Journal articles: 'Hybrid Core-Shell Nanoparticles'

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Barachevsky, V. A. "Photochromic Core-shell Nanoparticles." Current Chinese Science 1, no. 2 (April 19, 2021): 241–50. http://dx.doi.org/10.2174/2210298101666210114100325.

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The results of spectral-kinetic studies in the field of nanophotochromism of the core‒ shell type hybrid compounds are integrated. The properties of photochromic nanoparticles based on photochromic spirocompounds (spiropyrans and spirooxazines), chromenes, and diarylethenes and nanoparticles of noble metals (Ag and Au), diamonds, graphene and its oxide, silica, fullerenes, and quantum dots are considered. Preparation methods of photochromic nanoparticles have been developed.

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Daigle, Jean-Christophe, and Jerome P. Claverie. "A Simple Method for Forming Hybrid Core-Shell Nanoparticles Suspended in Water." Journal of Nanomaterials 2008 (2008): 1–8. http://dx.doi.org/10.1155/2008/609184.

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Core-shell hybrid nanoparticles, where the core is an inorganic nanoparticle and the shell an organic polymer, are prepared by a two-step method. Inorganic nanoparticles are first dispersed in water using poly(acrylic acid) (PAA) prepared by reversible addition fragmentation chain transfer (RAFT) polymerization as dispersant. Then, the resulting dispersion is engaged in a radical emulsion polymerization process whereby a hydrophobic organic monomer (styrene and butyl acrylate) is polymerized to form the shell of the hybrid nanoparticle. This method is extremely versatile, allowing the preparation of a variety of nanocomposites with metal oxides (alumina, rutile, anatase, barium titanate, zirconia, copper oxide), metals (Mo, Zn), and even inorganic nitrides (Si3N4).

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Jain, Shweta, Mudit Kumar, Pushpendra Kumar, Jyoti Verma, Jessica M. Rosenholm, Kuldeep K. Bansal, and Ankur Vaidya. "Lipid–Polymer Hybrid Nanosystems: A Rational Fusion for Advanced Therapeutic Delivery." Journal of Functional Biomaterials 14, no. 9 (August 23, 2023): 437. http://dx.doi.org/10.3390/jfb14090437.

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Lipid nanoparticles (LNPs) are spherical vesicles composed of ionizable lipids that are neutral at physiological pH. Despite their benefits, unmodified LNP drug delivery systems have substantial drawbacks, including a lack of targeted selectivity, a short blood circulation period, and in vivo instability. lipid–polymer hybrid nanoparticles (LPHNPs) are the next generation of nanoparticles, having the combined benefits of polymeric nanoparticles and liposomes. LPHNPs are being prepared from both natural and synthetic polymers with various techniques, including one- or two-step methods, emulsification solvent evaporation (ESE) method, and the nanoprecipitation method. Varieties of LPHNPs, including monolithic hybrid nanoparticles, core–shell nanoparticles, hollow core–shell nanoparticles, biomimetic lipid–polymer hybrid nanoparticles, and polymer-caged liposomes, have been investigated for various drug delivery applications. However, core–shell nanoparticles having a polymeric core surrounded by a highly biocompatible lipid shell are the most commonly explored LPHNPs for the treatment of various diseases. In this review, we will shed light on the composition, methods of preparation, classification, surface functionalization, release mechanism, advantages and disadvantages, patents, and clinical trials of LPHNPs, with an emphasis on core–shell-structured LPHNPs.

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Islam, Mohammad Ariful, Emma K. G. Reesor, Yingjie Xu, Harshal R. Zope, Bruce R. Zetter, and Jinjun Shi. "Biomaterials for mRNA delivery." Biomaterials Science 3, no. 12 (2015): 1519–33. http://dx.doi.org/10.1039/c5bm00198f.

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Schematic representation of various biomaterial-based systems for mRNA delivery: (a) protamine–mRNA complex; (b) lipid nanoparticle; (c) lipid nanoparticle with inorganic compounds (e.g.apatite); (d) cationic polymeric nanoparticle; (e) lipid–polymer hybrid nanoparticles including (i) mRNA–polymer complex core surrounded by a lipid shell and (ii) polymer core surrounded by a lipid shell with mRNA absorbed onto the surface; and (f) gold nanoparticle.

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Jahns, Mandy, Dawid Peter Warwas, Marc Robert Krey, Katharina Nolte, Sandra König, Michael Fröba, and Peter Behrens. "Nanoporous hybrid core–shell nanoparticles for sequential release." Journal of Materials Chemistry B 8, no. 4 (2020): 776–86. http://dx.doi.org/10.1039/c9tb01846h.

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Arici, Elif, Dieter Meissner, F. Schäffler, and N. Serdar Sariciftci. "Core/shell nanomaterials in photovoltaics." International Journal of Photoenergy 5, no. 4 (2003): 199–208. http://dx.doi.org/10.1155/s1110662x03000333.

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Hybrid materials consist of inorganic nanoparticles embedded in polymer matrices. An advantage of these materials is to combine the unique properties of one or more kinds of inorganic nanoparticles with the film forming properties of polymers. Most of the polymers can be processed from solution at room temperature enabling the manufacturing of large area, flexible and light weight devices. To exploit the full potential for the technological applications of the nanocrystalline materials, it is very important to endow them with good processing attributes. The surface of the inorganic cluster can be modified during the synthesis by organic surfactants. The surfactant can alter the dispersion characteristic of the particles by initiating attractive forces with the polymer chains, in which the particles should be homogenously arranged. In this review, we present wet chemical methods for the synthesis of nanoparticles, which have been used as photovoltaic materials in polymer blends. The photovoltaic performance of various inorganic/organic hybrid solar cells, prepared via spin-coating will be the focus of this contribution.

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ZHANG, LI, and LIANGFANG ZHANG. "LIPID–POLYMER HYBRID NANOPARTICLES: SYNTHESIS, CHARACTERIZATION AND APPLICATIONS." Nano LIFE 01, no. 01n02 (March 2010): 163–73. http://dx.doi.org/10.1142/s179398441000016x.

