Sökning: "Materialkemi"

Visar resultat 1 - 5 av 31 uppsatser innehållade ordet Materialkemi.

1. 1. Principal Component Analysis for STEM-EDS images: Optimal collection parameters

   Kandidat-uppsats, Lunds universitet/Centrum för analys och syntes

   Författare :Isac Lazar; [2020]
   Nyckelord :Principal Component Analysis; PCA; STEM; data analysis; machine learning; metal machining; materials; materials chemistry; materialkemi; Technology and Engineering;

   Sammanfattning : STEM-EDS is a common technique used for compositional mapping in materials. The vasts amounts of raw data produced by STEM EDS is suitable for advanced analysis using methods in unsupervised machine learning. One powerful method is Principal Component Analysis (PCA) which can automatically discover significant chemical correlations in a sample. LÄS MER

3. 2. Reduction of iron oxide by hydrogen studied using environmental transmission electron microscopy

   Master-uppsats, Lunds universitet/Centrum för analys och syntes

   Författare :David Wahlqvist; [2020]
   Nyckelord :Transmission Electron Microscopy; Electron Diffraction; Iron Oxide; Reduction; Iron; Environmental Transmission Electron Microscopy; ETEM; Materials chemistry; Materialkemi; Chemistry;

   Sammanfattning : This thesis aims to explore how the reduction of iron oxide by hydrogen should be explored in an environmental transmission electron microscope (ETEM). This is done by performing a series of reduction attempts in the ETEM at nCHREM, Lund University, and exploring how the ETEM conditions are different from those used commercially. LÄS MER

4. 3. An Investigation of the Adhesive Interaction between Polyethylene and Silicone with DMA and AFM

   Master-uppsats, Lunds universitet/Centrum för analys och syntes

   Författare :Joel Falk; [2019]
   Nyckelord :Atomic Force Microscope; Adhesion; Characterization; Dynamic Mechanical Analysis; Injection Molding; Polyethylene; Polymer; Silicone; Test method development; Materials chemistry; Materialkemi; Technology and Engineering;

   Sammanfattning : Stickiness between materials can be a challening task when dealing with the complex interactions and processes related to packaging engineering. Part of the problem is that many factors like temperature, pressure, surface treatment as well as surface roughness all could play a part in contributing to the stickiness between materials. LÄS MER

5. 4. Iron-Based Dye-Sensitized Solar Cells - From Theory to Working Solar Cell

   Master-uppsats, Lunds universitet/Centrum för analys och syntes

   Författare :Linnea Lindh; [2019]
   Nyckelord :Dye-sensitized solar cells; Grätzel cells; solar cells of the future; solar cells of tomorrow; spectroscopy; time-resolved spectroscopy; materials chemistry; materialkemi; Chemistry;

   Sammanfattning : In the hunt for fossile-free energy-harvesting techniques, solar cells constitute one of the most promising techniques. Today, silicon-based solar cells are the dominant technique on the market but even the Silicon solar cell has limitations which means that there is a motivation for developing new solutions. LÄS MER

7. 5. Dissolution and fibre spinning of cellulose from an ionic liquid

   Master-uppsats, Lunds universitet/Centrum för analys och syntes

   Författare :Erika Andersson; [2018]
   Nyckelord :Cellulose; scattering; ionic liquid; dissolution; regenerated cellulose fibre; structure-property relationship; materials chemistry; materialkemi; Chemistry; Technology and Engineering;

   Sammanfattning : Regenerated cellulose fibres can become a sustainable alternative to cotton and polyester in textile applications. One method of producing such is dissolution of cellulose in an ionic liquid (IL) and regeneration through air-gap spinning. LÄS MER