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Liquid anhydrous sulfuric acid forms a partly ordered structure in the presence of single-walled carbon nanotubes (SWNTs). X-ray scattering from aligned fibers immersed in acid shows the formation of molecular shells wrapped around SWNTs. Differential scanning calorimetry of SWNT-acid suspensions exhibits concentration-dependent supercooling/melting behavior, confirming that the partly ordered molecules are a new phase. We propose that charge transfer between nanotube π electrons and highly oxidizing superacid is responsible for the unique partly ordered structure.
Zhou, W., Fischer, J. E., Heiney, P. A., Fan, H., Davis, V. A., Pasquali, M., & Smalley, R. E. (2005). Single-walled carbon nanotubes in superacid: X-ray and calorimetric evidence for partly ordered H2SO4. Retrieved from http://repository.upenn.edu/mse_papers/65
Date Posted: 31 July 2005
This document has been peer reviewed.