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Nanotechnology has been extensively explored in the past decade to develop a myriad of functional nanostructures to facilitate the delivery of therapeutic and imaging agents for various medical applications. Liposomes and polymeric nanoparticles represent two primary delivery vehicles that are currently under investigation. While many advantages of these two particle platforms have been disclosed, some intrinsic limitations remain to limit their applications at certain extent. Recently, a new type of nanoparticle platform, named lipid–polymer hybrid nanoparticle, has been developed that combines the positive attributes of both liposomes and polymeric nanoparticles while excluding some of their shortages. This new nanoparticle consists of a hydrophobic polymeric core, a lipid shell surrounding the polymeric core, and a hydrophilic polymer stealth layer outside the lipid shell. In this review, we first introduce the synthesis and surface functionalization techniques of the lipid–polymer hybrid nanoparticle, followed by a review of typical characterization of the particles. We then summarize the current and potential medical applications of this new nanoparticle as a delivery vehicle of therapeutic and imaging agents. Finally we highlight some challenges faced in further developing this robust delivery platform.

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Huang, Yuxiong, Aaron N. Fulton, and Arturo A. Keller. "Optimization of porous structure of superparamagnetic nanoparticle adsorbents for higher and faster removal of emerging organic contaminants and PAHs." Environmental Science: Water Research & Technology 2, no. 3 (2016): 521–28. http://dx.doi.org/10.1039/c6ew00066e.

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Superparamagnetic permanently confined micelle array (Mag-PCMAs) nanoparticle adsorbents have been successfully synthesized with a core/shell structure of a silica/surfactant mesostructured hybrid layer on negatively charged maghemite nanoparticles.

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Lee, Eunkyung, Jiyoung Jung, Ajeong Choi, Xavier Bulliard, Jung-Hwa Kim, Youngjun Yun, Jooyoung Kim, Jeongil Park, Sangyoon Lee, and Youngjong Kang. "Dually crosslinkable SiO2@polysiloxane core–shell nanoparticles for flexible gate dielectric insulators." RSC Advances 7, no. 29 (2017): 17841–47. http://dx.doi.org/10.1039/c6ra28230j.

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A hybrid gate dielectric material for flexible OTFT is developed by using core–shell nanoparticles (SiO₂@PSR_XL) where the core and the shell consist of silica nanoparticles and polysiloxane resin, respectively.

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von der Lühe, Moritz, Ulrike Günther, Andreas Weidner, Christine Gräfe, Joachim H. Clement, Silvio Dutz, and Felix H. Schacher. "SPION@polydehydroalanine hybrid particles." RSC Advances 5, no. 40 (2015): 31920–29. http://dx.doi.org/10.1039/c5ra01737h.

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We report on the coating of superparamagnetic iron oxide nanoparticles using polyanionic or polyzwitterionic materials based on polydehydroalanine. The resulting core–shell hybrid nanoparticles exhibit shells of different charge and thickness.

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Pereira, Rute, Tito Trindade, and Joana Barata. "Magnetite–Corrole Hybrid Nanoparticles." Magnetochemistry 4, no. 3 (August 22, 2018): 37. http://dx.doi.org/10.3390/magnetochemistry4030037.

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This study describes the first example of a hybrid material comprising corrole- and silica-coated magnetite nanoparticles. Firstly, cuboid and spheroid magnetite nanoparticles were prepared using a simple hydrothermal route, followed by a silica coating. The hybrid nanoparticles were obtained by promoting a covalent link between a gallium (III)(pyridine) complex of 5,10,15-tris(pentafluorophenyl)corrole (GaPFC) and the surface of magnetite–silica core/shell nanoparticles (Fe3O4@SiO2), shaped both as cuboids and spheroids. The hybrids were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible spectrophotometry (UV-Vis) and transmission electron microscopy (TEM). Preliminary studies on the capacity of singlet oxygen generation of the hybrid nanoparticles showed that these have lower efficiency values when compared to the pure corrole compound.

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Ribeiro, T., E. Coutinho, A. S. Rodrigues, C. Baleizão, and J. P. S. Farinha. "Hybrid mesoporous silica nanocarriers with thermovalve-regulated controlled release." Nanoscale 9, no. 36 (2017): 13485–94. http://dx.doi.org/10.1039/c7nr03395h.

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Daneshfar, Nader, and Majid Moradi. "An analytical solution for light scattering by metallic cylindrical nanoparticles with core–shell structure." Modern Physics Letters B 30, no. 05 (February 20, 2016): 1650041. http://dx.doi.org/10.1142/s021798491650041x.

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In this paper, the optical scattering from cylindrical plasmonic nanoparticles with a core–shell structure, while the core is dielectric coated by a metallic shell such as gold, is investigated by using an analytical solution in the framework of Mie theory. A closed-form (CF) formalism that determines the optical properties of cylindrical nanoparticles based on the series expansions of Bessel functions for the Mie scattering coefficients is introduced and presented. By using this formulation, we will show the optical response and the surface plasmon resonance of hybrid metal-based nanoparticles with cylindrical shape is dependent on the radius of nanoparticle, the refractive index of core and physical environment of nanoparticle. Also, the influence of interband transitions on the optical scattering by plasmonic nanoparticles is discussed and interpreted using the Drude–Lorentz model because the optical properties of metals arise from both the optical excitation of interband transitions and the free electron response.

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Szczęch, Marta, and Krzysztof Szczepanowicz. "Polymeric Core-Shell Nanoparticles Prepared by Spontaneous Emulsification Solvent Evaporation and Functionalized by the Layer-by-Layer Method." Nanomaterials 10, no. 3 (March 10, 2020): 496. http://dx.doi.org/10.3390/nano10030496.

