Compliant and breathable magnetoelectronics: towards electronic proprioception

在我们这个信息密集型社会，增强现实小工具，如Microsoft HoloLens或Oculus Rift设备，正在变得普遍，帮助我们获取和处理数据。尽管在实现和演示方面令人印象深刻，但通常依赖光学检测系统的最先进的增强现实小工具的明显缺点是它们庞大、笨重，并且对操作员必须处于设备的视线有严格的要求。我们设想，未来的增强现实系统将依赖于兼容的皮肤互动电子设备，这还有待开发。在这个项目中，我们将开发感觉不到的皮肤上的小玩意儿，它复制了我们检测运动的自然本体感觉能力。这些新型磁敏智能皮肤的实现方式应该是，佩戴在皮肤上时不会干扰我们的日常活动。这必然意味着，未来的可成形磁电子设备不仅要符合机械要求，而且要透气，例如能够蒸发水分和输送氧气。在这方面，通常用于顺应电子领域的聚合物箔应该被超薄的类似纺织品的材料所取代。反过来，这些又应该支持高性能磁场传感器的实现。我们认为，纤维材料是实现这一目标的最合适的衬底，并实现可呼吸和高顺应性的磁场传感器。因此，作为本项目的重点目标，我们将探索在纤维材料上实现高性能磁场传感器的可能性。此外，还没有关于实现透气顺应性永磁体的数据，这是涉及顺应性磁场传感器的皮肤应用所需的。因此，我们最终的目标是开发包含透气顺应磁场传感器的整个系统，该传感器将与透气顺应磁铁一起工作。特别是，1/我们的目标是从根本上了解聚合物的化学性质、电纺垫的结构和它们的机械性能之间的关系；2/我们探索在电纺垫上实现高性能磁场传感器的可能性，这些结构在单个纤维的位置具有多孔结构；3/我们的目标是制造顺应性和透气性的永磁体，并将解决层状磁性复合材料的机械性能(稳定性、循环性能)和它们的磁性能(不仅是强度，还包括杂散场的空间对称性)之间的相互作用。

Augmented reality gadgets, e.g. Microsoft HoloLens or Oculus Rift devices are becoming common for our information intensive society assisting us to acquire and process the data. Although impressive in the realization and demonstrations, the obvious drawback of state-of-the-art augmented reality gadgets, which typically rely on optical detection systems, is their bulkiness, heaviness and the stringent requirement for an operator to be at the line of sight of the device. We envision that prospective augmented reality systems will rely on compliant on-skin interactive electronics, which is yet to be developed. In this project, we will develop haptically imperceptible on-skin gadgets, which replicate our natural proprioceptive sensory ability of detecting the motion. These novel magnetosensitive smart skins should be realized in a way not to disturb our everyday activities while worn on skin. This statement necessarily means that the prospective shapeable magnetoelectronics should become not only mechanically compliant but also breathable, e.g. enabling water evaporation and transport of oxygen. In this respect, polymeric foils, which are typically used in the field of compliant electronics, should be replaced with ultrathin textile-like materials. Those, in turn, should support the realization of high-performance magnetic field sensors. We propose that fibrous materials are the most suitable substrates to achieve this goal and realize breathable and highly compliant magnetic field sensors. Therefore, as the key objective of this project, we will explore the possibility to realize high-performance magnetic field sensors on fibrous materials. Furthermore, there is no data on the realization of breathable compliant permanent magnets, which are needed for on-skin applications involving compliant magnetic field sensors. Hence, ultimately, we aim at the development of the entire system containing breathable compliant magnetic field sensors, which will work in conjunction with breathable compliant magnets. In particular,1/ We aim to fundamentally understand the correlation between chemical nature of polymers, structure of electrospun mats and their mechanical properties;2/ We explore the possibility to realize high-performance magnetic field sensors on electrospun mats possessing porous structure with high local curvatures at the location of individual fibers;3/ We aim on the fabrication of compliant and breathable permanent magnets and will address the interplay of the mechanical properties (stability, cyclic performance) of laminated magnetic composites and their magnetic performance (not only strength but also spatial symmetry of the magnetic stray fields).