MESA+ University of Twente
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MESA+ 2012

Stefan Von Kann (Promotion date: 21 December 2012) The response of dense suspensions to an external force was studied using two different experiments.
In the first experiment objects were settled in a deep bath of a dense cornstarch suspension.
Edit Kutnyanszky (Promotion date: 20 December 2012) Addressable polymer structures play an increasingly important role in a variety of areas, such as surface engineering, drug delivery, and micro/nanofluidics. Thomas Denis (Promotion date: 14 December 2012) Coherent electromagnetic waves are extensively used in various fields of research and many applications. Almost every part of the electromagnetic spectrum, ranging from radio waves to hard X-rays, has been put to work with great success for the benefit of mankind. Igor Santos De Oliveira (Promotion date: 7 December 2012) Depending on the characteristics of the liquid, dispersion of colloids are observed to align in the direction of the flow forming string-like structures. Moreover, mixtures of bi-dispersed colloids also segregate by size. Imran Akca (Promotion date: 5 December 2012) Optical coherence tomography (OCT) is a three-dimensional optical imaging method that offers non-invasive, close-to-histology-level image quality. Based on broadband spectral interferometry, OCT has enabled clinical applications ranging from ophthalmology to cardiology, that radically altered the view of in vivo medical diagnostics... Edward Bernhardi (Promotion date: 22 November 2012) This research concerned the investigation and development of Bragg-grating-based integrated cavities for the Al2O3 waveguide platform, both from a theoretical and an experimental point of view, with the primary purpose of realizing narrow-linewidth, monolithic rare-earth-ion-doped channel waveguide lasers... Jealemy Galindo Millàn (Promotion date: 2 november 2012) In this thesis, new approaches directed towards simple and functional imaging agents (IAs) for magnetic resonance (MR) and fluorescence multimodal imaging were proposed.
Hybrid silver nanostructures (hAgNSs) were grown and studied...
David Fernández Riva (Promotion date: 26 October 2012) Sonochemistry is defined as the chemical effects due to acoustic cavitation: formation, growth and collapse of bubbles in liquids. During these cavitation events high temperatures and pressures are achieved inside the bubbles (more than 5000 K and 1000 atm), which may generate radicals by breaking water moleculs inside the bubble... Mudassir Iqbal (Promotion date: 18 October 2012) The research deals with the synthesis and evaluation of new potential ligands for the complexation of actinide and lanthanide ions, either for their extraction from bulk radioactive waste or their stripping from an extracted organic phase for final processing of nuclear waste... Rerngchai Arayanarakool (Promotion date: 18 October 2012) The main objective of this thesis was to develop a micro- and nanofluidic platform for the generation and manipulation of tiny (femtolitre) aqueous droplets in the oil phase (water-in-oil emulsion), for the encapsulation of a single molecule of enzyme to perform an enzyme kinetic analysis... Chunlin Song (Promotion date: 17 october 2012) The research mainly aims at investigation of the rate of oxygen exchange at the surface of oxide ion conductors.
A fast and simple method, referred to as pulse 18O-16O isotopic exchange (PIE), for measurement of the rate of surface exchange on oxide ion conductors has been developed. The method...
David J. Lopez Penha (Promotion date: 27 September 2012 Simulations in porous media widely adopt macroscopic models of transport phenomena. These models are computationally efficient as not all geometrical details at the pore scale are accounted for. Generally, these models require closure relations for effective transport parameters, where the parameters are used to convey... René Houben (Promotion date: 27 September 2012) The common denominator of this thesis is the quest for processing a wider range of materials using inkjet technology. One of the limiting factors in commercial available systems is their range of processable viscosities... Laura Agazzi (Promotion date: 20 September 2012) This thesis presents in-depth spectroscopic investigations of the optical properties of rare-earth-ion-doped Al2O3 (specifically Al2O3:Er3+ and Al2O3:Yb3+), materials employed for the realization of integrated optical devices such as waveguide amplifiers and lasers. The aim is to provide important spectroscopic parameters... Menno Veldhorst (Promotion date: 19 September 2012) In 1926 Albert Einstein posed: “A question of particular interest is whether the interface between two superconductors becomes superconducting as well”. Brian Josephson came with the answer, honored with a Nobel price, and this year celebrated as fifty years of Josephson effects... Chung-Yul Yoo (Promotion date: 12 September 2012) Mixed ionic-electronic conductors (MIECs) have a potential for use as an oxygen separation membrane, which possesses oxide ionic conductivity in conjunction with electronic conductivity at elevated temperatures, typically 500 – 1000 °C... Omar Valsson (Promotion date: 7 September 2012) The visual opsin proteins represent an important family of photosensitive biosystems involved in the process of vision. All visual opsins share the same photoreceptor molecule, the retinal chromophore, while variations in the protein environment surrounding the chromophore are responsible for tuning its absorption over a wide range of wavelengths... Felicia Ungureanu (Promotion date: 6 September 2012) A new optical method is introduced, based on monitoring properties of many individual gold nanoparticles for the detection of low concentrations of biomolecules. The proof of principle was demonstrated and the performance of the method was determined in an application for protein detection and quantification... Remco Verdoold (Promotion date: 5 September 2012) This thesis describes the development of a novel biosensor, based on scattering gold nanoparticles, from a theoretical idea on paper to a working sensor system which is sensitive for specific DNA detection in the femtomolar range.

The light scattering and absorption properties of gold particles can be utilized for the detection of DNA. Binding of molecules to the gold...
Tak Shing Can (Promotion date: 30 August 2012) The entrainment of air by advancing contact lines was studied both theoretically and experimentally, by plunging a solid plate into a reservoir of viscous silicone oil of various viscosities.

