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.
Results
Showing 1 to 20 of 79 for “"Shell structure"”.
-
Strength analysis of a sandwich shell structure subjected to hydrostatic loading
Thesis: M.S., Massachusetts Institute of Technology, Department of Ocean Engineering, 1992
-
The investigation of solvent shell structure and reactivity in solvated metal ion clusters
The structure and reactivity of gas phase ionic clusters were studied using molecular beam mass-spectrometry, vibrational predissociation spectroscopy and Monte Carlo simulation. Cluster ions of the form M$\sp+$(S)$\sb{\rm N}$, M = Cs, Na and S = CH$\sb3$OH, NH$\sb3$, CH$\sb3$NH$\sb2$, …
-
Synthesis and structural characterization of ZnTe/ZnSe core/shell tunable quantum dots
… a novel approach to synthesize ZnTe/ZnSe core/shell tunable quantum dots. Characterizations such as transmission electron microscopy, wavelength dispersive X-ray spectroscopy, powder x-ray diffraction are employed to give evidence for the core/shell structure. Absorption, and photoluminescence …
-
Synthesis and Characterization of Silica Coated CdSe/CdS Core/Shell Quantum Dots
… was grown on CdSe QDs, forming a CdSe/CdS core/shell structure, to improve the photoluminescence. In order to use these QDs in-vivo, a more chemically robust coating, silica, was grown on the core/shell structure QD. The optical properties of the QDs were characterized by absorption and …
-
Modeling Shape Effects in Nano Magnetic Materials With Web Based Micromagnetics
… to a permalloy ring by adding a cross-tie structure with various widths. The in-plane hysteresis loop and reversal behavior have no notable difference in direction parallel to the cross-tie, but greatly changed in perpendicular and diagonal directions. The switching field distribution is …
-
Synthesis and Investigation of Nanomaterials by Homogeneous Nonaqueous Solution Phase Reactions
… of nanomaterials in different environments and structure, including spherical nanoparticles, nanowires and core-shell structure composites We first synthesized metallic nanomaterials in this system, such as ~10 nm Fe nanoparticles, ~6 nm Au nanoparticles, and ~100 nm Bi nanoparticles, this …
-
Nonaqueous Synthesis of Metal Oxide Nanoparticles and Their Surface Coating
… solution processes and the formation of core-shell structure metal oxide composites using some of these nanoparticles as the core with silica, titania or polymer as shell via a modified microemulsion approach. In the first part, the experimental procedures and characterization results of …
-
Development of manganese oxide based nanostructures by wet chemical methods for enhanced energy storage and photocatalytic applications
… comprised of development of manganese oxide nanostructures via wet chemical approaches such as electrochemical deposition and solvothermal techniques. The impacts of deposition parameters of manganese oxides were studied in details to tune the morphology, crystallinity and electrochemical energy …
-
Computation Of The Response Of Thin Piezoelectric Films
… charge of a thin piezoelectric film bonded to a shell structure. The method is applied to cases of a cylindrical shell structure, as well as a beam and plate for both generic and shaped piezoelectric films. An overview of the fundamentals of shell vibration theory is presented where the …
-
Understanding Structure-Property Relationships for Palladium-Gold Nanoparticles as Colloidal Catalysts
… of PdAu NP catalysts with emphasis on the structureproperty relationships in water-phase reactions, using hydro dechlorination (HDC) of trichloroethene (TCE) as the model reaction. Catalyzed TCE HDC is a potential approach for water pollution control, in which colloidal Pd-decorated Au NPs …
-
Towards low dose retrospective dosimetry on shelled species
This work investigates calcified tissues of shelled species for retrospective dosimetry using electron paramagnetic resonance (EPR) spectroscopy. To determine applicable samples for low dose studies, shells of crustacean and mollusc species were irradiated to 10 Gy using a 137Cs source. Reference …
-
The Synthesis of Core-Shell Iron@Gold Nanoparticles and Their Characterization
… with about 11 nm core of Fe and about 2.5 nm shell of Au. 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), …
-
Design of Functional Polymeric Micelles as a Carrier for Anticancer Drug Delivery
… delivery carriers due to their particular core/shell structure, ease of functionalization, sustained circulation in the blood and its ability to passively accumulate in leaky tumor tissues. Two important factors that should be considered in the design of polymeric micelles are kinetic stability …
-
Design and synthesis of microcapsules using microfluidics for autonomic self-healing in cementitious materials
… cracks, can extend the service life of concrete structures and decrease the costs associate with repair and maintenance actions. However, the size, shell thickness, shell material and mechanical properties of the capsules still need to be optimised to ensure self-healing performance. Thus, the …
-
A study of InAs based quantum structures for use in optoelectronic devices
… InAsSb NWs, InAs/AlSb NWs and InAs/GaSb core-shell NWs) have been investigated. The NW samples were grown by molecular beam epitaxy (MBE); self-catalysed droplet epitaxy was used as the growth mechanism for them. To improve the optical properties of InAs NWs, we further optimised the MBE …
-
Wet-spinning of neat single-walled carbon nanotube fiber from 100+% sulfuric acid
… been reported that liquid sulfuric acid forms shell structure while exposed to SWNTs.
-
Free form finding of grid shell structures
The general shape of a shell structure can have a great impact on its structural performance. This thesis presents a numerical implementation that finds the funicular form of grid shell structures. Two methods are implemented for the form finding: the potential energy method (PEM) and the force …
-
Selective metal ion-capturing by striped nanoparticles
… comes from their size, morphology, and structure, and frequently a ligand shell structure plays a key role in their distinct behavior and feature since it determines an interaction with environments. We manipulated gold nanoparticles protected by self-assembled monolayer (SAM) of mixed …
-
Cracking Common Notions Relating Egg Strength to Impact Orientation
The chicken egg possesses a shell structure that is conventionally thought to be strongest when loaded on its vertical poles, particularly the sharp end, which resembles a structural arch. This notion has influenced educational activities such as the "egg drop challenge", where participants …
Page 1 of 4