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Showing result 1 - 5 of 10 swedish dissertations matching the above criteria.

2. 1. Structure of Self-Assembled Monolayers on Gold Studied by NEXAFS and Photoelectron Spectroscopy

   Author : Somsakul Watcharinyanon; Lars Johansson; Hans Siegbahn; Karlstads universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Self-assembled monolayer SAMs ; X-ray photoelectron spectroscopy XPS ; Near-edge X-ray absorption fine structure NEXAFS spectroscopy; Infrared reflection absorption spectroscopy IRRAS ; contact angle measurements; Kelvin probe measurements; oligo phenyleneethynylene OPE ; Porphyrin-functionalized OPE; Tetraphenylporphyrin; Ferrocene-terminated alkanethiol; thiol; silane; Au 111 ; Physics; Fysik; Physics; Fysik;

   Abstract : Self-assembled monolayers (SAMs) provide well-defined and ordered films of molecules spontaneously chemisorbed on a surface. By designing molecules with desired functionalities, such molecular film can be interesting for a range of applications from molecular electronics to catalysis. READ MORE

4. 2. Localized corrosion of stainless steels in chlorine dioxide bleach filtrate solutions

   Author : Gustaf Bäck; KTH; []
   Keywords : stainless steels; bleaching; chlorine dioxide; ClO2; localized corrosion; weld oxides; redox potential; potentiostatic polarization; scanning Kelvin probe;

   Abstract : Stainless steels are extensively used in pulp bleach plantsbecause of their high corrosion resistance. However, alsostainless steels might suffer from corrosion and in bleachplants this is a problem. READ MORE

5. 3. Mechanistic studies of localized corrosion of Al alloys by high resolution in-situ and ex-situ probing techniques

   Author : Ali Davoodi; Jinshan Pan; Gerald S. Frankel; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; localized corrosion; pitting; aluminum alloy; intermetallic particle; Volta potential; cathodic activity; micro-galvanic effect; size dependence; SKPFM; in-situ AFM; integrated AFM SECM; numerical simulation; micrometer resolution; EIS.; Chemistry; Kemi;

   Abstract : A multi-analytical approach based on in-situ and ex-situ local probing techniques was employed to investigate localized corrosion mechanisms of some aluminum alloys in chloride containing solutions, focusing on the influence of intermetallic particles (IMPs) in the alloys. In the EN AW-3003 alloy, SEM-EDS analysis revealed constituent and dispersoid IMPs. READ MORE

6. 4. Probing the effects of photodegradation of acceptor materials in polymer solar cells: bulk, surface, and molecular level

   Author : Vanja Blazinic; Ellen Moons; Leif Ericsson; Thomas Wågberg; Karlstads universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; photovoltaics; polymer solar cell; conjugated polymers; fullerene; photo-oxidation; spectroscopy; Physics; Fysik;

   Abstract : Polymer solar cells (PSC) have reached record power conversion efficiencies of over 15%. The operational lifetime of PSCs, however, has to increase for their use in large area outdoor applications. READ MORE

7. 5. Use of local electrochemical techniques for corrosion studies of stainless steels

   Author : Nuria Fuertes; Rachel Pettersson; Mari Sparr; Ulf Kivisäkk; Yolanda Hedberg; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stainless steel; passive film; thermal oxides; work function; pickling; SKPFM; SVET; XPS; AES; Teknisk materialvetenskap; Materials Science and Engineering;

   Abstract : The excellent corrosion resistance of stainless steels arises from the presence of a passive film on its surface. Above 10.5wt% Cr a chromium oxide of 1-3 nm is formed on the surface of the metal that in case of damage will reform and hinder further dissolution of the metal. READ MORE