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The aim of our study was to develop a novel method for the preparation of polymeric core-shell nanoparticles loaded with various actives for biomedical applications. Poly(caprolactone) (PCL), poly(lactic acid) (PLA) and poly(lactide-co-glycolide) (PLGA) nanoparticles were prepared using the spontaneous emulsification solvent evaporation (SESE) method. The model active substance, Coumarin-6, was encapsulated into formed polymeric nanoparticles, then they were modified/functionalized by multilayer shells’ formation. Three types of multilayered shells were formed: two types of polyelectrolyte shell composed of biocompatible and biodegradable polyelectrolytes poly-L-lysine hydrobromide (PLL), fluorescently-labeled poly-L-lysine (PLL-ROD), poly-L-glutamic acid sodium salt (PGA) and pegylated-PGA (PGA-g-PEG), and hybrid shell composed of PLL, PGA, and SPIONs (superparamagnetic iron oxide nanoparticles) were used. Multilayer shells were constructed by the saturation technique of the layer-by-layer (LbL) method. Properties of our polymeric core-shell nanoparticle were optimized for bioimaging, passive and magnetic targeting.

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Wen, Hui Ying, Hai Feng Fang, and Shen Ling Xiao. "Preparation and Characterization of Magnetic Functional Hybrid Particles." Applied Mechanics and Materials 101-102 (September 2011): 918–21. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.918.

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Hybrid microspheres with a polystyrene core coated with magnetite nanoparticles were prepared by two techniques. Firstly, monodispersed functional polystyrene latex particles were prepared by emulsion polymerization. In a general way chemical groups may be introduced through polymerizable surfactant or functional monomer. Magnetite acidic or alkaline sol was added in, then magnetite nanoparticles were absorbed onto latex particles by electrostatic attraction and core-shell composite particles were formed. Secondly, core-shell composite particles were prepared by miniemulsion polymerization. To modify the tendency of conglomeration of magnetite and increase the amount of magnetic particles onto the composite particles, silane coupling agent MPS was used as surface modification agent for magnetite. A series of different size and coating morphology magnetic hybrid particles were prepared through the adjustment of some experiment parameters. The obtained functional core-shell particles were characterized by FTIR, TEM, etc.

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Pustovalov, V. K., and L. G. Astafyeva. "DEPENDENCE OF OPTICAL PROPERTIES OF TWO-LAYERED METAL-DIELECTRIC SPHERICAL NANOPARTICLES ON TEMPERATURE." Journal of Applied Spectroscopy 89, no. 4 (July 20, 2022): 470–76. http://dx.doi.org/10.47612/0514-7506-2022-89-4-470-476.

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The dependences of the efficiency factors of radiation absorption by spherical hybrid nanoparticles of the core-shell system, respectively, with gold-quartz and quartz-gold materials with core radii r0 = 40, 50, 60, 70 nm and shell thicknesses Δr1 = 10, 20, 30 nm in the wavelength range of 300–3000 nm at temperatures of particles and surrounding quartz T = 300, 1173 K are theoretically calculated and studied. Essential change of radiation absorption by a nanoparticle is established with an increase of temperatures of nanoparticles and environment. The change of optical properties of nanoparticles significantly influences the efficiency of energy absorption of solar or optical radiation by nanoparticles, heating temperature of nanoparticles and environment and further thermal processes. The results are interesting for purposes of creation of high-temperature solid nanostructured absorbers of solar radiation containing absorbing radiation of a nanoparticle and also for creation of new materials for high-temperature nanophotonics.

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Kerkhofs, Stef, Frederic Leroux, Lionel Allouche, Randy Mellaerts, Jasper Jammaer, Alexander Aerts, Christine E. A. Kirschhock, et al. "Single-step alcohol-free synthesis of core–shell nanoparticles of β-casein micelles and silica." RSC Adv. 4, no. 49 (2014): 25650–57. http://dx.doi.org/10.1039/c4ra03252g.

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Bontempi, Nicolò, Emanuele Cavaliere, Valentina Cappello, Pasqualantonio Pingue, and Luca Gavioli. "Ag@TiO2 nanogranular films by gas phase synthesis as hybrid SERS platforms." Physical Chemistry Chemical Physics 21, no. 45 (2019): 25090–97. http://dx.doi.org/10.1039/c9cp03998h.

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The synthesis of hybrid metallic-dielectric substrates as reliable SERS platforms relies on core–shell nanoparticles, obtained by supersonic beam deposition cluster technique, with an outer dielectric shell composed of TiO₂ and an inner core of Ag.

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Lopes Dias, Marcos, Marcos A. S. Pedroso, C. Cheila G. Mothé, and Chiaki Azuma. "Core Shell Silica-Silicon Hybrid Nanoparticles: Synthesis and Characterization." Journal of Metastable and Nanocrystalline Materials 22 (August 2004): 83–90. http://dx.doi.org/10.4028/www.scientific.net/jmnm.22.83.

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Voronina, N. V., I. B. Meshkov, V. D. Myakushev, N. V. Demchenko, T. V. Laptinskaya, and A. M. Muzafarov. "Inorganic core/organic shell hybrid nanoparticles: Synthesis and characterization." Nanotechnologies in Russia 3, no. 5-6 (June 2008): 321–29. http://dx.doi.org/10.1134/s1995078008050078.

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Zelepukin, I. V., V. O. Shipunova, A. B. Mirkasymov, P. I. Nikitin, M. P. Nikitin, and S. M. Deyev. "Synthesis and Characterization of Hybrid Core-Shell Fe3O4/SiO2 Nanoparticles for Biomedical Applications." Acta Naturae 9, no. 4 (December 15, 2017): 58–65. http://dx.doi.org/10.32607/20758251-2017-9-4-58-65.

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The creation of markers that provide both visual and quantitative information is of considerable importance for the mapping of tissue macrophages and other cells. We synthesized magnetic and magneto-fluorescent nanomarkers for the labeling of cells which can be detected with high sensitivity by the magnetic particle quantification (MPQ) technique. For stabilization under physiological conditions, the markers were coated with a dense silica shell. In this case, the size and zeta-potential of nanoparticles were controlled by a modified Stober reaction. Also, we developed a novel facile two-step synthesis of carboxylic acid-functionalized magnetic SiO2 nanoparticles, with a carboxyl polymer shell forming on the nanoparticles before the initiation of the Stober reaction. We extensively characterized the nanomarkers by transmission electron microscopy, electron microdiffraction, and dynamic and electrophoretic light scattering. We also studied the nanoparticle cellular uptake by various eukaryotic cell lines.

