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    Funktionalisierte Aerogele für thermoakustische Emission
    Air-coupled ultrasonic transducers have been increasingly applied to enable contact-free ultrasonic testing in several industrial branches. In particular, they are used for testing lightweight components and thus contribute to the reduction of pollutant emissions, technical safety and the circular economy. The current ultrasonic transducers are however very much restricted by the difficulties of overcoming impedance mismatch between air and the piezocomposite. A new generation of ultrasonic transducers could be based on the thermoacoustic effect. Although theoretical estimations show that the thermoacoustic effect can be potentially utilized to create very efficient acoustic transducers, the sound pressure levels of existing prototypes are far away from the commercial ones. In this project, we intend to demonstrate the giant thermoacoustic effect required for creation of high-performance thermoacoustic transmitters. The principal goal lies in developing a new class of aerogel-based substrates with exceptionally low thermal effusivity. To achieve this goal, a toolbox of nano-scaled approaches for tailoring the internal structure, surface morphology and chemistry of aerogels will be developed. These approaches are of general use and can principally be applied to any open porous materials. Practical outcomes of the project would enable testing of thicker components and materials with high acoustic damping. The results would also enable miniaturization of both ultrasonic sources and the electrical matching network, broadening the application area of air-coupled ultrasonic testing.
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    EXC 3120 BlueMat - Research Topic A4: Bioinspired and Modeling-Guided Nanoporous Device Concepts
    3D hybrid nanomaterial systems developed in A1 to A3 exhibit a variety of water-driven functionalities, including electrochemo-mechanical coupling that enables an active control of acoustic properties (A1, A2), sensing and actuation (A2, A3), and transfer of large actuation energies in metal/polymer/water hybrid nanomaterials (A2, A3) that can be tuned via an external chemical or physical stimulus. By integrating these systems in A4, we aim to achieve applications with high flexibility and even free programmability. Inspiration from biological principles and advanced modeling approaches serve as sources for creativity and innovation, providing a theoretical proof of concept. Key scientific questions include: How can we translate concepts from biology, such as autonomous sensing and versatile shape change, into technological systems? How can we independently control defined material volumes within a material system via an external stimulus? How can we predict the macroscopic behavior of such multiscale systems to identify the most promising designs?
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    EXC 3120 BlueMat - Cross Area Data
    The CA Data is dedicated to the comprehensive management of research data, facilitating seamless interactions across and within the various RAs of BlueMat and beyond (see Sect. 5.3 on Research Data Management (RDM)). CA Data aims to establish a robust infrastructure, provide essential tools, and host RDM experts to ensure a sustainable data lifecycle, encompassing data from both experiments and simulations.
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