Oxidized Carbon Nanotubes (CNT) form stable adducts with ammonium ions exhibiting long alkyl chains. Outer surfaces of CNT adducts are completely covered by hydrocarbon tails, which spontaneously organize in hexagonal rotator order, with 1 hydrocarbon tail per 8 graphitic carbon atoms of the external CNT wall. Order-disorder transitions, which involve loss of packing and of zig-zag planar conformation of the bound hydrocarbon tails, occur by heating at temperatures not far from room temperature and lead to temperature-triggered dispersion in organic media of the CNT adducts. CNT adduct formation is reversible with pH changes, as clearly shown by reversible moving of CNT between apolar and polar immiscible phases.

中文翻译：

---

结合离子表面活性剂的六边形旋转器顺序和碳纳米管的温度触发分散

氧化碳纳米管 (CNT) 与具有长烷基链的铵离子形成稳定的加合物。碳纳米管加合物的外表面完全被碳氢化合物尾部覆盖，碳氢化合物尾部以六边形旋转器顺序自发组织，碳纳米管外壁的每 8 个石墨碳原子有 1 个碳氢化合物尾部。有序-无序转变，包括堆积损失和结合烃尾部的锯齿形平面构象，通过在离室温不远的温度下加热而发生，并导致 CNT 加合物在有机介质中的温度触发分散。CNT 加合物的形成随着 pH 值的变化是可逆的，正如 CNT 在非极性和极性不混溶相之间的可逆移动所清楚地表明的那样。