Figure 1.

Mass-to-charge-ratio spectra of the DNA- and RNA-functionalized SWCNTs measured by TOF-SIMS. The DNA-functionalized SWCNTs shows four peaks C, T, A, and G (a) whereas the RNA-functionalized SWCNTs show four peaks C, U, A, and G (b). The peak positions of the ionized nucleotides are as follows: C (C4H4N3O-, Cyt-H) at 110.03, U (C4H3N2O2-, Ura-H) at 111.02, T (C5H5N2O2-, Thy-H) at 125.03, A (C5H4N5-, Ade-H) 134.04, and G (C5H4N5O-, Gua-H) at 150.04.

Kim et al. Nanoscale Research Letters 2014 9:85   doi:10.1186/1556-276X-9-85
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