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Liu, Fulei, Xiaoxian Huang, Lingfei Han, Mangmang Sang, Lejian Hu, Bowen Liu, Bingjing Duan, et al. "Improved druggability of gambogic acid using core–shell nanoparticles." Biomaterials Science 7, no. 3 (2019): 1028–42. http://dx.doi.org/10.1039/c8bm01154k.

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Xia, Jia, Xia Luo, Jin Huang, Jiajun Ma, and Junxiao Yang. "Preparation of core/shell organic–inorganic hybrid polymer nanoparticles and their application to toughening poly(methyl methacrylate)." RSC Advances 11, no. 54 (2021): 34036–47. http://dx.doi.org/10.1039/d1ra03880j.

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Khatami, Mehrdad, Hajar Alijani, Meysam Nejad, and Rajender Varma. "Core@shell Nanoparticles: Greener Synthesis Using Natural Plant Products." Applied Sciences 8, no. 3 (March 10, 2018): 411. http://dx.doi.org/10.3390/app8030411.

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Among an array of hybrid nanoparticles, core-shell nanoparticles comprise of two or more materials, such as metals and biomolecules, wherein one of them forms the core at the center, while the other material/materials that were located around the central core develops a shell. Core-shell nanostructures are useful entities with high thermal and chemical stability, lower toxicity, greater solubility, and higher permeability to specific target cells. Plant or natural products-mediated synthesis of nanostructures refers to the use of plants or its extracts for the synthesis of nanostructures, an emerging field of sustainable nanotechnology. Various physiochemical and greener methods have been advanced for the synthesis of nanostructures, in contrast to conventional approaches that require the use of synthetic compounds for the assembly of nanostructures. Although several biological resources have been exploited for the synthesis of core-shell nanoparticles, but plant-based materials appear to be the ideal candidates for large-scale green synthesis of core-shell nanoparticles. This review summarizes the known strategies for the greener production of core-shell nanoparticles using plants extract or their derivatives and highlights their salient attributes, such as low costs, the lack of dependence on the use of any toxic materials, and the environmental friendliness for the sustainable assembly of stabile nanostructures.

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Xu, Xia, Yan Long, Pengpeng Lei, Lile Dong, Kaimin Du, Jing Feng, and Hongjie Zhang. "A pH-responsive assembly based on upconversion nanocrystals and ultrasmall nickel nanoparticles." Journal of Materials Chemistry C 5, no. 37 (2017): 9666–72. http://dx.doi.org/10.1039/c7tc02665j.

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A hybrid assembly based on NaYF₄:Yb³⁺,Er³⁺/Tm³⁺@NaYF₄(core@shell) upconversion nanocrystals and ultrasmall Ni nanoparticles (abbreviated as core@shell@Ni) for rapid response towards pH in different PBS solutions.

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Wang, Jianying, Kai Song, Lei Wang, Yijing Liu, Ben Liu, Jintao Zhu, Xiaolin Xie, and Zhihong Nie. "Formation of hybrid core–shell microgels induced by autonomous unidirectional migration of nanoparticles." Materials Horizons 3, no. 1 (2016): 78–82. http://dx.doi.org/10.1039/c5mh00024f.

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A facile and unconventional strategy has been developed for the fabrication of inorganic nanoparticles (NPs)-loaded hybrid core–shell microgels. The formation of core–shell microgels constitutes a novel mechanism in which the ionic crosslinking of charged polymers (e.g., alginate) drives the unidirectional migration of NPs towards the center of droplets.

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Yu, Wei, Nikunjkumar Visaveliya, Christophe A. Serra, J. Michael Köhler, Shukai Ding, Michel Bouquey, René Muller, Marc Schmutz, and Isabelle Kraus. "Preparation and Deep Characterization of Composite/Hybrid Multi-Scale and Multi-Domain Polymeric Microparticles." Materials 12, no. 23 (November 27, 2019): 3921. http://dx.doi.org/10.3390/ma12233921.

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Polymeric microparticles were produced following a three-step procedure involving (i) the production of an aqueous nanoemulsion of tri and monofunctional acrylate-based monomers droplets by an elongational-flow microemulsifier, (ii) the production of a nanosuspension upon the continuous-flow UV-initiated miniemulsion polymerization of the above nanoemulsion and (iii) the production of core-shell polymeric microparticles by means of a microfluidic capillaries-based double droplets generator; the core phase was composed of the above nanosuspension admixed with a water-soluble monomer and gold salt, the shell phase comprised a trifunctional monomer, diethylene glycol and a silver salt; both phases were photopolymerized on-the-fly upon droplet formation. Resulting microparticles were extensively analyzed by energy dispersive X-rays spectrometry and scanning electron microscopy to reveal the core-shell morphology, the presence of silver nanoparticles in the shell, organic nanoparticles in the core but failed to reveal the presence of the gold nanoparticles in the core presumably due to their too small size (c.a. 2.5 nm). Nevertheless, the reddish appearance of the as such prepared polymer microparticles emphasized that this three-step procedure allowed the easy elaboration of composite/hybrid multi-scale and multi-domain polymeric microparticles.

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Spadaro, Donatella, Maria A. Iatì, Maria G. Donato, Pietro G. Gucciardi, Rosalba Saija, Anurag R. Cherlakola, Stefano Scaramuzza, Vincenzo Amendola, and Onofrio M. Maragò. "Scaling of optical forces on Au–PEG core–shell nanoparticles." RSC Advances 5, no. 113 (2015): 93139–46. http://dx.doi.org/10.1039/c5ra20922f.

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Kim, Seokho, Bo-Hyun Kim, Young Ki Hong, Chunzhi Cui, Jinho Choi, Dong Hyuk Park, and Sung Ho Song. "In Situ Enhanced Raman and Photoluminescence of Bio-Hybrid Ag/Polymer Nanoparticles by Localized Surface Plasmon for Highly Sensitive DNA Sensors." Polymers 12, no. 3 (March 10, 2020): 631. http://dx.doi.org/10.3390/polym12030631.

