Substrate induced modulation of physical and chemical properties of quasi two-dimensional nanostructures

量子物理学・ナノサイエンス第170回セミナー

概要

In the post-Graphene era, several quasi two-dimensional nanostructures have been grown epitaxially on metallic or semiconducting substrates, resulting in heterojunctions with interesting application potential. Physical and chemical properties of such overlayers often get modulated by the sub-surface layers of the corresponding substrates, leading to manifestation of new properties. In this talk, I shall discuss how density functional theory (DFT) based first principles approach can be used for a microscopic understanding of these interface induced effects. Such phenomena depend crucially on the exact geometry of the interface, which in turn is self-consistently inter-twinned with its electronic structure. I shall illustrate this with some case studies on applications ranging from catalysts for CO oxidation to modulation of electronic properties in devices [1-4].

1. 1.A. Bhattacharya et al,Appl. Phys. Lett. 103, 123113 (2013).
2. 2.A.H.M. Abdul Wasey et al, ACS Appl. Mater. Interfaces 5, 10404 (2013).
3. 3.A.H.M. Abdul Wasey et al, AIP Advances 4, 047107 (2014).
4. 4.P. Banerjee et al, Appl. Surf. Sci. (2016), in press.

• 量子物理学・ナノサイエンス第170回セミナー

• ナノサイエンス・量子物理学国際研究センター 主催
• 東京工業大学理学院・物理学系、「ナノサイエンスを拓く量子物理学拠点」共催