Institute of Solid State Physics

## Solid State Seminar - Winter 2022

 Wednesday 05 October 2022      PH1150 11:15 - 12:15 Thin films for smart sensors and beyondAnna Maria Coclite Stimuli-responsive materials are characterized by dynamic switching of their properties depending on external stimuli (e.g. light, pH, temperature, humidity). In particular, hydrogels change their size and shape when exposed to aqueous environments. Functional and responsive surf ... more Wednesday 12 October 2022      PH1150 11:15 - 12:15 Optimize Surface Polymorph Growth with Optimal Control TechniquesSimon Hollwegerhttps://tugraz.webex.com/tugraz/j.php?MTID=md7fb03441eb728c4dbde88ff2a0f3fb2 Organic molecules adsorbed on inorganic surfaces can form a huge number of different structures on the surface so called polymorphs. These polymorphs have different properties. Which polymorph is formed depends mostly on external parameters like temperature and pressure. To achi ... more Wednesday 19 October 2022      PH1150 11:15 - 12:15 Electro-optical Characterization of Point Defects in Si, SiC and GaN DevicesMarike van Orden https://tugraz.webex.com/tugraz/j.php?MTID=md7fb03441eb728c4dbde88ff2a0f3fb2 Charge carriers flowing through the channel of a MOSFET can get trapped in the bulk or at the SiC/SiO$_2$ interface and affect the device performance. These trap levels have their origin in the different crystal structures of SiC and SiO$_2$ which lead to a lattice mismatch. If t ... more Wednesday 02 November 2022      PH1150 11:15 - 12:15 Holiday--- Wednesday 09 November 2022      PH1150 11:15 - 12:15 Transfer learning on organic/inorganic interfaces for different substrates Elias Fösleitnerhttps://tugraz.webex.com/tugraz/j.php?MTID=md7fb03441eb728c4dbde88ff2a0f3fb2 Performing structure search of organic molecules on metallic surfaces requires finding the structure with the smallest energy. Using conventional density functional codes this proves to be a time consuming task since the number of possible configurations is large and individual c ... more Wednesday 16 November 2022      PH1150 11:15 - 12:15 Deposition of Multi-Stimuli-Responsive Sensors and Study of their Response Range to TemperatureSophie Marcelja Thin hydrogel double layers (100 nm each) were deposited under varying conditions on plain Silicon, as well as nano-patterned substrates using initiated chemical vapor deposition. The resulting structure is a sensor responsive to multiple stimuli which are temperature, humidity a ... more Wednesday 23 November 2022      ph1150 11:15 - 12:15 Polymorph screening on surfaces applied to anthraquinone Fabian Gasser Polymorphism describes the existence of crystals with different structures but the same molecular composition. In order to find new polymorphs a method called polymorph screening is well established in pharmaceutics. For this work the procedure of polymorph screening was adapted ... more Wednesday 30 November 2022      PH1150 11:15 - 12:15 Development of a Climate chamber for In-Situ μ-CT measurements of Paper samples in a humid environmentMaximilian Grillitsch Ongoing research in the μ-CT Lab at TU Graz tries to find out where water can impinge in a paper sample. This research led to the follow up question of how paper behaves under the influence of humidity. To realize measurements of paper under the influence of humidity the f ... more Wednesday 07 December 2022      PH1150 11:15 - 12:15 Microfabrication building blocks towards high frequency resonators for 5G RF filters applicationsTamara Terzic , SAL-Villach Increasing usage of mobile wireless traffic, and thus an increasing amount of Radio Frequency (RF) filters has led to a growing demand of surface acoustic wave (SAW) and bulk acoustic wave (BAW) devices. Recently, hybrid quasi-SAW/BAW resonators were reported, that show high pote ... more Wednesday 14 December 2022 11:15 - 12:15 Fiber optics enabled 2D multiparametrical battery cell sensingChristoph Mühlederhttps://tugraz.webex.com/tugraz/j.php?MTID=md7fb03441eb728c4dbde88ff2a0f3fb2 In order to further accelerate development and increase functional safety, quality and reliability of lithium-ion batteries, new ways for real-time, multidimensional, in-operando monitoring of batteries are looked for. In this work, the combination of Fiber Bragg Gratings (FBG) i ... more Wednesday 11 January 2023      ph01150 11:15 - 12:15 Evaluating nanoscale contact and adhesion using FRET microscopyUlrich Hirn, M. Gaspar-Simoes. G. Urstöger, R. Schennach Several intermolecular mechanisms are responsible for adhesion: hydrogen bonding, van der Waals forces and electrostatic interaction. Among these mechanisms hydrogen bonding and van der Waals attraction only work if molecular contact -- i.e. a distance between surfaces below a fe ... more Wednesday 18 January 2023      PH 01 150 11:15 - 12:15 Novel Approach to measure Fluoride in Fuel Cell Exhaust WaterMario Steiner, AVLhttps://tugraz.webex.com/tugraz/j.php?MTID=md7fb03441eb728c4dbde88ff2a0f3fb2 Fuel cells are a promising technologie so solve the energy problematics of the future and a potential candidate as a new engine technologie in the transport sector. Currently the production costs and their limited lifetime prevents them from wolrdwide application. The fuel cell i ... more Wednesday 25 January 2023      PH01150 11:15 - 12:15 Early life failure mechanisms detection in power MOSFETs by means of thermal burn-inJürgen Paust One of the key challenges for manufacturers is the reliability of the ICs when built into the customer’s application. Therefore, the semiconductor devices integrated in these ICs, need to work exactly as supposed to. A more prominent effect in this context is the so-called bathtu ... more