 Nanocrystals Activated by Ti Ions

Carrageenan‐Based Hybrids with Biopolymers and Nano‐Structured Materials for Biomimetic Applications

Melt Spin Coating for X‐Ray‐Sensitive Hybrid Organic–Inorganic Layers of Small Carbazolyl‐Containing Molecules Blended with Tungsten

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Product

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The Bright X‐Ray Stimulated Luminescence of HfO₂ Nanocrystals Activated by Ti Ions

The Bright X‐Ray Stimulated Luminescence of HfO₂ Nanocrystals Activated by Ti Ions