› › 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

Page : 182 pages

File Size : 49,87 MB

Release : 2018-08-29

Category :

ISBN : 3731508168

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Book Description

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.



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

Author : Felix Vüllers

Publisher :

Page : 170 pages

File Size : 29,84 MB

Release : 2020-10-09

Category : Transportation

ISBN : 9781013279003

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Book Description

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. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.



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

Author : Davoodi, Hossein

Publisher : KIT Scientific Publishing

Page : 238 pages

File Size : 17,79 MB

Release : 2022-01-14

Category : Technology & Engineering

ISBN : 3731511185

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Book Description

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

Author : Nassar, Omar

Publisher : KIT Scientific Publishing

Page : 278 pages

File Size : 40,29 MB

Release : 2023-08-15

Category :

ISBN : 3731511762

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Book Description

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).



Photon upconversion heterostructures made from surface-anchored metal-organic frameworks

Author : Oldenburg, Michael

Publisher : KIT Scientific Publishing

Page : 182 pages

File Size : 13,23 MB

Release : 2019-01-22

Category : Heterostructures

ISBN : 373150863X

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Book Description

This work deals with the process of photon upconversion in surface-anchored metal-organic frameworks. During the upconversion, two low-energy photons are absorbed and fused into a higher-energy photon, which is emitted. In this work, this process is analyzed in surface-bound metal-organic frameworks by spectroscopic methods. Furthermore, the application for increasing the efficiency of solar cells is discussed.



Advanced Elastocaloric Cooling Devices Based on Shape Memory Alloy Films

Author : Brüderlin, Florian

Publisher : KIT Scientific Publishing

Page : 292 pages

File Size : 35,35 MB

Release : 2022-11-15

Category : Technology & Engineering

ISBN : 3731510650

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Book Description

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.



In Situ Characterization and Modelling of Drying Dynamics for Scalable Printing of Hybrid Perovskite Photovoltaics

Author : Ternes, Simon

Publisher : KIT Scientific Publishing

Page : 302 pages

File Size : 20,3 MB

Release : 2023-03-27

Category : Technology & Engineering

ISBN : 3731512556

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Book Description

Hybrid perovskite photovoltaics could play a vital role in future’s renewable energy production. However, there are still severe challenges when scaling the technology. In this work, perovskite solution films drying in laminar and slot-jet air flows are investigated extensively by optical in situ characterization. The main results are a quantitative model of perovskite drying dynamics and a novel in situ imaging technique – yielding valuable predictions for large-scale perovskite fabrication.



Power Generation by Resonant Self-Actuation

Author : Joseph, Joel

Publisher : KIT Scientific Publishing

Page : 288 pages

File Size : 37,61 MB

Release : 2023-12-28

Category :

ISBN : 3731513277

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Book Description

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.



Wetting and Wettability

Author : Mahmood Aliofkhazraei

Publisher : BoD – Books on Demand

Page : 386 pages

File Size : 11,2 MB

Release : 2015-12-16

Category : Science

ISBN : 9535122150

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Book Description

On the liquid 's surface, the molecules have fewer neighbors in comparison with the bulk volume. As a result, the energy interaction shows itself in the surface tension. Traditionally, the surface tension can be assumed as a force in the unit of the length which can be counted by the unit of Newton on squared meter, or energy on the units of the surface. The surface tension, implies the interface between liquid and vapor, which is an example of the surface tensions. The equilibrium between these surface tensions, decides that a droplet on a solid surface, would have a droplet form or will change to layer form. This book collects new developments in wetting and wettability science.



Superhydrophobic Surfaces

Author : Mehdi Khodaei

Publisher : Intechopen

Page : 132 pages

File Size : 44,71 MB

Release : 2020-07

Category : Science

ISBN : 1838805974

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Book Description

During the past decade, the superhydrophobic surfaces, bio-inspired non-wettable surfaces, have aroused worldwide interest. The super water-repellant surface has special characteristics such as low surface energy as well as hierarchical micro/nano surface roughness. These surfaces have many practical applications, from industrial to biomedical applications, including water/oil separation, self-cleaning, drag reduction, anti-fogging, anti-bacterial, anti-fouling, anti-icing, corrosion resistance, as well as many applications in industries such as marine, oil, and gas, aerospace, biomedicine etc. This book presents knowledge on the field of application of superhydrophobic surfaces. Superhydrophobicity has become a hot topic in the academics as well as industries in different engineering and biomedicine research fields.