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We experimentally demonstrate the simultaneous enhancement of Raman and photoluminescence (PL) of core-shell hybrid nanoparticles consisting of Ag (core) and polydiacetylene (PDA, shell) through the assistance of localized surface plasmon (LSP) effect for the effective biosensor. Core-shell nanoparticles (NPs) are fabricated in deionized water through a sequential process of reprecipitation and self-assembly. The Raman signal of PDA on core-shell NPs is enhanced more than 100 times. Also, highly enhanced photoluminescence is observed on Ag/PDA hybrid NPs after coupling of the complementary t-DNA with p-DNA which are immobilized on PDA shell. This indicates that the core Ag affects the Raman and PL of PDA through the LSP resonance, which can be caused by the energy and/or charge transfer caused by the LSP coupling and the strong electromagnetic field near Ag NP surface. Only electrons present on the surface interact with the PDA shell, not involving the electrically neutral part of the electrons inside the Ag NP. Furthermore, this work shows that as prepared Ag/PDA NPs functionalized by probe DNA can sense the target DNA with an attomolar concentration (100 attomole).

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Pappas, George S., Chaoying Wan, Chris Bowen, David M. Haddleton, and Xiaobin Huang. "Functionalization of BaTiO3 nanoparticles with electron insulating and conducting organophosphazene-based hybrid materials." RSC Advances 7, no. 32 (2017): 19674–83. http://dx.doi.org/10.1039/c7ra02186k.

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Wang, Yanxia, Heng Yang, Si Chen, Hua Chen, and Zhihua Chai. "Fabrication of Hybrid Polymeric Micelles Containing AuNPs and Metalloporphyrin in the Core." Polymers 11, no. 3 (February 27, 2019): 390. http://dx.doi.org/10.3390/polym11030390.

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Multi-structure assemblies consisting of gold nanoparticles and porphyrin were fabricated by using diblock copolymer, poly(ethylene glycol)-block-poly(4-vinylpyridine) (PEG-b-P4VP). The copolymer of PEG-b-P4VP was used in the formation of core-shell micelles in water, in which the P4VP block serves as the core, while the PEG block forms the shell. In the micellar core, gold nanoparticle and metalloporphyrin were dispersed through the axial coordination. Structural and morphological characterizations of the complex micelle were carried out by transmission electron microscopy, laser light scatting, and UV-visible spectroscopy. Metalloporphyrin in the complex micelle exhibited excellent photostability by reducing the generation of the singlet oxygen. This strategy may provide a novel approach to design photocatalysts that have target applications in photocatalysis and solar cells.

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Jiang, Lai, Hiang Wee Lee, and Say Chye Joachim Loo. "Therapeutic lipid-coated hybrid nanoparticles against bacterial infections." RSC Advances 10, no. 14 (2020): 8497–517. http://dx.doi.org/10.1039/c9ra10921h.

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Lipid-coated hybrid nanoparticles are next-generation core–shell structured nanodelivery systems, which improve the loading capabilities of therapeutics and can improve therapeutic delivery, especially for targeting biofilm-based and intracellular bacterial infections.

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Wong, John E., Akhilesh K. Gaharwar, Detlef Müller-Schulte, Dhirendra Bahadur, and Walter Richtering. "Magnetic Nanoparticle–Polyelectrolyte Interaction: A Layered Approach for Biomedical Applications." Journal of Nanoscience and Nanotechnology 8, no. 8 (August 1, 2008): 4033–40. http://dx.doi.org/10.1166/jnn.2008.an02.

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This study describes the surface modification of magnetic nanoparticles using two different approaches. The first approach consists of an in situ modification of the surface during the precipitation of the magnetic nanoparticles while the second approach consists of a post-modification of the surface after the formation of the magnetic nanoparticles. In the latter case, we adopted the Layer-by-Layer assembly of polyelectrolyte multilayers of poly(diallyl-dimethylammonium) chloride and poly(styrenesulfonate) to build a polymeric shell around the magnetic nanoparticle core, thereby intentionally conferring to this hybrid core–shell the same charge as the charge of the polyelectrolyte deposited in the last layer. Electrophoretic measurements reveal charge reversal indicating successful Layer-by-Layer deposition while magnetization studies show that the superparamagnetic behavior is not much affected by the presence of polyelectrolytes on the modified magnetic nanoparticles. Fourier transform infrared and thermogravimetry analysis results underline that the various polyelectrolytes employed, in both the methodologies adopted, were successfully bound to the nanoparticles.

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Saykova, Diana, Svetlana Saikova, Yuri Mikhlin, Marina Panteleeva, Ruslan Ivantsov, and Elena Belova. "Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe2O4@Au." Metals 10, no. 8 (August 10, 2020): 1075. http://dx.doi.org/10.3390/met10081075.

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In this study, NiFe2O4@Au core–shell nanoparticles were prepared by the direct reduction of gold on the magnetic surface using amino acid methionine as a reducer and a stabilizing agent simultaneously. The obtained nanoparticles after three steps of gold deposition had an average size of about 120 nm. The analysis of particles was performed by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis spectroscopy techniques. The results indicate successful synthesis of core–shell particles with the magnetic core, which consists of a few agglomerated nickel ferrite crystals with an average size 25.2 ± 2.0 nm, and the thick gold shell consists of fused Au0 nanoparticles (NPs). Magnetic properties of the obtained nanoparticles were examined with magnetic circular dichroism. It was shown that the magnetic behavior of NiFe2O4@Au NPs is typical for superparamagnetic NPs and corresponds to that for NiFe2O4 NPs without a gold shell. The results indicate the successful synthesis of core–shell particles with the magnetic nickel ferrite core and thick gold shell, and open the potential for the application of the investigated hybrid nanoparticles in hyperthermia, targeted drug delivery, magnetic resonance imaging, or cell separation. The developed synthesis strategy can be extended to other metal ferrites and iron oxides.

