Janus Composite Nanotubes

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• 作者：Ying Chen ; Zhen Liu ; Dr. Xiaozhong Qu ; Dr. Fuxin Liang and Prof. Zhenzhong Yang
• 刊名：Chemistry – An Asian Journal
• 出版年：2016
• 出版时间：June 21, 2016
• 年：2016
• 卷：11
• 期：12
• 页码：1785-1788
• 全文大小：1575K
• ISSN：1861-471X

文摘

We propose a facile method to achieve paramagnetic Janus nanotubes with two compositions compartmentalized onto the interior and exterior surfaces, respectively. A sulfonated polydivinylbenzene (PDVB) nanotube is prepared by simple sulfonation of the exterior surface of a PDVB nanotube. Silica@FeOOH dual layers are sequentially grown onto the sulfonated PDVB nanotube surface. The composite nanotubes become paramagnetic after calcination and can be broken into shorter pieces under vigorous ultrasonication. After selective modification of the interior and exterior surfaces of the paramagnetic nanotubes, the nanotube shell becomes Janus in wettability. Desired hydrophobic species can be selectively captured inside the cavity. The paramagnetic Janus composite nanotubes can align into parallel chains under a magnetic field, which is self-disassembled upon removal of the magnetic field.