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This book, a collection of 12 original contributions and 4 reviews, provides a selection of the most recent advances in the preparation, characterization, and applications of polymeric nanocomposites comprising nanoparticles. The concept of nanoparticle-reinforced polymers came about three decades ago, following the outstanding discovery of fullerenes and carbon nanotubes. One of the main ideas behind this approach is to improve the matrix mechanical performance. The nanoparticles exhibit higher specific surface area, surface energy, and density compared to microparticles and, hence, lower nanofiller concentrations are needed to attain properties comparable to, or even better than, those obtained by conventional microfiller loadings, which facilitates processing and minimizes the increase in composite weight. The addition of nanoparticles into different polymer matrices opens up an important research area in the field of composite materials. Moreover, many different types of inorganic nanoparticles, such as quantum dots, metal oxides, and ceramic and metallic nanoparticles, have been incorporated into polymers for their application in a wide range of fields, ranging from medicine to photovoltaics, packaging, and structural applications.

ceramizable silicone rubber --- halloysite --- encapsulant --- drug delivery --- fillers --- ultraviolet (UV) curable coatings --- PDMS etching --- nanoparticles --- roughness --- methacryl POSS --- composite --- chlorogenic acid --- hydrophilic --- surface free energy --- theranostics --- 29Si-NMR --- borate --- dental resin --- morphology --- surface --- fabrication --- polydimethylsiloxane --- recessed electrode --- swelling --- MAPOSS --- X-ray (Micro-CT) microtomography --- mechanical properties --- plateau-shaped electrode --- hybrid hydrogel --- hardness --- sugar templating process --- bioactivity --- amphiphilic --- high molecular weight --- low surface energy materials --- PDMS --- quartz microcrystal --- 3D porous network --- fluorinated siloxane resin --- mortar --- surface modification --- poly(dimethylsiloxanes) --- scratch resistance --- multielectrode array (MEA) --- non-releasable --- sol-gel --- topology of polysiloxane chains --- cross-linking --- FTIR --- diethyl carbonate --- poly(ethylene glycol) (PEG) --- TG-FTIR --- organosilane --- anti-bioadhesion --- carbon content --- nanomedicine --- thermal stability --- hybrids --- underexposure --- nanosilica --- hyperbranched poly(methylhydrosiloxanes) --- spinal cord signal recording --- ceramizable mechanism --- coatings --- TG --- silicon --- polysiloxanes --- basalt fibre --- refractive index --- drug release --- thermal conductivity --- hydrolytic polycondensation --- shrinkage --- polyhedral oligomeric silsesquioxanes

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Sol-gel technology is a contemporary advancement in science that requires taking a multidisciplinary approach with regard to its various applications. This book highlights some applications of the sol-gel technology, including protective coatings, catalysts, piezoelectric devices, wave guides, lenses, high-strength ceramics, superconductors, synthesis of nanoparticles, and insulating materials. In particular, for biotechnological applications, biomolecules or the incorporation of bioactive substances into the sol-gel matrix has been extensively studied and has been a challenge for many researchers. Some sol-gel materials are widely applied in light-emitting diodes, solar cells, sensing, catalysis, integration in photovoltaic devices, and more recently in biosensing, bioimaging, or medical diagnosis; others can be considered excellent drug delivery systems. The goal of an ideal drug delivery system is the prompt delivery of a therapeutic amount of the drug to the proper site in the body, where the desired drug concentration can be maintained. The interactions between drugs and the sol-gel system can affect the release rate. In conclusion, the sol-gel synthesis method offers mixing at the molecular level and is able to improve the chemical homogeneity of the resulting composite. This opens new doors not only regarding compositions of previously unattainable materials, but also to unique structures with different applications.

silsesquioxanes --- thiol-ene click reaction --- conformal coating --- multi-layer --- oxyfluoride glass-ceramics --- nanocrystal --- lithium lanthanum titanium oxide --- surface plasmon resonance --- chlorogenic acid --- thin-disk laser --- biomedical applications --- biomaterials --- potential step voltammetry --- mechanical analysis --- metal oxides --- biocompatibility --- tungsten oxide --- Li-ion batteries --- sol-gel technique --- optical properties --- bioactivity --- LiMnxFe(1?x)PO4 --- computer-aided design (CAD) --- hybrid materials --- resistive random access memory (RRAM) --- poly(?-caprolactone) --- Yb-doped glasses --- electrochemical impedance spectroscopy --- organic–inorganic hybrid materials --- carbon coating --- ultrasonic spray deposition --- 1D structure --- hydrophobic coatings --- sol-gel --- organic-inorganic hybrids --- composites --- paper --- wettability --- pseudo-diffusion coefficient --- lithium-ion battery --- cytotoxicity --- X-ray diffraction analysis --- TG-FTIR --- Fourier transform infrared spectroscopy (FTIR) analysis --- photoluminescence --- cell proliferation --- cell cycle --- aluminosilicate glasses --- finite element analysis (FEA) --- optical sensors --- hollow sphere --- TG-DSC --- NMR --- cotton fabric --- organic thin-film transistor (OTFT) --- one transistor and one resistor (1T1R) --- sol–gel method --- SiO2–based hybrids --- sol-gel method --- in situ water production