Seminar
Date | 2016-05-31 |
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■ Topic : Low-dimensional Group-IV Nanomaterials
■ Speaker : Prof. Dongmok Whang, (School of AMSE, Sungkyunkwan Univ.)
■ Invitation : Prof. Kim, Sang-Ouk
■ Date & Time : May 31 (Tue) 16:00
■ Venue : KAIST Applied Engineering B/D(W1), Multimedia Lecture Hall (1st Floor)
■ Abstract : Low-dimensional nanomaterials of group-IV materials, including, Si, Ge, C, and their alloy and heterostructures has been grown by chemical vapor deposition (CVD) using metal catalyst. Here
we present our recent efforts for the metal-free growth of 0D, 1D, and 2D nanostructures of the group-IV materials and their possible applications. In particular, we will focus on the growth of monolayer
graphene on hydrogen-terminated germanium (Ge) surface with controlled crystallinity. A Ge substrate is a promising candidate for the growth of single-crystal graphene, because of (i) its catalytic
activity for the catalytic decomposition of the formation of graphitic carbon on the surface; (ii) the extremely low solubility of carbon in Ge even at its melting temperature, enabling growth of complete
monolayer graphene; (iii) the anisotropic atomic arrangement of single crystal Ge surface, enabling wafer-scale growth of single-crystal graphene; (iv) the availability of a large area single-crystal surface
via epitaxial Ge growth on Si wafers.