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Proposed Modification of the Graphene Analogue Ni-3(HITP)(2) To Yield a Semiconducting Material
Journal article   Open access

Proposed Modification of the Graphene Analogue Ni-3(HITP)(2) To Yield a Semiconducting Material

Michael E. Foster, Karl Sohlberg, Catalin D. Spataru and Mark D. Allendorf
Journal of physical chemistry. C, v 120(27), pp 15001-15008
14 Jul 2016
url
https://www.osti.gov/biblio/1252693View

Abstract

Chemistry Chemistry, Physical Materials Science Materials Science, Multidisciplinary Nanoscience & Nanotechnology Physical Sciences Science & Technology Science & Technology - Other Topics Technology
The metal organic framework material Ni-3(2,3,6,7,10,11-hexaiminotriphenylene)(2) (Ni-3(HITP)(2)) is composed of layers of extended conjugated planes analogous to graphene. We carried out density functional theory (DFT) calculations to model the electronic structure of monolayer, bilayer, and bulk Ni-3(HITP)(2). These materials have intriguing electronic properties; for example, appreciable band dispersion is predicted not only in plane but also perpendicular to the stacking planes. This suggests that, unlike graphene, the material may have appreciable conductivity in all crystallographic directions. Moreover, the bulk and bilayer structures are predicted to be metallic; in contrast, a 2D monolayer of the material exhibits a band gap. Insight obtained from studies of the transition of the material from semiconducting to metallic as the dimensionality increases from 2D to 3D suggests the possibility of producing a 3D semiconducting material by inserting spacer moieties between the layers. Our calculations suggest that it is not energetically favorable for Ni-3(HITP)(2) to accept a spacer linker (i.e., pyridine); however, changing the coordinating metal to Cr makes spacer insertion energetically favorable. The proposed 3D material is predicted to possess a band gap of similar to 1 eV with electron/hole effective masses similar to that of silicon.

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Collaboration types
Domestic collaboration
Web of Science research areas
Chemistry, Physical
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
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