Applications of hybrid organic–inorganic nanocomposites

Sánchez, Clément; Forés, Beatriz; Belleville, Philippe; Popall, Michael

doi:10.1039/b509097k

Cited by 2,444 publications

(1,691 citation statements)

References 273 publications

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“…1 The tailoring of these hybrid structures (and hence of their corresponding properties) passes for the capability of exploiting the synergy between the intrinsic characteristics of sol-gel derived organic-inorganic hybrid hosts-such as highly controlled purity, versatile shaping and patterning, easy control of the refractive index, photosensitivity, encapsulation of large amounts of isolated emitting centres, mechanical, optical and/or electronic properties, thermal and chemical stability, biocompatibility, hydrophobic-hydrophilic balance-and the luminescence features of Ln 3+ ions-such as high luminescence quantum yield, narrow bandwidth, long-lived emission, large Stokes shifts, and ligand-dependent luminescence sensitization. [2][3][4] All of these features offer excellent prospects for designing new luminescent materials with enhanced desired characteristics and high added value for specific targeted applications, thus opening exciting new directions in materials science and related technologies, with noteworthy results in the ecofriendly integration, miniaturization and multifunctionalization of devices.…”

Section: Introductionmentioning

confidence: 99%

Progress on lanthanide-based organic–inorganic hybrid phosphors

et al. 2011

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Research on organic-inorganic hybrid materials containing trivalent lanthanide ions (Ln 3+ ) is a very active field that has rapidly shifted in the last couple of years to the development of eco-friendly, versatile and multifunctional systems, stimulated by the challenging requirements of technological applications spanning domains as diverse as optics, environment, energy, and biomedicine. This tutorial review offers a general overview of the myriad of advanced Ln 3+ -based organic-inorganic hybrid materials recently synthesised, which may be viewed as a major innovation in areas of phosphors, lighting, integrated optics and optical telecommunications, solar cells, and biomedicine.

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Section: Introductionmentioning

confidence: 99%

Progress on lanthanide-based organic–inorganic hybrid phosphors

et al. 2011

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“…The process has the following advantages: (I) The stoichiometry is easy to control and adjust 4 , (II) it allows to fabricate high-purity films with evenly distributed components 17 , and (III) the film can be processed under normal pressures and low temperature. In the last few decades, a large number of hybrid materials produced through the sol-gel process have been prepared using various inorganic precursors and polymers 18,19 .…”

Section: Introductionmentioning

confidence: 99%

“…Hybridization is not only a creative alternative to the design of new materials but also offers unique opportunities to develop innovative industrial applications 4 . These materials combine the hardness, wear resistance and thermal stability of the ceramic component with the flexibility, transparency and tunable adhesion of the organic materials [5][6][7][8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

New Sol-gel Formulations to Increase the Barrier Effect of a Protective Coating Against the Corrosion and Wear of Galvanized Steel

et al. 2015

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This study proposes a new pretreatment method that uses alkoxide precursors with a plasticizing agent; the purpose of this study is to improve the electrochemical and mechanical properties of a galvanized steel surface. Galvanized steel was covered with a hybrid film obtained from a sol that consisted of two alkoxide precursors, 3 -(trimethoxysilylpropyl) methacrylate (TMSM) and tetraethoxysilane (TEOS), with nitrate cerium in a concentration of 0.01 M and a polyethylene glycol (PEG) plasticizer. The hybrid coatings were obtained by dip-coating method with various concentrations of plasticizer (0, 20, 40 and 60 g.L -1 ). The hybrid films were analyzed by scanning electron microscopy (SEM), profilometry, contact angle measurements, a tribometer with the type-setting ball on the plate and electrochemical tests. The addition of the plasticizer into the hybrid films improves the corrosion resistance behavior compared to the sample without the plasticizer. The addition of 20 g.L -1 of plasticizer showed the best performance in the electrochemical tests. The mechanical behavior results indicated that higher PEG concentrations resulted in films with enhanced durability.

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“…The chemistry of the sol-gel process is well known [7][8][9] with excellent reviews [6,10,11] and books [12] available. The most common sol-gel materials used as coatings are based on organically modified silicates (Ormosils), which are formed by the hydrolysis and condensation of trialkoxy silanes precursors [13,14].…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection of AA 2024-T3 aluminium alloys using 3, 4-diaminobenzoic acid chelated zirconium–silane hybrid sol–gels

Varma

Colreavy

Cassidy³

et al. 2010

Thin Solid Films

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Organic-inorganic polymers formed by hydrolysis/condensation reactions of alkoxide precursors, such as organically modified silanes (Ormosils) are used for several industrial applications such as electronic, optical and protective anticorrosion coatings. Such materials possess superior chemical stability, physical strength and scratch resistance characteristics when compared to organic polymers. Further performance improvement can be achieved through the incorporation of zirconium and titanium based nanoparticles, also formed through from precursors via the sol-gel process. However due to the inherent reactivity differences of the above precursors, they must be hydrolysed separately before being combined for final condensation. Zirconium precursors are commonly chelated using acetic acid or acetyl acetonate prior to hydrolysis, to lower the hydrolysis rate. In this body of work, 3,4-diaminobenzoic acid (DABA) and acetyl acetonate (acac) were compared as chelating ligands for controlling the hydrolysis reactions of zirconium n-propoxide to form nanoparticles within a silane sol matrix. The sols were applied as coatings on aerospace grade aluminium alloy AA 2024-T3 and characterised by physical, spectroscopical, microscopical, electrochemical and calorimetric techniques. The electrochemical properties of the coatings, as characterised by EIS and PDS, correlated with neutral salt spray evaluations confirming that the use of DABA as a chelating ligand significantly improved the coating performance when compared to the traditional diketone ligand. The data indicates the anticorrosion properties of the nitrogen rich chelate have a key role in protecting the alloy through the formation of smaller zirconium nanoparticles, thus improving the polymer network stability.

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Applications of hybrid organic–inorganic nanocomposites

Cited by 2,444 publications

References 273 publications

Progress on lanthanide-based organic–inorganic hybrid phosphors

Progress on lanthanide-based organic–inorganic hybrid phosphors

New Sol-gel Formulations to Increase the Barrier Effect of a Protective Coating Against the Corrosion and Wear of Galvanized Steel

Corrosion protection of AA 2024-T3 aluminium alloys using 3, 4-diaminobenzoic acid chelated zirconium–silane hybrid sol–gels

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