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Zhang, Ranran, Risheng Yao, Binbin Ding, Yuxin Shen, Shengwen Shui, Lei Wang, Yu Li, Xianzhu Yang, and Wei Tao. "Fabrication of Upconverting Hybrid Nanoparticles for Near-Infrared Light Triggered Drug Release." Advances in Materials Science and Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/169210.

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Low tissue penetration and harmful effects of (ultraviolet) UV or visible light on normal tissue limit exploiting nanocarriers for the application of light-controlled drug release. Two strategies may solve the problem: one is to improve the sensitivity of the nanocarriers to light to decrease the radiation time; the other one is using more friendly light as the trigger. In this work, we fabricated a core-shell hybrid nanoparticle with an upconverting nanoparticle (UCNP) as the core and thermo- and light-responsive block copolymers as the shell to combine the two strategies together. The results indicated that the sensitivity of the block copolymer to light could be enhanced by decreasing the photolabile moieties in the polymer, and the UCNP could transfer near-infrared (NIR) light, which is more friendly to tissue and cell, to UV light to trigger the phase conversion of the block polymersin situ. Using Nile Red (NR) as the model drug, the hybrid nanoparticles were further proved to be able to act as carriers with the character of NIR triggered drug release.

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Liu, A., L. Yang, M. Verwegen, D. Reardon, and J. J. L. M. Cornelissen. "Construction of core-shell hybrid nanoparticles templated by virus-like particles." RSC Advances 7, no. 89 (2017): 56328–34. http://dx.doi.org/10.1039/c7ra11310b.

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HWANG, TAEJIN, HEUNGYEOL LEE, HOHYEONG KIM, GYUNTAK KIM, and GYEONGJIN MUN. "ENHANCEMENT OF ELECTROCHROMIC DURABILITY OF A FILM MADE OF SILICA-POLYANILINE CORE-SHELL NANOPARTICLES." Surface Review and Letters 17, no. 01 (February 2010): 39–44. http://dx.doi.org/10.1142/s0218625x10013722.

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Enhancing the operation life time or the electrochemical durability is one of the key issues in electrochromic material studies. It is generally accepted that the inorganic–organic hybrid structure is one of the effective ways to enhance the chemical stability of the material. In this study, an electrochromic film made of silica-polyaniline core-shell composite nanoparticles was tested. The composite particles were prepared through a chemical dispersion polymerization of aniline in an aqueous colloidal solution of silica. The synthesized particles were then dispersed into ethanol and the solution was deposited onto an Indium Tin Oxide (ITO)-coated glass substrate. The electrochromic characterization on the prepared films was performed using the cyclovoltammetry and the optical response to a switching potential. The results showed that the inorganic–organic core-shell hybrid nanoparticle could be a promising choice for the enhancement of electrochromic durability.

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Li, Joshua Qing Song, Hai Wang, and Yan Qiu Wang. "Preparation of Silica/Polymer Hybrid Nanoparticles via a Semi-Continuous Soup-Free Emulsion Polymerization." Advanced Materials Research 1120-1121 (July 2015): 233–42. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.233.

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Hybrid nanoparticles were prepared by direct polymerization of methyl methacrylate, vinyl acetate, and styrene monomers onto the unmodified hydrophilic surfaces of 33 nm silica nanoparticles in a semi-continuous soap-free emulsion polymerization at a monomer starved condition. The polymerization was initiated by potassium persulfate with constant monomer feed at 0.01, 0.02, or 0.04 mL/min. The growth of the core-shell nanoparticles were measured by a laser particle size analyzer. FT-IR spectra analysis confirmed the hybrid structures of the synthesized nanoparticles. SEM images and size exclusion chromatography (SEC) results indicated regular core-shell microsphere structures. The hybrid nanoparticles increased in monodispersity and size over 100 nm with the reaction. However, SiO2/polystyrene (PS) nanoparticles grew much faster compared with SiO2/polymethyl methacrylate (PMMA) and SiO2/polyvinyl acetate (PVAC). There was particle coagulation, about 12 SiO2/PS particles aggregating to one, in the early stage of the seeded process. In addition, PS secondary particles were formed before the particle coagulation, and then merged with the SiO2/PS nanoparticles in the particle coagulation. The formation of SiO2/polymer hybrid nanoparticles depended on the hydrophilic characteristics of the polymer, and the size of silica seeds.

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Khadam, Mohsin, Habib Ullah, Saif Ullah, M. Athar Faheem Riaz, and Hamza Khan Lodhi. "Polymer Stabilized Metal Nanoparticles for Catalytic Degradation of Methylene Blue in Water." International Journal of Economic and Environmental Geology 13, no. 3 (June 24, 2022): 15–21. http://dx.doi.org/10.46660/ijeeg.v13i3.38.

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Methylene blue is highly toxic and releases from various industries. It must be transformed into less toxic compounds. The Core-Shell microgels p (Pst core), Pstcore-NIPMamm-MAa and Ag in Pst-p NIPMamm-MAa have been synthesized using the Core-Shell hybrid micro gelling NIPMamm-MAa emulsion polymerization process. The 0.086mM, MB 6.2mM NaBH4 and 0.2916 mg / mL catalysts in the cuvette were measured using UV-visible spectrophotometers. Spectrums were measured at a one-minute interval. The peak at 600 nm steadily decreased over time and was completely eliminated after 11 minutes. Without the catalyst, MB decreases with NaBH4 which showed that the reaction decreases were slow and MB very high within 120 minutes. The Psty core of FT-IR core microgels, pNIpmam-MMAA, and Ag-pNIpmam-MAA core microgels are hybrids. At 2955 and 2845 cm−1 FT-IR spectra, Psty NiPMaM – MaA and Ag-p NiPMaM – MaA were used for core shell microgels, with C-H vibrations expanding the aromatic ring. In this study degradation of Methylene were carried out with Ag- Nanocomposites at different interval of time to check the degradation at minimum time. The degradation of MB dye

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Kobayashi, Yoichi, Yoshiyuki Nonoguchi, Li Wang, Tsuyoshi Kawai, and Naoto Tamai. "Dual Transient Bleaching of Au/PbS Hybrid Core/Shell Nanoparticles." Journal of Physical Chemistry Letters 3, no. 9 (April 12, 2012): 1111–16. http://dx.doi.org/10.1021/jz300248p.

