And all the above characterizations show that in this sample there are no iron oxides inside the particle. ![]() Core-shell palladium-titanium dioxide NPs, PdTiO, were prepared using. NOVEL COPPER LOADED CORE-SHELL SILICA NANOPARTICLES WITH IMPROVED COPPER BIOAVAILABILITY: SYNTHESIS, CHARACTERIZATION AND STUDY OF ANTIBACTERIAL PROPERTIES by PAVITHRA MANIPRASAD B.Tech. The Au-coated particles exhibit a surface plasmon resonance peak that red-shifts from 520 to 680 nm. Titanium dioxide nanoparticles (NPs) and iridium(III) complexes have been. His scientific inter- ests involve the synthesis of semiconductor nanocrystals and magnetic nanoparticles, their applications in biological labeling. SQUID magnetometry reveals that particle magnetic properties are not significantly affected by the overlayer of a moderately thick Au shell. This masters thesis details the synthesis of a dual core/shell contrast for imaging in both modes, created by using a core of iron oxide and a outer shell. HRTEM images show clear core–shell structure with different crystal lattices from Fe and Au. ![]() Their growing applications in catalysis, medicine and protection of the environment make them highly interesting for further characteriza- tion. From functionality perspective, core-shell nanoparticles has taken a special place. In this work, a combination of TEM ( transmission electron microscopy), XRD (X-ray powder diffractometry), EDS (energy disperse X-ray spectroscopy), SQUID ( superconducting quantum interference device), TGA (thermograviometric analysis) and UV–visible absorption spectroscopy were employed to characterize the morphology, structure, composition and magnetic properties of the products. Magnetic iron oxide core-shell nanoparticles, coated with a protective silica layer have been proven to be successful as adsorbents for water purification and hydromet- allurgy of rare earth elements. Finally, the research focuses on facile approaches to engineer the transition of the temperature-sensitive particles and develop composite core-shell nanoparticles with a metallic shell.Au-coated magnetic Fe nanoparticles have been successfully synthesized by partial replacement reaction in a polar aprotic solvent with about 11 nm core of Fe and about 2.5 nm shell of Au. The core-shell particle also was characterized by. The overall size and shell thickness can be controlled by varying the reactant concentration both the core and shell material. The core surface was modified with CTAB miceller solution to make the coating favorable. Synthesis of the core-shell Cu-silica nanoparticle (C-S CuSiNP) involves preparation of base-hydrolyzed Stber silica seed particles first, followed by the acid-catalyzed seeded growth of the Cu-silica shell layer around the core. Similarly, by incorporating poly-2-(N,N)-dimethylamino)ethyl methacrylate (PDMA) into the core, pH sensitive core-shell composite nanoparticles were synthesized and applied as effective carriers to release a rheological modifier upon a pH change. The core shell particles were confirmed by DLS measurement and UV spectroscopy. The Stber silica shell has been engineered to accommodate copper. The composite nanoparticles were temperature sensitive and could be up-taken by human prostate cancer cells and demonstrated effectiveness in drug delivery and cancer therapy. In the realm of catalysis, small nanoparticles have been an area of interest due to their high surface-to-volume ratio. More importantly, Pickering emulsion polymerization was employed to synthesize polystyrene/poly(N-isopropylacrylamide) (PNIPAAm)-silica core-shell nanoparticles with N-isopropylacrylamide incorporated into the core as a co-monomer. The silica nanoparticles were thermodynamically favorable to self-assemble at liquid-liquid interfaces at the initial stage of polymerization and remained at the interface to finally form the shells of the composite particles. Possible mechanisms of the Pickering emulsion polymerization were also explored. This thesis focuses on the synthesis and. The one-step Pickering emulsion polymerization method was successfully developed and applied to synthesize polystyrene-silica core-shell composite particles. Carbon nanoparticles constitute a class of important materials that have uses in many different fields. This is an interesting class of supramolecular building blocks and can "exhibit unusual, possibly unique, properties which cannot be obtained simply by co-mixing polymer and inorganic particles". This dissertation focuses on the study of core-shell type of nanoparticles where a polymer serves as the core and inorganic nanoparticles are the shell. ![]() Among them, core-shell composite nanoparticles are an important class of materials which are attractive for their applications in catalysis, sensing, electromagnetic shielding, drug delivery, and environmental remediation. Nanoparticles are ubiquitous in various fields due to their unique properties not seen in similar bulk materials.
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