Kim Dukeun, Sawada Toshiki, Zhi Chunyi, Bando Yoshio, Golberg Dmitri, Serizawa Takeshi
J Nanosci Nanotechnol. 2014 Apr;14(4):3028-33. doi: 10.1166/jnn.2014.8579.
We report that the simple aromatic molecules successfully disentangle and disperse multi-walled boron nitride nanotubes (BNNTs) in aqueous solutions through pi-pi stacking interactions. Aromatic molecules such as derivatives of naphthalene, anthracene, and pyrene were used as dispersants and components for construction of nanohybrids. Spectroscopic analyses of water-dispersed BNNTs revealed that not only numbers of aromatic rings but also substituted functional groups were essential for dispersion capabilities. It was suggested that greater numbers of aromatic rings and a carboxylic acid as the substituted group showed higher dispersion capabilities among the molecules used in this study. Detailed microscopic analyses using atomic force microscopy and transmission electron microscopy showed certain isolation capabilities of the aromatic molecules for BNNTs in aqueous solution. Moreover, fluorescence spectra indicated that BNNTs and the aromatic molecules have different electronic states after hybrid formation. Our results using the simple aromatic molecules will be utilized as a basic data for dispersion of BNNTs and construction of disentangled BNNT nanohybrids effectively.
我们报告称，简单的芳香族分子通过π-π堆积相互作用成功地在水溶液中解开并分散了多壁氮化硼纳米管（BNNTs）。萘、蒽和芘的衍生物等芳香族分子被用作分散剂和构建纳米杂化物的组分。对水分散的BNNTs进行的光谱分析表明，不仅芳香环的数量，而且取代官能团对于分散能力也至关重要。结果表明，在本研究中使用的分子中，更多数量的芳香环和作为取代基的羧酸表现出更高的分散能力。使用原子力显微镜和透射电子显微镜进行的详细微观分析表明，芳香族分子在水溶液中对BNNTs具有一定的隔离能力。此外，荧光光谱表明，BNNTs和芳香族分子在杂化形成后具有不同的电子态。我们使用简单芳香族分子的研究结果将作为有效分散BNNTs和构建解开的BNNT纳米杂化物的基础数据。
