Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 152 for “"Nanoparticles (NPs)"”.
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Effects of Multi-walled Carbon Nanotubes (MWCNTs) and Integrated MWCNTs/SiO2 Additives on Polymeric PVDF Membrane for Membrane Distillation
… nanotubes (MWCNTs) and integrated MWCNTs/ SiO2 nanoparticles (NPs) were loaded as additives into nanocomposite polyvinylidene fluoride (PVDF) membranes fabricated via phase inversion methods, and the effects of these additives on the structure and vacuum membrane distillation (VMD) performance …
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Bio-Inspired Assembly of Nanomaterials for Applications on Nanoelectronics and Biosensors
… is that every nanomaterial, such as metallic nanoparticles (NPs), quantum dots (QDs), carbon nanotubes (CNTs), and magnetic nanoparticles has unique physical and chemical properties that can be used for various applications. For practical use of nanomaterials in various applications, however, …
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Development of Nanoprobes for the Biological Imaging Using Positive Charged Quantum Dots and Upconversion Nanoparticles
Nanoparticles (NPs) have unique physicochemical properties due to the quantum confinement effect. Semiconductor quantum dots (QDs) or upconversion nanoparticles (UCNPs) exhibit interesting properties such as high photoluminescence, photostability, dual magnetic/optical modality. In this study, …
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Interaction of amphiphilic gold nanoparticles with lipid membranes and their application to cancer radiotherapy
Striped gold nanoparticles (NPs), inorganic particles protected by an amphiphilic mixed organic ligand shell, are the most recent and potent evolution of gold nanoparticle intracellular delivery vectors. Here we propose the combination of striped gold nanoparticles with lipid vesicles of diameter < …
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Nanoscale examinations on the sequestration of Cu by organic material in contaminated surface soils in Timmins, Ontario
… as incidental metallic Cu and covellite (CuS) nanoparticles (NPs), formed via ion reduction by humic substances and magnetite. Additionally, TEM analysis of the colloidal fraction, extracted via ultracentrifugation from the surface soil layer, indicates the occurrence of incidental covellite …
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THE BIO-MOLECULAR ANALYSIS OF TITANIUM DIOXIDE NANOPARTICLES EXPOSURE ON CARDIOMYOCYTES
… has raised the need to address the safety of nanoparticles (NPs) on humans. However, the increasing large number of NPs required for testing has led to the need for new alternative testing strategies via computational means to replace the costly and laborious animal testing. Yet, such testing …
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Optical Properties of Substrate Supported Mixtures of Silver and Gold Nanoparticles
… of the spectrum. Herein, mixtures of Au and Ag nanoparticles (NPs) were combined to achieve new nanoarchitectures with useful electromagnetic properties. It was predicted that these mixtures would produce materials with multiple plasmon modes providing opportunity for greater manipulation of …
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Synthesis of Nanomaterials for Optical and Catalytic Studies
… source was developed to prepare metallic copper nanoparticles NPs with sizes that can be tuned. Copper particles with sizes ranging from 46 to 90 nm were synthesized and a clear correlation with plasmon absorption was obtained. In order to study the application and extend the usability of the …
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Expanding Antigen-specific Tr1 Cells to Treat Autoimmunity
… peptide-MHC complexes coated on iron-oxide nanoparticles (NPs). We have demonstrated that the therapeutic effects exerted by these NPs are associated with expansion of antigen-specific T-regulatory-type-1 (Tr1) cells and immuno-suppression of autoantigen-loaded antigen presenting cells …
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Increasing carbon nanotube forest density
… of a substrate with (typically iron) catalyst nanoparticles (NPs), which become nucleation sites for CNTs. This research was primarily focused on tuning the catalyst/substrate interfacial interactions in order to promote higher NP areal densities. A variety of density-enhancing procedures …
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A Theoretical and Experimental Investigation of the Physical and Chemical Properties of Solid Nanoscale Interfaces
… pre-treatment on the coarsening behavior of Pt nanoparticles (NPs) supported on ?-Al2O3 and (ii) deconvoluting the intrinsic (size effects) and extrinsic (ligand effects) physical and electronic properties of Au NPs encapsulated by polystyrene 2-vinylpiridine ligands.
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Functional Protein Delivery Using Polymeric Nanoparticles: A Novel Therapeutic Approach to Alpha-Synuclein Aggregation and Parkinson's Disease
… such as Parkinson's disease (PD). Synthetic nanoparticles made from polybutylcyanoacrylate (PBCA) have been previously shown to deliver otherwise impermeable drugs to therapeutic levels in vivo across the blood-brain barrier (BBB). It was not yet known, however, whether such particles could …
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Investigating the size effect of nanoparticles in Click Chemistry mediated cancer targeting
Size is one of the most important properties of nanoparticles (NPs) that affects their biodistribution, accumulation and retention in the tumour tissue. The effect of NP size on tumour targeting has been studied in various contexts, with or without a targeting mechanism incorporated. Herein, we …
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Modular Nanoparticles for Selective Cell Targeting
Nanoparticles (NPs) are an emerging technology in biomedical engineering with opportunities in diagnostics, imaging, and drug delivery. NPs can be prepared from a wide range of organic and/or inorganic materials. They can be fabricated to exhibit different characteristics for biomedical …
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Transition Metal Chalcogenide (Cadmium Sulfide) Nanoparticles: (Bio)synthesis, Characterization and Photoelectrochemical Performance
… desirable band edges and direct band gap. CdS nanoparticles (NPs) are widely applied in different areas such as biosensing, antibacterial agents, photocatalytic hydrogen evolution, photoelectrochemical (PEC) energy conversion, and photovoltaic devices. Biosynthesis is an innovative, …
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An investigation into the mechanism of toxicity of zinc oxide nanoparticles.
The wide scale use of ZnO nanoparticles (NPs) in the world consumer market has resulted in likelihood of exposure to human beings. The present study was aimed to assess the in vitro and in vivo interactions of ZnO NPs in the mammalian system and to elucidate the possible mechanism of their …
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Charge Transfer Dynamics in Cadmium Chalcogenide Quantum Dots based Heterostructures
… solar cells. CdSe QDs were assembled on TiO2 nanoparticles (NPs) using linker assisted assembly (LAA) approach and electron transfer was studied from band edge and surface states of CdSe QDs to TiO2 NPs using steady-state and time-resolved spectroscopy. Electron transfer was found to be 2-3 …
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Poly(ethyl glyoxylate) Solid-Core Particles for Drug Delivery
… ability to trigger the degradation of polymeric nanoparticles (NPs) by a specific stimulus can provide a method of improved drug targeting and selective release capabilities in vivo. The challenge for most polymeric drug delivery systems remains the necessity for many stimuli events to trigger …
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Study of Semiconducting Nanomaterials: Photoelectrochemistry and Dynamic Light Scattering
… of bare and sensitized titanium dioxide (TiO2) nanoparticles (NPs). A detailed study of NP colloidal behavior has been described with respect to dynamic light scattering (DLS) measurements. In our system, we studied electron transfer across the semiconductor (SC) electrode and electrolyte …
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Tailoring plasmonic substrates for SERS
… the surface was functionalised with metallic nanoparticles (NPs), and a large increase in spectral intensity was observed. This was attributed to a strongly localised electric field between the NP and the substrate, which resulted in an additional enhancement of between 102-103 depending on …
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