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Redox Control and High Conductivity of Nickel Bis(dithiolene) Complex pi-Nanosheet: A Potential Organic Two-Dimensional Topological Insulator
- Source :
- Journal of the American Chemical Society. 136(41)
- Publication Year :
- 2014
-
Abstract
- A bulk material comprising stacked nanosheets of nickel bis(dithiolene) complexes is investigated. The average oxidation number is -3/4 for each complex unit in the as-prepared sample; oxidation or reduction respectively can change this to 0 or -1. Refined electrical conductivity measurement, involving a single microflake sample being subjected to the van der Pauw method under scanning electron microscopy control, reveals a conductivity of 1.6 × 10(2) S cm(-1), which is remarkably high for a coordination polymeric material. Conductivity is also noted to modulate with the change of oxidation state. Theoretical calculation and photoelectron emission spectroscopy reveal the stacked nanosheets to have a metallic nature. This work provides a foothold for the development of the first organic-based two-dimensional topological insulator, which will require the precise control of the oxidation state in the single-layer nickel bisdithiolene complex nanosheet (cf. Liu, F. et al. Nano Lett. 2013, 13, 2842).
- Subjects :
- Inorganic chemistry
chemistry.chemical_element
General Chemistry
Conductivity
Biochemistry
Catalysis
Metal
Nickel
Colloid and Surface Chemistry
Van der Pauw method
chemistry
Electrical resistivity and conductivity
Oxidation state
visual_art
Topological insulator
visual_art.visual_art_medium
Physical chemistry
Nanosheet
Subjects
Details
- ISSN :
- 15205126
- Volume :
- 136
- Issue :
- 41
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....20db10e0c29a02c02dbd3d3f4f1b13bf