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Pacaud, Benjamin, Loïc Leclercq, Jean-François Dechézelles, and Véronique Nardello-Rataj. "Hybrid Core-Shell Nanoparticles by “Plug and Play” Self-Assembly." Chemistry - A European Journal 24, no. 67 (October 31, 2018): 17672–76. http://dx.doi.org/10.1002/chem.201804155.

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Capek, Ignác. "Noble Metal Nanoparticles and Their (Bio) Conjugates. II. Preparation." International Journal of Chemistry 8, no. 1 (January 6, 2016): 86. http://dx.doi.org/10.5539/ijc.v8n1p86.

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Hybrid nanoparticles of gold and silver can not only retain the beneficial features of both nanomaterials, but also possess unique advantages (synergism) over the other two types. Novel pseudospherical and anisotropic nanoparticles, bimetallic triangular nanoparticles, and core@shell nanoparticles were prepared by the different procedures for various applications and understanding both the particle evolution (nucleation) and nanoparticle anisotropy. Hybrid nanoparticles of gold and silver are considered to be low in toxicity, and exhibit facile surface functionalization chemistry. Furthermore, their absorption peaks are located in visible and near-infrared region. These nanoparticles provide significant plasmon tunability, chemical and surface modification properties, and significant advances in the growth into anisotropic nanostructures. The photoinduced synthesis can be used to prepare various (sub) nanoparticles and OD and 1D nanoparticles. Ostwald and digestive ripening provided narrower particle size distribution.

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Hahn, Braden. "78511 Synthesis of Novel Core/Shell Polymeric Nanoparticles for Controlled Drug Release." Journal of Clinical and Translational Science 5, s1 (March 2021): 100. http://dx.doi.org/10.1017/cts.2021.657.

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ABSTRACT IMPACT: This work will develop a novel drug delivery system that has improved biocompatibility and controlled release than current systems and allow for customizable loading and drug delivery to unique patient and treatment requirements. OBJECTIVES/GOALS: The goal of my project is a novel hybrid core/shell nanoparticle system for controlling in vivo chemotherapeutic concentration. The current goal is to confirm core and shell polymeric nanoparticle formation via emulsion technique and validate predictive model developed to optimize shell formation efficiency and control shell thickness. METHODS/STUDY POPULATION: Though early results are promising, they are not proof that the desired core/shell structure is being formed via my novel process. I constructed a theoretical model to use to optimize and control the process for precise shell thicknesses. Therefore, the current experimental plan focus is to not only visually confirm the predicted formation of my core/shell design but use these experiments to validate the model. 1.Gel-Suspended SEM: nanoparticles suspended in gel matrix, bisected to reveal inner structure2.Fluorescent Conjugation Microscopy: visually-distinct dyes used to show polymer distribution and validated against the theoretical model predictions.3.Modified Hydrophobic Dye Release: different mixtures of polymers with release showing if previous promising results due to core/shell structure RESULTS/ANTICIPATED RESULTS: As stated, the experiments will confirm the core/shell nanoparticle structure, validate the developed theoretical model, or provide direct evidence against any formation. This core/shell structure is key to the current design for controlling payload release rate and thus in vivo drug concentration. For the gel-suspension experiment, the interior core will be labeled with ultrasmall SPIONs and thus any layers within the particles will be distinct. While this result is qualitative, high magnification fluorescent microscope images will be analyzed using image processing software to determine core/shell formation efficiency and compared to estimated efficiencies from the model. Finally, the mixed release will clarify previous experiments’ release mechanism and either support or disprove shell influence. DISCUSSION/SIGNIFICANCE OF FINDINGS: The significance of this work is twofold: core/shell particles have been proven to provide variable control of release on the micron scale but not yet at the nanoscale, allowing for a circulating, targeted system that can finely control release. The process is also novel for producing this type of structure, at highly consistent quality and size.

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Gu, Haoshuai, Hui Zhang, Xinyue Zhang, Yani Guo, Limeng Yang, Hailiang Wu, and Ningtao Mao. "Photocatalytic Properties of Core-Shell Structured Wool-TiO2 Hybrid Composite Powders." Catalysts 11, no. 1 (December 24, 2020): 12. http://dx.doi.org/10.3390/catal11010012.

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In this study, a special core–shell structured wool-TiO2 (WT) hybrid composite powder also having TiO2 nanoparticles incorporated inside cortical cells was reported. The wool pallets were pulverized from wool fibers using vibration-assisted ball milling technique and the WT powders having mesopores and macropores were produced in hydrothermal process. Experimental results indicated that the infiltrated TiO2 nanoparticles were amorphous structure, while the coated TiO2 nanoparticles were anatase phase structure. The crystallized TiO2 nanoparticles were grafted with wool pallets by the N−Ti4+/S−Ti4+/O−Ti4+ bonds. The BET surface area was measured as 153.5 m2/g and the particle sizes were in the 600–3600 nm and 4000–6500 nm ranges. The main reactive radical species of the WT powders were holes, and •O2−, 1O2, and •OH were also involved in the photodegradation of MB dye under visible light irradiation. The experimental parameters for photodegradation of MB dye solution were optimized as follows: 0.25 g/L of WT powders was added in 40 mL of 3 mg/L MB dye solution containing 50 mL/L H2O2, which resulted in the increases of COD value of degraded MB dye solution up to 916.9 mg/L at 120 min. The WT powders could be used for repeatedly photodegradation of both anionic and cationic dyes.

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El-Habashy, Salma E., Amal H. El-Kamel, Marwa M. Essawy, Elsayeda-Zeinab A. Abdelfattah, and Hoda M. Eltaher. "Engineering 3D-printed core–shell hydrogel scaffolds reinforced with hybrid hydroxyapatite/polycaprolactone nanoparticles for in vivo bone regeneration." Biomaterials Science 9, no. 11 (2021): 4019–39. http://dx.doi.org/10.1039/d1bm00062d.

