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 30 for “"Nanocluster"”.
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Fundamental research into gold nanocluster properties
… possibilities. Some properties of gold nanoclusters can be attributed more to the core or more to the ligand layer of the nanocluster. Certain properties, like electronics and magnetism, are due to the superatomic electron count and electronic structure from the core and depend on the …
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Development of Gold Nanocluster-Based Biosensors
Gold nanoclusters possess both theoretical and practical importance in the development of ultrasensitive biosensors based on surface-enhanced Raman spectroscopy (SERS). Manipulation of gold nanoclusters in a predictable and reproducible manner for the application of refined biochemical analysis …
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Lysozyme encapsulated gold nanocluster for studying protein denaturation
… is needed. Lysozyme-encapsulated gold nanoclusters (Lyz-AuNCs) have interesting fluorescence properties that can be used in a variety of fluorescence measurement techniques and maybe a promising tool for studying protein denaturation. So far, studies of the fluorescence characteristics …
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Fabrication of metallic nanostructures from sputtered nanocluster precursors
… and electrical properties of copper nanocluster devices generated by DC magnetron sputtering and annealed at temperatures up to 1100 C. At each annealing step, the resistivity of the cluster device was measured and electron micrographs were taken of the cluster depositions. …
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Catalytic properties of palladium nanocluster synthesized within microphase-separated diblock copolymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
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The influence of ‘nanocluster’ reinforcement on the mechanical properties of a resin-based composite material
… to this approach was the introduction of ‘nanocluster’ particles, which are essentially an agglomeration of nano-sized silica and zirconia particles. Although these materials have demonstrated a degree of clinical and experimental success debate remains as to their specific benefit compared …
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Block copolymer micellar thin films as templates for the production of tunable inorganic nanocluster arrays and their applications
… copolymer thin films to synthesize inorganic nanocluster arrays. These arrays have a wide range of possible applications in fields such as catalysis, data storage, and nanofabrication. This thesis demonstrates a general route for using block copolymer micellar thin films as templates to …
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Plasmon Hybridization in Clusters of Metal Nanoparticles and Magnetic Nanoparticle Oligomers
… altering the optical properties of metal nanoclusters are being explored. In this dissertation, we will focus on the latter; more specifically, the impact of metal nanocluster geometry on the collective plasmon behavior. It will be shown that complicated nanoparticle geometries can be …
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Functionalized Nanoparticles for Targeted Chemotherapy [Nanoparticelle funzionalizzate per terapie targat]
… ossido di ittrio drogate con erbio e neodimio, nanocluster d'oro luminescenti e nanoparticelle a base di lipidi. La modifica ha dato la possibilità di migliorare la loro biocompatibilità e capacità di targeting. Le nanoparticelle di ossido di ittrio, inizialmente caratterizzate come una …
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Characterization and technical studies of semiconductor nanoclusters synthesized within polymer films
Semiconductor nanoclusters were synthesized within diblock copolymer films containing carboxylic acid units on one of the blocks. Diblock copolymer films microphase separate during film casting, and yield many different morphologies (spherical lamellar/ cylindrical ) depending on the ratio of the …
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Optical properties and biological applications of fluorescent gold nanoclusters
… novel fluorescent nanomaterial, fluorescent gold nanoclusters (AuNCs) possess numerous exceptional characteristics compared with other luminescent materials such as good water-solubility, high photostability, large Stokes shift, ultrasmall size, nontoxicity, and good biocompatibility. Despite …
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Nanostructure fabrication by electron and ion beam patterning of nanoparticles
… (Q-jC/cm), has been introduced. A Nanocluster Source capable of generating a beam of charged, inorganic nanoparticles has been characterized. The relationship between power supplied to the magnetron of the source and the size of deposited clusters has been plotted. Techniques for …
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Silicon rich nitride for silicon based laser devices
… low voltages, a low annealing temperature for Si nanocluster (Si-nc) formation and a large refractive index for strong optical confinement. Strong light emission from localized states in Si-nc embedded in SRN was demonstrated with a PLQE (Photoluminescence Quantum Efficiency) of 7%. This effect …
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Ab initio simulation and optimization of phonon drag effect for lower-temperature thermoelectric energy
… A practical phonon filtering method based on nanocluster scattering is shown to enhance zT due to reduced thermal conductivity and optimized phonon drag effect. This work opens up a new venue towards better themoelectrics by harnessing non-equilibrium phonons. More material systems can be …
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Surface Engineering for Microsensing
… intensification of the Raman spectra. Gold nanoclusters were also directly synthesized on thiol functionalized carbon nanotubes film and characterized by means of X-ray photoelectron spectroscopy. Detailed analysis of the Au 4f core line is used to study the chemical modifications occurring …
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Carbon Incorporation During Growth of Epitaxial Germanium(1-Y)carbon(y) Layers on Germanium(001) Substrates
… multiple C atoms, referred to collectively as C nanoclusters, are energetically more favorable than substitutional C and Ge-C split interstitials and yield a nearly zero average strain. In contrast, substitutional C and Ge-C split interstitials produce large tensile and compressive strains, …
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Three-Dimensional Single-Molecule Localisation Microscopy and Visualisation Techniques
… density 95 (PSD95). PSD95 is known to form nanoclusters which make up the basic structural unit of an excitatory synapse, however, through the sensitivity of 3D DH-PSF imaging, we were able to observe the presence of diffuse PSD95 protein. We have developed a series of quantitative imaging …
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Dynamics of electrons and excitons in nanoclusters and molecules studied by many-body Green's function theory
… use of the unique properties of semiconductor nanoclusters to fabricate PV devices. The physics of semiconductor nanoclusters such as the dynamics of electrons and excitons are the fundamentals for fabricating nanocluster-based PV devices. Although the theories and numerical approaches have …
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Portable Microfluidic Platform Employing Young-Laplace Pumping For Multiplexed Lab-On-A-Chip Applications
… on-chip experiments for silver nanoparticle and nanocluster synthesis. This work builds a promising groundwork for future lab-on-a-chip devices. An approach is discussed that can be employed to design and develop on-chip bio-immunoassays (e.g. employing sandwich-ELISA) for pathogen detection …
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Complex Plasmonic Nanostructures: Symmetry Breaking and Coupled Systems
… the plasmon hybridization model. Next, coupled nanoclusters of seven particles arranged in a hexagonal pattern are studied. It is found that these nanoclusters support Fano resonances due to the coupling and interference of degenerate subradiant and superradiant plasmon modes. These structures …
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