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 100 for “"gold nanoparticle"”.
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Fabrication of water-soluble gold nanoparticle aggregates
Mixed monolayer protected gold nanoparticles were linked using octanedithiol to form aggregates containing hundreds of nanoparticles. These aggregates are an interesting material, posing potential applications in the fields of chemistry, biology and materials science. This study examined the …
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Synthesis and Cytotoxicity Studies of Gold Nanoparticle Systems
… thioalkylated polyethelene glycol (PEG)-capped gold monolayer protected clusters (MPCs) has been successfully conducted. This followed a series of aqueous and nonaqueous synthetic protocols carried out to synthesize gold nanoparticles and MPCs of sizes ranging between 4 – 200 nm. …
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A Monte Carlo-based Model Of Gold Nanoparticle Radiosensitization
… enhance the effects of radiation at the tumour. Gold nanoparticles (AuNP) represent a novel radiosensitizer with unique and attractive properties. AuNPs enhance local photon interactions, thereby converting photons into localized damaging electrons. Experimental reports of AuNP radiosensitization …
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Supramolecular Nanostructures as Support Materials for Gold Nanoparticle Catalysts
The high catalytic activity of gold nanoparticles (AuNPs) has led to their use in a variety of industrially-relevant reactions, such as low-temperature CO-oxidation and selective alcohol oxidation. Most current research focuses on heterogenous gold catalysis, with metal oxides being the most …
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Synthesis Of Alkylthiol-containing Fluorene Derivatives For Gold Nanoparticle Functionalization
… accepting groups at the 2 and 7 positions, to gold nanoparticles of different sizes by exploiting the affinity of the thiol functional group for gold. The distance between the dye and nanoparticles was varied by introducing two alkyl chains containing different number of carbon atoms at the 9 …
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Gold nanoparticle cellular uptake and its implications for cancer therapy
For those suffering from cancer nanoparticle-enhanced radiotherapy has shown great potential as a means to improve patient outcome. In order to maximise the benefit obtained from such treatment a full understanding of the uptake dynamics of nanoparticles is required. As such the aim of this body of …
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Improved Detection of Gold Nanoparticle Labels for Paper-Based Analytics
… devices.</p> <p>The detection limit of gold nanoparticles for the unaided eye was determined at a concentration of (3.98 ± 0.40)×10<sup>-11</sup> M; mobile electronic device image analysis, microscope image analysis, and the conductance based approach showed improvements by approximately …
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Sustainable Nanotechnology: Life Cycle Thinking in Gold Nanoparticle Production and Recycling
… LCA modeling to reduce the life cycle impacts of gold nanoparticle (AuNP) production. The LCA studies were focused on three aspects of AuNP synthesis: 1) the use of bio-based ("green") reducing agents; 2) the potential for recycling gold from nanomaterial waste; and, 3) the reduction of the life …
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Self-Assembly, Spatial-, and Size- Control of Gold Nanoparticle/Block Copolymer Conjugates
… the functionalization and self-assembly of gold nanoparticles (AuNP) with functional block copolymers of styrene and 4VP (S4VP) in solution were presented. S4VP block copolymers with different block lengths of 4VP were synthesized via sequential living anionic polymerization. Two different …
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Triplex dna receptor-gold nanoparticle conjugates for detection of oxidized dna base
… system was designed and triplex conjugated gold nanoparticles were synthesized. The melting temperature of the triplex DNA-GNP conjugates were 5-OHU concentration dependent, which demonstrated the potential of the system for colorimetric detection of urinary 5-OHU.
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Amphiphilic gold nanoparticle-based cytosolic drug delivery platform for cancer and infections
… platform based on cell-penetrating amphiphilic nanoparticles (amph-NPs), which are capable of embedding within and subsequently penetrating cell membranes without toxicity. Amph-NPs have dual properties of entrapping concentrated hydrophobic small molecules in their ligand shells and …
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Processes for Forming Plasmonic Waveguides from Self-Assembled Gold Nanoparticle Thin Films
… if means could be found to arrange colloidal nanoparticles on suitable substrates. In this project, nanoscale self-assembly has been investigated with the aim of achieving such ends. Colloidal nanoparticles have been synthesized and self-assembled onto substrates such that they show near field …
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Design of an Ytterbium-169 brachytherapy source for gold nanoparticle-aided radiation therapy
Gold nanoparticles can serve as an ideal radiosensitizer for radiation therapy due to the high-atomic-number nature of gold and the increased tumor specificity in nanoparticle form. The degree of radiosensitization is highly dependent on both the local gold nanoparticle concentration in the tumor …
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Mechanism of Action and Gold Nanoparticle Delivery of Pt(IV) Prodrugs of Cisplatin
… higher anticancer activity and better targeting, gold nanoparticle (AuNP) coated with the host ligand per-6-thio-β- cyclodextrin, was synthesized as a drug delivery vehicle for complex <strong>4</strong>. The results of cytotoxicity studies show that the loaded delivery vehicle inhibits the growth …
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The Photophysics and Transport Properties of Non-Covalent Silicon Phthalocyanine Gold Nanoparticle Conjugates
… 4 (Pc 4) and polyethylene glycol coated gold nanoparticles (PEGylated Au NPs) through photophysics and transport studies. A detailed investigation of Pc 4’s photophysical behavior in water both with and without Au NPs is presented, elucidating the role of intramolecular photoinduced …
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Exploration of catalysis activation emergency as a function of gold nanoparticle surface morphology
The application of rippled gold nanoparticles with bi-ligand surface morphology as a catalyst was tested. The hydrolysis of 2,4-dinitrophenyl acetate (DNPA) served as the catalytic reaction being analyzed and the bi-ligand composition used was 16-mercaptohexadecanoic acid to imidazole thiol (MHA to …
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Effects of varying ethanol and water concentrations as a gold nanoparticle gel solvent
Striped gold nanoparticles are unique in several of their characteristics and applications. Recent experiments have determined a new medium with which contain the nanoparticles is that of a chemical gel. The nanoparticles for use in these studies do not require a polymer base in order to form a gel …
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Noncovalent adsorption of nucleotides in gold nanoparticle DNA conjugates : bioavailability at the bio-nano interface
… DNA sequence on the binding interaction between gold nanoparticles and thiolated DNA (AuNp-DNA). Base specific noncovalent nucleotide adsorption on gold surfaces can affect nucleotide bioavailability in solution. Systematic investigation of DNA oligonucleotide sequence, the location of specific …
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