Potentials of classical force fields for interactions between Na<sup>+</sup> and carbon nanotubes<xref rid="cpb_27_9_098801_fn1" ref-type="fn">*</xref><fn id="cpb_27_9_098801_fn1"><label>*</label><p>Project supported by the National Science Fund for Outstanding Young Scholars of China (Grant No. 11722548) and the National Natural Science Foundation of China (Grant Nos. 11574339 and 11404361).</p></fn>

Potentials of classical force fields for interactions between Na⁺ and carbon nanotubes**

Project supported by the National Science Fund for Outstanding Young Scholars of China (Grant No. 11722548) and the National Natural Science Foundation of China (Grant Nos. 11574339 and 11404361).

Li De-Yuan^{1, 2}, Shi Guo-Sheng^{1, 2, †}, Hong Feng^{1, ‡}, Fang Hai-Ping^{1, 2}

(color online) (a)–(d) Adsorption energies and curve fits for Na⁺ with (7,7), (8,8), (9,9), and (10,10)-type CNTs, respectively.