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3D-printed biphasic core/shell hydrogel scaffolds with hybrid bioactive nanoparticles reinforcing core phase possessed controlled swelling, mechanical stiffness and dual-ranged pore size. They provided prominent osteoconductivity, biocompatibility and in-vivo osteogenicity.

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Zhou, Jing, Jie Hu, Mu Li, Hui Li, Weiyu Wang, Yuzi Liu, Randall E. Winans, Tao Li, Tianbo Liu, and Panchao Yin. "Hydrogen bonding directed co-assembly of polyoxometalates and polymers to core–shell nanoparticles." Materials Chemistry Frontiers 2, no. 11 (2018): 2070–75. http://dx.doi.org/10.1039/c8qm00291f.

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Zhang, Ruirui, Shuang Wei, Leihou Shao, Lili Tong, and Yan Wu. "Imaging Intracellular Drug/siRNA Co-Delivery by Self-Assembly Cross-Linked Polyethylenimine with Fluorescent Core-Shell Silica Nanoparticles." Polymers 14, no. 9 (April 28, 2022): 1813. http://dx.doi.org/10.3390/polym14091813.

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Multifunctional theranostic nanomaterial represents one type of emerging agent with the potential to offer both sensitive diagnosis and effective therapy. Herein, we report a novel drug/siRNA co-delivery nanocarrier, which is based on fluorescent mesoporous core-shell silica nanoparticles coated by cross-linked polyethylenimine. The fluorescent mesoporous core-shell silica nanoparticles can provide numerous pores for drug loading and negative charged surface to assemble cross-linked polyethylenimine via electrostatic interaction. Disulfide cross-linked polyethylenimine can be absorbed on the surface of silica nanoparticles which provide the feasibility to bind with negatively charged siRNA and release drug “on-demand”. In addition, the hybrid nanoparticles can be easily internalized into cells to realize drug/siRNA co-delivery and therapeutic effect imaging. This work would stimulate interest in the use of self-assembled cross-linked polyethylenimine with fluorescent mesoporous core-shell silica nanoparticles to construct multifunctional nanocomposites for tumor therapy.

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Bajpai, Ankur, and Stéphane Carlotti. "The Effect of Hybridized Carbon Nanotubes, Silica Nanoparticles, and Core-Shell Rubber on Tensile, Fracture Mechanics and Electrical Properties of Epoxy Nanocomposites." Nanomaterials 9, no. 7 (July 23, 2019): 1057. http://dx.doi.org/10.3390/nano9071057.

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The paper investigates the effect of adding a combination of rigid nanoparticles and core-shell rubber nanoparticles on the tensile, fracture mechanics, electrical and thermo-mechanical properties of epoxy resins. SiO2 nanoparticles, multi-walled carbon nanotubes (MWCNT’s), as rigid nanofillers, and core-shell rubber (CSR) nanoparticles, as soft nanofillers were used with bisphenol-A-based epoxy resin. Further, the rigid fillers were added systematically with core-shell rubber nanoparticles to investigate the commingled effect of rigid nanofillers and soft CSR nanoparticles. The resulting matrix will be broadly evaluated by standard methods to quantify tensile, fracture mechanics, electrical, and thermal properties. The results show that the electrical conductivity threshold is obtained at 0.075 wt. % for MWCNT-modified systems. For hybrid systems, the maximum increase of fracture toughness (218%) and fracture energy (900%) was obtained for a system containing 5 wt. % of CSR and 10 wt. % of SiO2. The analysis of the fracture surfaces revealed the information about existing toughening micro-mechanisms in the nanocomposites.

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Mikoliunaite, Lina, Evaldas Stankevičius, Sonata Adomavičiūtė-Grabusovė, Vita Petrikaitė, Romualdas Trusovas, Martynas Talaikis, Martynas Skapas, et al. "Magneto-Plasmonic Nanoparticles Generated by Laser Ablation of Layered Fe/Au and Fe/Au/Fe Composite Films for SERS Application." Coatings 13, no. 9 (August 30, 2023): 1523. http://dx.doi.org/10.3390/coatings13091523.

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Magneto-plasmonic nanoparticles were fabricated using a 1064 nm picosecond-pulsed laser for ablation of Fe/Au and Fe/Au/Fe composite thin films in acetone. Nanoparticles were characterized by electron microscopy, ultraviolet-visible (UV-VIS) absorption, and Raman spectroscopy. Hybrid nanoparticles were arranged on an aluminum substrate by a magnetic field for application in surface-enhanced Raman spectroscopy (SERS). Transmission electron microscopy and energy dispersive spectroscopy analysis revealed the spherical core-shell (Au-Fe) structure of nanoparticles. Raman spectroscopy of bare magneto-plasmonic nanoparticles confirmed the presence of magnetite (Fe3O4) without any impurities from maghemite or hematite. In addition, resonantly enhanced carbon-based bands were detected in Raman spectra. Plasmonic properties of hybrid nanoparticles were probed by SERS using the adsorbed biomolecule adenine. Based on analysis of experimental spectra and density functional theory modeling, the difference in SERS spectra of adsorbed adenine on laser-ablated Au and magneto-plasmonic nanoparticles was explained by the binding of adenine to the Fe3O4 structure at hybrid nanoparticles. The hybrid nanoparticles are free from organic stabilizers, and because of the biocompatibility of the magnetic shell and SERS activity of the plasmonic gold core, they can be widely applied in the construction of biosensors and biomedicine applications.

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Hou, Guoling, Lei Zhu, Daoyong Chen, and Ming Jiang. "Core−Shell Reversion of Hybrid Polymeric Micelles Containing Gold Nanoparticles in the Core." Macromolecules 40, no. 6 (March 2007): 2134–40. http://dx.doi.org/10.1021/ma062373b.

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Journal articles on the topic 'Hybrid Core-Shell Nanoparticles'

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