Electrical conductivity in a non-covalent two-dimensional porous organic material with high crystallinity
[1];
[2]
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan 430081, China
- Department of Chemistry, Columbia University, New York, USA
- Department of Physics, Columbia University, New York, USA
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, USA
Electroactive macrocycle building blocks are a promising route to new types of functional two-dimensional porous organic frameworks. Our strategy uses conjugated macrocycles that organize into two dimensional porous sheets via non-covalent van der Waals interactions, to make ultrathin films that are just one molecule thick. In bulk, these two-dimensional (2D) sheets stack into a three-dimensional van der Waals crystal, where relatively weak alkyl–alkyl interactions constitute the interface between these sheets. With the liquid-phase exfoliation, we are able to obtain films as thin as two molecular layers. Further using a combination of liquid-phase and mechanical exfoliation, we are able to create non-covalent sheets over a large area (>100 mm2 ). The ultrathin porous films maintain the single crystal packing from the macrocyclic structure and are electrically conductive. We demonstrate that this new type of 2D noncovalent porous organic framework can be used as the active layer in a field effect transistor device with graphene source and drain contacts along with hexagonal boron nitride as the gate dielectric interface.
- Research Organization:
- Columbia Univ., New York, NY (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- SC0019440
- OSTI ID:
- 1759163
- Alternate ID(s):
- OSTI ID: 1816704; OSTI ID: 2202960
- Journal Information:
- Chemical Science, Journal Name: Chemical Science Vol. 12 Journal Issue: 8; ISSN 2041-6520
- Publisher:
- Royal Society of Chemistry (RSC)Copyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
Similar Records
Electronically Coupled 2D Polymer/MoS2 Heterostructures
Influence of Pore Size on the van der Waals Interaction in Two-Dimensional Molecules and Materials