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 15 of 15 for “"Hexadecylamine"”.
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Synthesis and evaluation of novel ligands for quantum dot stabilisation and polymerisation studies
… chemistry via displacement of the original hexadecylamine capping layer of quantum dots was evaluated. Finally the surface modified quantum dots were investigated for enhancement in their inherent properties and improved compatibility with the various applications for which they were …
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Synthesis and characterization of cadmium selenide and zinc selenide nanoparticles
… in the organic solvents was facilitated by hexadecylamine (HDA). The evidence for the formation of the nanoparticles with a desired quality was confirmed by using different techniques such as UV-Vis absorption spectroscopy, photoluminescence spectroscopy (PL), X-ray diffraction (XRD), …
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The development of chemically engineered pullulan for drug delivery
… The amines used in this modification step were: hexadecylamine, decylamine, cadaverine (1-5 diaminopentane), and three jeffamine® (polyoxypropylenediamine) compounds of differing molecular weights (230, 400 and 2000). Results concluded that all six pullulan derivatives show an increase in reduced …
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Semiconductor nanostructures and nanoassemblies: a new perspective on their syntheses, properties and photophysical behaviour.
… precursors formed In0 only in presence of hexadecylamine, but in the absence of the amine could form InP nanoparticles. Thermolysis of [(PhCH2)2InP(SiMe3)2]2, a new precursor, gives either InP nanoparticles or nanowires, depending on the presence or absence of stearic acid. This provided a …
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Synthetic Strategies and Design of Highly Luminescent Cholinomimetic Quantum Dots
… trioctylphosphine, trioctylphosphine oxide and hexadecylamine as the coordinating ligands and passivating agents to control growth. The QDs were ~6.2 nm in diameter and exhibited strong and narrow fluorescence intensity and broad UV-absorption properties. The organic ligands were exchanged for …
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A facile hybrid method to synthesize metal and metal chalcogenide nanoparticles using various capping groups
… elongated when capped using alkylamines such as hexadecylamine (HDA) and OA, however at low temperature of 90oC they appeared to be close to spherical. The antimony chalcogenides, Sb2S3, Sb2Se3 and Sb2Te3 gave a similar rod shape morphology. The Sn nanoparticles appeared aggregated to some …
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Synthesis and shape control of functionalized cadmium telluride nanoparticles
… by passivating with organic surfactants such as hexadecylamine (HDA) and tri-n-octylphosphine oxide (TOPO) for their solubility and stability in organic solvents. To stabilize and make the nanoparticles water soluble, L-cysteine ethyl ester hydrochloride and triethanolamine were used as capping …
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CuAg bimetallic nanoparticles for the electrochemical reduction of carbon dioxide
… One synthesis was performed in the presence of hexadecylamine (HDA), surfactant, while the other was performed in its absence. The electrocatalytic performance evaluation was conducted using two reactors, a batch reactor with a gas diffusion electrode, and a rotating disc electrode reactor. It …
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Síntesis de nanoestruturas metálicas de oro y plata a partir de precursores organometálicos: Propiedades plasmónicas y catalíticas
… by an alloy of both metals and stabilized with hexadecylamine. The use of different amounts of the stabilizing agent and solvents of different boiling points such as tetrahydrofuran, toluene or mesitylene has permitted to exert an excellent control on the size and metal composition of the …
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The use of metal complexes to deposit metal chalcogenide thin films and nanoparticles
… in tri-octylphosphine oxide (TOPO) and hexadecylamine (HDA). The optical properties of the nanoparticles were studied by using ultraviolet (UV)-visible and photoluminescence (PL) spectroscopy. There were blue shifts in the band gaps for all CdS samples; however, photoluminescence was …
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Synthesis and growth dynamics study of silver nanoparticles
… single molecule precursors for the synthesis of hexadecylamine (HDA) and tri-octylphosphine oxide (TOPO) capped silver nanoparticles. The absorption spectra of the HDA and TOPO-capped silver nanoparticles exhibit surface plasmon resonance (SPR) absorption in 400-420 nm regions. In chapter four, …
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Synthesis and properties of transition-metal arsenide nanostructures: from superparamagnetism to superconductivity
<p>"This dissertation study focuses on developing new protocols for synthesis of nanostructured transition-metal pnictides including superconducting LiFeAs and studying their structure- property relationship. Nanostructured materials are known to differ in properties compared to their bulk …
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Nickel and cobalt sulfide nanomaterials for magnetic and energy applications
… it was discovered that docecylamine and hexadecylamine capping agents produced phase pure Ni3S4 and Ni3S2, respectively; phase identification was conducted using the powder X-ray diffraction technique. On the contrary, oleylamine capping agent produced mixed phase NixSy nanoparticles from …
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Synthesis and Applications of Copper Nanowires and Nanoplates
… in a solution containing a CuCl2 precursor and hexadecylamine (HDA). Increasing the concentration of I- results in a higher ratio jmp(100)/jmp(111), which alludes to the passivation of the {111} basal surfaces of Cu nanoplates, resulting in lateral growth. This work clarifies the role of halide …
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Synthesis and characterization of N-alkylthiourea and N, N -dialkylthiourea complexes of Cu, Cd and Pb, and their use as single source precursors for the synthesis of metal sulfide nanoparticles
… yield of the products as insoluble particles in hexadecylamine (HDA) and tri-n-octylphosphine oxide (TOPO). X-ray powder diffraction (powder XRD) patterns are consistent with predominantly hexagonal phase although copper sulfide showed evidence of various stoichiometric ratios. These phases were …