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 128 for “"growth mechanism"”.
-
Predictive Modelling of the Growth of Nanoscale Silver Particles: Verification of an Aggregative Growth Mechanism
The formation mechanisms of nanoscale particles are poorly understood. Classical nucleation and growth models fail to describe many systems because they neglect important particle-particle interactions. In this study, we examine the formation of nanoscale silver particles from the reduction of …
-
Sutural growth: investigations on the growth mechanism of the coronal suture and its relation to cranial growth in the rat
Contains fulltext : mmubn000001_228853311.pdf (Publisher’s version ) (Open Access)
-
Growth and characterization of FeSi nanowires by chemical vapor deposition for gas sensing applications
… The nanowires followed the vapor solid (VS) growth mechanism, which does not require the use of a metal catalyst; the native silicon oxide layer on the silicon substrates played the role of the catalyst in the growth of these nanostructures. A second growth mechanism, involving the use of a …
-
III-nitride Semiconductors Grown By Plasma Assisted Molecular Beam Epitaxy
… They have been synthesized successfully by many growth methods. Among them, molecular beam epitaxy (MBE) is a promising epitaxial growth method owing to precise control of growth parameters, which significantly affect the film properties, composition, and thickness. However, the understanding of …
-
Modeling The Fluid To Solid Transition In Cement Paste, Mortar, And Concrete
… by application of generalized mathematical growth models. In the general case growth models are applied to mechanisms such as ontogenesis, chemical reactions, ecological systems (such as population growth or predator-prey relationship), and so on. In this specific research the models …
-
Integrated Catalytic Fabrication Approaches for Graphene-Based Electronic Devices
… the required transfer step from the metal growth substrate to the desired dielectric substrate is a major bottleneck for the integrated manufacturing of graphene-based electronic devices. The performance of a typical graphene field effect transistor (GFET) is marred by the presence of …
-
Contemporary Problems in Aerosol Aggregation and Gelation
… research on investigating the structure and growth mechanism of aerosol aggregates with sizes spanning across several orders of magnitude. This dissertation focuses on some contemporary problems that remain unaddressed in this topical area. Aerosol aggregates in sub-micron regimes, which are …
-
Nucleation and growth of pharmaceutical crystals
Investigating nucleation, crystal growth and solid-state transformations at the nanoscale are of significant interest, as more complex routes have roused questions about the classical view of these processes. This thesis reports the characterisation of prenucleation clusters in olanzapine (OZPN) …
-
Surface Characterization of Poly (epsilon-caprolactone) at the Air/Water Interface
… a fundamental understanding of PCL's degradation mechanisms and crystallization properties. PCL spherulites were commonly observed in previous bulk studies. This thesis focuses on PCL crystallization in Langmuir monolayers. Brewster angle microscopy (BAM) studies show that square, distorted …
-
Manipulation of ring strain and antiaromaticity in the design and synthesis of unique optoelectronic materials
… pentacene is also investigated. The chain-growth mechanism of polymerization allows for greater control of molecular weight and polydispersity than does the step-growth mechanism, however is currently limited to only a few reactions. Due to its unique Diels-Alder reactivity, …
-
DLC Thin Film Assisted ZnO Nanowires Growth
… distance were controllable by fine tuning the growth parameters and changing the DLC film deposition temperature. HRTEM examination confirms the NWs were single crystalline with c-axis preferred orientation (lattice parameter c = 0.519 nm). From our experiment results, a ZnO polycrystalline …
-
Formation of uniform particles: Morphology and colloidal stability, and stable particle growth during precipitation from titanium alkoxides
The mechanisms of formation of uniform particles from hydrolysis and condensation of titanium alkoxides are investigated. Evidence is presented suggesting two separate processes are determining the success of precipitating uniform particles: generating and maintaining a stable suspension throughout …
-
Synthesis of bilayer graphene and hexagonal boron nitride by chemical vapor deposition method
… deposition (CVD) method and to understand the growth mechanism. The second part involves exploring methods of synthesizing hexagonal boron nitride (hBN). The successful isolation of monolayer graphene in 2004 has attracted many researchers to search for potential applications of graphene and …
-
Studies on the fluidised bed granulation process.
… with the objectives of elucidating the mechanism of granule formation and identifying the fundamental parameters affecting granule quality thereby enabling the true benefits of the process to be realised. Initially the effect of seven process variables upon granule quality was quantified …
-
TOWARD UNDERSTANDING THE FUNDAMENTALS IN THE SYNTHESIS OF METAL NANOCLUSTERS
… to Au NP synthesis. We will also focus on the growth mechanism of Au NCs at molecular level, which is not yet resolved for Au NP synthesis.
-
Characterizing growth conditions in chlorine-activated diamond chemical vapor deposition
… suggests a low substrate temperature diamond growth mechanism by atomic carbon insertion reactions. Such a mechanism becomes pronounced at high atomic hydrogen concentrations and can lower the apparent growth activation energy in the low substrate temperature regime. Experiments using tubular …
-
Quantitative Fracture Strength of Lithiated Tin Oxide Nanowires by In-Situ SEM Tensile Experiments
… synthesized using the vapor-liquid-solid (VLS) growth mechanism on stainless steel substrates using a gold (Au) catalyst. Ex-situ lithiation of the SnO2 nanowires was performed directly using the stainless steel growth substrates by the electrochemical half-cell method which did not involve the …
-
Shape-Selective Growth of Bimetallic Nanostructures
… GRR was also employed with seed-mediated growth method to fabricate Au/Ag sandwich nanostructures with interior gaps, in which SERS probe molecules were embedded. Such sandwich nanostructures are promising SERS-active substrates. In addition, the seed-mediated growth method was applied to …
-
ΣΧΗΜΑΤΙΣΜΟΣ ΘΕΙΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ
… RESULTED IN CHANGE OF THE CRYSTAL GROWTH-MECHANISM FROM SURFACE NUCLEATION TO A STEP DISLOCATION MECHANISM. THE PRESENCE OF ORGANOPHOSPHORUS COMPOUNDS HEDP, ENTMP AND NTMP) EVEN AT VERY LOW CONCENTRATIONS (A FEW PPM) DECREASED THE RATES OF CALCIUM SULFATE DIHYDRATE PRECIPITATION IN …
-
The Effect of Nitrogen on The Crystallization Behavior of Barium-Silicon-Aluminum-Oxygen-Nitrogen Oxynitride Glasses (Phase Separation, Crystal Growth)
… into two distinct phases via a nucleation and growth mechanism, with the droplet phase being enriched in nitrogen. The droplet phase was the first to crystallize, followed by the growth of crystals into the matrix by an interface-controlled process. The final microstructure consisted mainly of …
Page 1 of 7