Magnetoresistive and Thermoresistive Scanning Probe Microscopy with Applications in Micro- and Nanotechnology
Magnetoresistive and Thermoresistive Scanning Probe Microscopy with Applications in Micro- and Nanotechnology

Author: Meier, Tobias

Publisher: KIT Scientific Publishing

Published: 2014-10-02

Total Pages: 192

ISBN-13: 3731502534

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This work presents approaches to extend limits of scanning probe microscopy techniques towards more versatile instruments using integrated sensor concepts. For structural surface analysis, magnetoresistive sensing is introduced and thermoresistive sensing is applied to study nanoscale phonon transport in chain-like molecules. Investigating with these techniques the properties of shape memory polymers, a fabrication method to design application-inspired micro- and nanostructures is introduced.

Micro- and Nanostructured Microfluidic Devices for Localized Protein Immobilization and Other Biomedical Applications
Micro- and Nanostructured Microfluidic Devices for Localized Protein Immobilization and Other Biomedical Applications

Author: Steidle, Nicole E.

Publisher: KIT Scientific Publishing

Published: 2014-12-23

Total Pages: 166

ISBN-13: 3731502976

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A new immobilization method for the localized adsorption of proteins on thermoplastic surfaces is introduced. Artificial three-phase interfaces were realized by surface structuring to control the wetting behavior which lead to a preferred adsorption in these modified areas. Additionally, different fabrication methods were analyzed to determine mass fabrication capabilities. These fabrication methods also allowed the production of fully structured microchannels to tune the fluids behavior within.

NMR micro-detectors tailored for multinuclear and electrochemistry lab-on-a-chip applications
NMR micro-detectors tailored for multinuclear and electrochemistry lab-on-a-chip applications

Author: Davoodi, Hossein

Publisher: KIT Scientific Publishing

Published: 2022-01-14

Total Pages: 238

ISBN-13: 3731511185

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This work offers three solutions tailored to specific applications to overcome NMR challenges in the micro-domain. As the first sub-topic of this work, different potential electrode designs, compatible with NMR technique, are suggested and experimentally evaluated. As the second focus point, this work tackles multinuclear detection challenges. In parallel, a low-cost, broadband insert is discussed to enhance the sensitivity of standard NMR coils when a small sample volume is available.

Innovative micro-NMR/MRI functionality utilizing flexible electronics and control systems
Innovative micro-NMR/MRI functionality utilizing flexible electronics and control systems

Author: Nassar, Omar

Publisher: KIT Scientific Publishing

Published: 2023-08-15

Total Pages: 278

ISBN-13: 3731511762

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The advantages offered by the flexible electronics and control systems technologies were utilized for tackling the challenges facing two crucial Magnetic Resonance (MR) applications. The first application is in the field of interventional Magnetic Resonance Imaging (MRI), and the other application is in the field of Nuclear Magnetic Resonance spectroscopy (NMR).

Bioinspired Superhydrophobic Nano- and Microstructured Surfaces for Drag Reduction and Optoelectronics
Bioinspired Superhydrophobic Nano- and Microstructured Surfaces for Drag Reduction and Optoelectronics

Author: Felix Vüllers

Publisher: KIT Scientific Publishing

Published: 2018-08-29

Total Pages: 182

ISBN-13: 3731508168

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Inspired by superhydrophobic leaves of water plants, a flexible superhydrophobic self-cleaning, transparent thin polymeric nanofur film was fabricated through highly scalable hot embossing and hot pulling techniques. Nanofur can retain an air film underwater, whose stability against external stimuli such as high pressure and movement through fluids is investigated. Additionally, the optical properties of nanofur are investigated and exploited to enhance the efficiency of optoelectronic devices.

Novel MRI Technologies for Structural and Functional Imaging of Tissues with Ultra-short T₂ Values
Novel MRI Technologies for Structural and Functional Imaging of Tissues with Ultra-short T₂ Values

Author: Oezen, Ali Caglar

Publisher: KIT Scientific Publishing

Published: 2017-06-30

Total Pages: 266

ISBN-13: 3731506572

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Conventional MRI has several limitations such as long scan durations, motion artifacts, very loud acoustic noise, signal loss due to short relaxation times, and RF induced heating of electrically conducting objects. The goals of this work are to evaluate and improve the state-of-the-art methods for MRI of tissue with short T?, to prove the feasibility of in vivo Concurrent Excitation and Acquisition, and to introduce simultaneous electroglottography measurement during functional lung MRI.

Development of an Electrochemical Biosensor Platform and a Suitable Low-Impedance Surface Modification Strategy
Development of an Electrochemical Biosensor Platform and a Suitable Low-Impedance Surface Modification Strategy

Author: Pires Carneiro, Leonardo

Publisher: KIT Scientific Publishing

Published: 2014-11-17

Total Pages: 182

ISBN-13: 3731502720

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In this work, a flexible biosensor platform based on impedance spectroscopy and comprising of gold electrodes, polymeric flow cells and a suitable surface modification were developed. Initially, several surface modification techniques described in literature were implemented and optimized for impedimetric biosensors but their individual limitations rendered them unsuitable for this biosensor platform. A novel method based on photobleaching was developed and tested showing satisfactory results.

Power Generation by Resonant Self-Actuation
Power Generation by Resonant Self-Actuation

Author: Joseph, Joel

Publisher: KIT Scientific Publishing

Published: 2023-12-28

Total Pages: 288

ISBN-13: 3731513277

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Die Forschung im Bereich der Mikro-Energiegewinnungssysteme wurde durch den Bedarf an autarken, stabilen Energiequellen für vernetzte drahtlose Sensoren vorangetrieben. Abwärme, insbesondere bei Temperaturen unter 200 °C, stellt eine vielversprechende, aber mit den derzeitigen Umwandlungstechnologien schwer zu gewinnende Energiequelle dar. - Research into micro energy harvesting systems has been driven by the need for self-sustaining, stable power sources for interconnected wireless sensors. Waste heat, particularly at temperatures below 200 °C, presents a promising but challenging energy source to recover using current conversion technology.

Advanced Elastocaloric Cooling Devices Based on Shape Memory Alloy Films
Advanced Elastocaloric Cooling Devices Based on Shape Memory Alloy Films

Author: Brüderlin, Florian

Publisher: KIT Scientific Publishing

Published: 2022-11-15

Total Pages: 292

ISBN-13: 3731510650

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Elastocaloric cooling is an emerging solid-state cooling technology with the potential to provide environmentally friendly, efficient cooling. The elastocaloric effect in superelastic shape memory alloy films is used to develop advanced cooling devices for small-scale applications. Cascaded and parallelized devices are developed to increase device temperature span and cooling capacity. The concepts are proven experimentally, a maximum temperature span of 27° C is achieved in a cascaded device.