9:30 – 15:00 |  TBA

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Circular economy is relevant in all aspects of society and cover a wide range of focus areas. In this open seminar, circular economy will focus on the importance of rethinking the use of materials. How do we ensure the most optimal use and reuse of materials in the industry and how can fundamental research projects add to this agenda. For this seminar, we have invited both industries already employing circular economy as part of their business model and decision makers to give their view on the topic.

Participation in the seminar is free, but registration required.

11:15 – 12:00 |  Auditorium VI, Department of Chemistry, Langelandsgade 140, 8000 Aarhus

By Stephan Hofmann, Department of Engineering, University of Cambridge, United Kingdom
With a focus on diverse applications in the electronics and display industry, we aim at developing integrated process technology for nanomaterials, like semiconducting nanowires, 2D materials and their heterostructures [1]. In order to go beyond empirical process calibrations, we systematically use in-situ metrology to reveal the mechanisms that govern the growth, interfaces and device behaviour of these nanomaterials in realistic process environments. I will review our recent progress in scalable CVD [1] and device integration approaches of highly crystalline graphene and hexagonal boron nitride (h-BN) films [2,3]. We systematically explored also the parameter space of atomic layer deposition (ALD) of ultrathin oxides on 2D materials [4] and as we show, these results have model system character for rational 2D/non-2D material process integration [5]. The talk will also cover our recent results [6-8] on group IV and III-V nanowire growth, revealing some of the fundamental growth mechanisms and highlighting the use of these structures as model systems to explore generic aspects of phase behaviour, nucleation and interface dynamics in nanoscale systems.

 [1] Hofmann et al., J. Phys. Chem. Lett. 6, 2714 (2015); [2] Weatherup et al., Nano Lett. 16, 6196 (2016); [3] Caneva et al. Nano Lett. 16, 1250 (2016); [4] Aria et al. ACS Appl. Mater. Interfaces 8, 30564 (2016); [5] Alexander-Webber et al., 2D Mater. 4, 011008 (2016); [6] Panciera et al., Nature Materials 14, 820 (2015); [7] Jacobsson et al. Nature 531, 317 (2016); [8] Panciera et al. Nature Comm. 7, 12271 (2016).

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