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 84 for “"Surface Modifications"”.
-
Plasmonic Surface Modifications with Hard-Core/Soft-Shell Nanoparticles
… of this thesis is the creation of functional surfaces with hard-core/soft-shell plasmonic colloidal building blocks in respect of optical surface functionalization. With the focus on bottom up surface modification using self-assembly and template assisted self-assembly techniques. The optical …
-
Engineering Nanocrystal Devices Through Cation Exchange And Surface Modifications
… electronic band structures; and (iii) large surface-to-volume ratio. Exploring these features has led to great advances in our fundamental understanding of carrier mobility and lifetime in NC assemblies, which governs the performance of their devices. To continue to push forward NC …
-
Taphonomic investigation into environmental effects on bone surface modifications.
… were used to inflict cutmarks upon the surface of Porcine bone; the bone specimens were deposited at a shallow depth and left on the surface of an identified hostile environment. The remains were removed bi-monthly and physical data from the cutmarks and geochemical data from the soil …
-
Surface modifications of iron oxide nanoparticles for biological applications
… suitable for various biological applications. Surface modifications were studied for transferring these MPs into biological environments as well as transforming them into functional nanoparticles. Certain surface modifications of MPs, such as attaching silane groups and silica coating, lead to …
-
Molecular quantification in digital health diagnostic cd with surface modifications
This thesis aims to document the experimental quantification of molecules on top of a common compact disc (CD) using the ubiquitous and inexpensive technology of a CD drive. To illustrate the concept, glucose is chosen as the target molecule and a colorimetric enzymatic glucose assay is carried out …
-
Thermoplastic electrode surface modifications for use as label-free electrochemical immunosensors
… seeks to explore techniques for modifying TPE surfaces for use as label-free immunosensors. Chapter 2 examines common antibody immobilization techniques applied to TPEs and determines that the standard existing protocols are lacking. Passive adsorption, EDC/NHS coupling, and chitosan films are …
-
Surface Modifications of Iron Oxide Nanoparticles for Magnetic Imaging and Diagnosis
Contrast agents are commonly used in magnetic resonance imaging (MRI) for their ability to selectively highlight or darken image brightness from different tissue components depending on their chemical nature. This work explores and discusses potential of colloidal iron oxide nanoparticles as …
-
Effect of surface modifications on biodegradation of nanocellulose and microbial response
… of nanocellulose, in terms of morphology and surface properties (e.g., charge), would further influence its biodegradability. Wetlands and anaerobic digesters were selected as two environmentally-relevant receiving environments that also play critical roles in global carbon turnover. To …
-
Exploring approaches to functional surface modifications using an atmospheric plasma jet printer
… printer to create highly functional, tailored surface modifications and coatings. Understanding the processes which occur in the plasma are essential to use the plasma jet printing parameters to control the features of the surface coating formed. High speed video analysis and optical emission …
-
Study of surface modifications for improved selected metal (II-VI) semiconductor based devices.
… based wet chemical etchants were applied to the surfaces of CdTe, CdS and ZnSe which were subsequently characterised by X-ray photoelectron spectroscopy. The ionic nature of these II-VI compounds meant that they behaved as insoluble salts of strong bases and weak acids. Acid etchants induced a …
-
Novel Syntheses and Surface Modifications of Electrode Materials for Superior Lithium-Ion Batteries
… lithium-ion batteries. The effects of surface modifications for LiMn2O4 cathode materials are studied by depositing ultrathin conformal amphoteric oxides via atomic layer deposition (ALD). In the case of ZnO coating, the thickness of ZnO ALD layers can be finely optimized at atomic …
-
The impact of surface modifications on the properties of α-SnWO4 photoanodes for photoelectrochemical water splitting
Zunehmende Luftverschmutzung und globale Erwärmung sind eine Herausforderung für das Leben der Menschheit im 21. Jahrhundert und darüber hinaus. Um die Auswirkungen auf die Umwelt, Gesellschaft und Wirtschaft abzumildern, ist ein Übergang in ein nachhaltiges Energiesystem unerlässlich. Wasserstoff …
-
Assessing the effects of fluvial abrasion on bone surface modifications using high-resolution 3-D scanning
… Qualitative macroscopic analysis shows that bone surfaces became smoother and polished after tumbling. Most cut marks and tooth marks were still visible. Results indicate that 57.1 percent of the cut marks lost their characteristic internal parallel striations and 18.4 percent of the cut marks …
-
Synthesis, surface modifications and biomedical applications of colloidal gold nanoparticles, towards controlled regulation of angiogenesis in conjunction with photo-thermal therapy
… corona, surrounding the gold core. Appropriate surface capping provides NPs with substantial stability against aggregation (and loss of their properties) in physiological media. Hence, crude colloids were stabilised with a variety of organic molecules, strongly interacting with the gold surface. …
-
Influence of oxidation treatment on the corrosion behaviour of Ti-6AI-4V alloy
… properties and exceptional corrosion resistance. Surface modifications such as thermal oxidation (TO) and oxygen boost diffusion hardening (OBDH) improve the tribological properties and wear resistance of Ti-6Al-4V. However, surface modification influences the corrosion behaviour of the metal. …
-
An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates
… of specific dimensions are machined onto the surface of a smooth plate, in a streamwise direction. The effect of these surface modifications on the drag force of a smooth plate is examined. The use of surface modifications as a means of reducing viscous drag on a body has potential aerodynamic …
-
Cohesive Zone Modelling of Fiber–Matrix Interface in Composite Materials
… to the composite’s strength. Nanoscale fiber surface modifications provide a promising approach to enhance interfacial bonding and can also impart multifunctionality. These multifunctionalities can sometimes come at the cost of reduced interface properties. Addressing this performance …
-
Assessment of the Wear Effects of Alumina-Nanofluids on Heat-Exchanger Materials
… methodologies for testing and evaluating surface-change by nanofluid impact. The work is presented on development of novel test rigs and testing methodologies, and on the use of typical surface analysis tools for assessment of wear and erosion that may be produced by nanofluids; prediction …
Page 1 of 5