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We report on the lowest temperature of SWCNT growth using endothermic decomposition of CH4 gas on a specially activated alumina-supported Fe:Mo catalyst. However, the observed lowest growth temperature (560 °C) is higher than that reported previously for exothermic feedstock type. Our observation indicates that the decomposition threshold temperature of the feedstock limits the SWCNT growth. This study also suggests that, by using more active carbon feedstock or somehow facilitating its decomposition, one could enable the synthesis of SWCNT at an even lower temperature.

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We report the polarized infrared reflectance spectra, optical conductivity, and electronic band structure of metallic β′′-(ET) 2 SF 5 CHFSO 3 and compare our results with those of the β′′-(ET) 2 SF 5 CH 2 CF 2 SO 3 superconductor and the β′′-(ET) 2 SF 5 CHFCF 2 SO 3 metal/insulator material. We discuss the electronic structure of these organic molecular solids in terms of band structure, many-body effects, and disorder. On the basis of spectral similarities between the superconductor and metallic salts and structural differences in the anion pocket of all three, we conclude that the unusual electronic excitations observed in the β′′-(ET) 2 SF 5 -CHFCF 2 SO 3 metal/insulator material are not caused by electron correlation but are due to disorder-related localization.