Above an entrainment velocity, we observed the formation of an air film, which is unstable and subsequently decays into bubbles. During the breakup of the air film, we observed the oil reestablished the...
Alexander van Rhijn (Promotion date: 20 July 2012) This thesis describes improvements of chemical selectivity and contrast in coherent Raman scattering (CRS) spectroscopy and microscopy. CRS techniques, such as stimulated Raman scattering (SRS) and coherent anti-Stokes Raman scattering (CARS), provide chemical information of a sample based on the vibrational resonances in molecules. These resonances occur at... Ceyda Sanli (Promotion date: 6 July 2012) In this Thesis, a monolayer of macroscopic particles floating on a surface wave was studied. The liquid was pure water so that the particles are at a water-air interface. The particles are hydrophilic polystyrene spheres with average radius around 0.31 mm and they are slightly heavier than water. The surface wave was a Faraday wave, which is a wave generated at a liquid-air interface when a layer of liquid is exposed to a vertical periodic driving... Pieter Moonen (Promotion date: 4 July 2012) Aim of research has been the development of alternative lithography strategies for the fabrication of complex, flexible electronic devices. Flexible bottom-contact, bottom-gate thin-film transistors were solely patterned with UV nanoimprint lithography (NIL) on poly(ethylene naphthalate) foil... Ivo Peters (Promotion date: 29 June 2012) Reducing the area through which a fluid is allowed to flow often leads to an increase of flow velocity.

When an axisymmetric object (like a circular disc or a sphere) impacts on a water surface, a surface cavity is formed, which collapses and after pinch-off, two jets are formed: one shooting upwards and one downwards. The velocities of the jets and also of the...
Xiaofeng Sui (Promotion date: 29 June 2012) Stimuli-responsive polymers can dynamically alter their structures and properties like shape, surface characteristics, color, solubility or sol-to-gel transition on demand or in response to changes in their environment... Wen Zhang (Promotion date: 25 May 2012) This PhD thesis aims to tackle and provide insights to both conventional magnetic materials and new-generation spintronic devices, by taking advantages of the element-specificity and tunable photon energy of synchrotron-radiation-based spectroscopy and microscopy techniques, namely, X-ray magnetic circular dichroism (XMCD) and photoemission electron microscopy (PEEM)... Kim Sweers (Promotion date: 16 May 2012) In this thesis are studied: the structural and mechanical properties of amyloid fibrils formed by the human α-synuclein protein, associated with Parkinson’s disease. AFM is capable of performing both morphological and mechanical analysis on the fibrils. Especially the mechanical properties of the fibrils are becoming increasingly interesting from a nanomaterials point of view... Ruud Steenwelle (Promotion date: 11 May 2012) The successful integration of high-quality perovskite thin films with silicon, opens a pathway to create perovskite thin film devices with a large range of new functionalities. In this way piezoelectricity, superconductivity, magnetism and dielectricity can be integrated in the silicon technology and mass-production... Joost Beukers (Promotion date: 10 May 2012) Europium based ferromagnetic insulators are candidates for spintronic applications. In situ x-ray photoelectron spectroscopy is used to determine the stoichiometry of the europium oxide thin films. Based upon these measurements a growth parameter window is determined under which stoichiometric EuO is formed... Nikolay Dimov (Promotion date: 27 April 2012) Functional equivalents of the molecular, subcellular and cellular machinery that are found in insect pheromone communication serve as inspiration for this research. The microfluidic platform forms the basis for a new branch of information technology for... Josée Kleibeuker (Promotion date: 23 March 2012) The research was concentrated on complex oxide materials fabricated by pulsed laser deposition. By combining several oxide crystals in a controlled way (atomic layer by atomic layer) new materials with a combination of interesting properties could be fabricated... Mieke Luiten-Olieman (Promotion date 9 march Porous stainless steel hollow fibers were developed with outer diameter of 1000-1500 µm. The morphology of hollow fibers of stainless steel is predominantly determined during the dry-wet spinning process and can be tuned by changing the spinning conditions and the composition of the mixture. The morphology is preserved upon sintering and shrinkage due to densification. The... Muhammad Akram Raza (Promotion date 24 February 2012) Inexpensive colloidal routes were developed to fabricate functional surfaces. Precise patterning of nanoparticles, selective metallization and manufacturing of superhydrophobic surfaces were central themes.
A novel colloidal method was explored to achieve highly selective patterning of gold nanoparticles using an amazing interaction of pure water with thoil molecule...
Nur Ismail (Promotion date: 8 February 2012) Recent advances in solid-state lasers and high resolution charge-coupled devices have allowed Raman spectroscopy to emerge as a powerful tool in many applications, as for example in the fields of virology, pharmacology, forensic science, cosmetics, bioscience and nanotechnology. The goal of this research is to contribute... Mingliang Jin (Promotion date: 19 January 2012) In this thesis a new surface enhanced Raman spectroscopy (SERS) substrate is introduced, based on high density and periodic arrays of nanopyramids and nanogrooves. Using laser interference lithography an entire 100 mm diameter silicon wafer could be patterned in a single lithography step (maskless) and two etching steps. Highly uniform pyramids and grooves were presented... Fawad Khokar (Promotion date: 11 January 2012) A novel approach is investigated to the functionalization of substrates. The aim is to directly image the formation of patterns with Low Energy Electron Microscopy (LEEM), and to expose and quantify the relevant thermodynamic growth parameters. Features that are relevant to the positioning of the self-assembling entities...