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Hexahapto-lanthanide interconnects between the conjugated surfaces of single-walled carbon nanotubesWe report the response of the electrical conductivity of semiconducting single-walled carbon nanotube (SWNT) thin films on exposure to metal vapors of the early lanthanides under high vacuum conditions. We attribute the strongly enhanced conductivities observed on deposition of samarium and europium to charge transfer from the metals to the SWNT backbone, thereby leading to the first examples of mixed covalent–ionic bis-hexahapto bonds [(η 6 -SWNT)M(η 6 -SWNT), where M = Sm, Eu].more » « less
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