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Open Science iMAT Lecture
14. December 2018 @ 11:15 - 12:00
Integrated Crystal Growth of Advanced Nanomaterials:
From model systems to integrated manufacturing
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 . 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  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  and as we show, these results have model system character for rational 2D/non-2D material process integration . 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.
 Hofmann et al., J. Phys. Chem. Lett. 6, 2714 (2015);  Weatherup et al., Nano Lett. 16, 6196 (2016);  Caneva et al. Nano Lett. 16, 1250 (2016);  Aria et al. ACS Appl. Mater. Interfaces 8, 30564 (2016);  Alexander-Webber et al., 2D Mater. 4, 011008 (2016);  Panciera et al., Nature Materials 14, 820 (2015);  Jacobsson et al. Nature 531, 317 (2016);  Panciera et al. Nature Comm. 7, 12271 (2016).
Prof Stephan Hofmann – Biosketch
Stephan Hofmann is Professor of Nanotechnology at the Engineering Department of the University of Cambridge, where he heads a group and large research effort on advanced nanomaterials and their device integration. He holds degrees from the Technische Universität München and the University of Cambridge. He is the recipient of an ERC Starting Independent Researcher Grant, leads large grants/consortium on CVD enabled 2D Material Technology and is co-director of the Doctoral Training Centre in Nanotechnology. Among his awards is the 2014 ACS Journal of Physical Chemistry C Lectureship.
AUD VI 14.12. kl. 11:15-12