Figure 1

${}^{13}\mathrm{C}$ NMR spectra $({\omega }_0=50.3\mathrm{MHz})$ at room temperature of pristine SWNT (Ref. 9) (a) and ${\mathrm{LiC}}_x$ intercalated compounds with $x=10$, 7, and 6 [(b), (c), and (d), respectively]. On the left side, the static ${}^{13}\mathrm{C}$ NMR spectra are presented and on the right side the high-resolution ${}^{13}\mathrm{C}$ MAS NMR spectra. The symbols $\star$ are for the spinning sidebands. Spinning rates are about $9\mathrm{kHz}$ in (a′) and $4\mathrm{kHz}$ in (b′), (c′), and (d′).Reuse & Permissions

Figure 2

Temperature-dependent ${}^{13}\mathrm{C}$ NMR spin lattice relaxation rates $({\omega }_0=50.3\mathrm{MHz})$ for ${\mathrm{LiC}}_{10}$: $\star$, ${\mathrm{LiC}}_7$: $엯$, and ${\mathrm{LiC}}_6$: $∎$. Inset: ${}^{13}\mathrm{C}$ NMR magnetization recovery at room temperature for ${\mathrm{LiC}}_6$:$엯$ and pristine SWNT: $∎$ (Ref. 9).Reuse & Permissions

Figure 3

Temperature-dependent ${}^7\mathrm{Li}$ NMR spin lattice relaxation rate $1∕T^{\alpha }$ $(▴)$ and $1∕T^{\beta }$ $(\circ )$ of ${\mathrm{LiC}}_{10}$ at a Larmor frequency of ${\omega }_0=100\mathrm{MHz}$. The dotted line is a fit according to Eq. (4). The dashed line is a fit assuming a Korringa relaxation process. Inset: ${}^7\mathrm{Li}$ NMR spectra in ${\mathrm{LiC}}_{10}$ at $50\mathrm{K}$ extracted from magnetization recovery experiments: (a) partially recovered spectrum at a short delay, $0.8\mathrm{s}$ and (b) fully relaxed spectrum at a long delay, $22\mathrm{s}$. The ratios in (a) [$\alpha :37\%$, $\beta :63\%$] and in (b) [$\alpha :70\%$, $\beta :30\%$] are obtained from a deconvolution with one sharp-$\alpha$ (dotted line) and one broad-$\beta$ (dashed line) quadrupolar shaped line as described in the text.Reuse & Permissions