Send to

Choose Destination
Nano Lett. 2014 Jul 9;14(7):3930-7. doi: 10.1021/nl501212u. Epub 2014 Jun 3.

Effect of atomic interconnects on percolation in single-walled carbon nanotube thin film networks.

Author information

Department of Chemical Engineering, University of California , Riverside, California 92521, United States.


The formation of covalent bonds to single-walled carbon nanotube (SWNT) or graphene surfaces usually leads to a decrease in the electrical conductivity and mobility as a result of the structural rehybridization of the functionalized carbon atoms from sp(2) to sp(3). In the present study, we explore the effect of metal deposition on semiconducting (SC-) and metallic (MT-) SWNT thin films in the vicinity of the percolation threshold and we are able to clearly delineate the effects of weak physisorption, ionic chemisorption with charge transfer, and covalent hexahapto (η(6)) chemisorption on these percolating networks. The results support the idea that for those metals capable of forming bis-hexahapto-bonds, the generation of covalent (η(6)-SWNT)M(η(6)-SWNT) interconnects provides a conducting pathway in the SWNT films and establishes the transition metal bis-hexahapto organometallic bond as an electronically conjugating linkage between graphene surfaces.


Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center