Jeon Sang-Woo, Do Changwoo, Moon Se Youn, Kim Tae-Hwan
Department of Applied Plasma & Quantum Beam Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea.
Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea.
ACS Cent Sci. 2025 May 22;11(6):950-959. doi: 10.1021/acscentsci.5c00548. eCollection 2025 Jun 25.
For a wide range of practical applications of boron nitride nanotubes (BNNTs), it is essential to achieve their highly ordered self-assembled structures. This study reports on a two-dimensional (2D) binary superlattice of individually exfoliated BNNTs with a negative surface charge (p-BNNT25) and cationic surfactant vesicles (CTAT/SDBS vesicles, prepared by mixing cetyltrimethylammonium tosylate (CTAT) and sodium dodecylbenzenesulfonate (SDBS)) complexes through electrostatic interactions. Depending on the surface charge density of the CTAT/SDBS vesicles and the mass ratio between the CTAT/SDBS vesicle and p-BNNT25, the CTAT/SDBS-BNNT complexes formed highly ordered superstructures. These structures include an intercalated lamellar phase with a centered rectangular structure (ICLP), in which a 2D array of p-BNNT25 is inserted into the multilamellar structure, and an AB structure, in which the BNNTs are surrounded by surfactant micelles in a triangular arrangement. To the best of our knowledge, this is the first demonstration of the fabrication of highly ordered superstructures of individually exfoliated and negatively charged BNNTs with positively charged surfactant vesicles through electrostatic interactions. This approach for the 2D binary superlattices of CTAT/SDBS-BNNT complexes induced by electrostatic interactions is expected to be beneficial for a wide range of one-dimensional (1D) nanoparticle applications.
对于氮化硼纳米管（BNNTs）的广泛实际应用而言，实现其高度有序的自组装结构至关重要。本研究报道了通过静电相互作用，将具有负表面电荷的单个剥离的BNNTs（p - BNNT25）与阳离子表面活性剂囊泡（CTAT/SDBS囊泡，由十六烷基三甲基氯化铵（CTAT）和十二烷基苯磺酸钠（SDBS）混合制备）形成的二维（2D）二元超晶格。根据CTAT/SDBS囊泡的表面电荷密度以及CTAT/SDBS囊泡与p - BNNT25之间的质量比，CTAT/SDBS - BNNT复合物形成了高度有序的超结构。这些结构包括具有中心矩形结构的插层层状相（ICLP），其中二维排列的p - BNNT25插入到多层结构中，以及AB结构，其中BNNTs被呈三角形排列的表面活性剂胶束包围。据我们所知，这是首次通过静电相互作用，利用带正电荷的表面活性剂囊泡制备单个剥离且带负电荷的BNNTs的高度有序超结构的实例。这种通过静电相互作用诱导形成CTAT/SDBS - BNNT复合物二维二元超晶格的方法，有望对广泛的一维（1D）纳米颗粒应用有益。
