Janus Composite Nanotubes

Ying Chen; Zhen Liu; Xiaozhong Qu; Fuxin Liang; Zhenzhong Yang

doi:10.1002/asia.201600435

Janus Composite Nanotubes

Chem Asian J. 2016 Jun 21;11(12):1785-8. doi: 10.1002/asia.201600435. Epub 2016 May 24.

Authors

Ying Chen¹, Zhen Liu¹, Xiaozhong Qu¹, Fuxin Liang², Zhenzhong Yang³

Affiliations

¹ State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
² State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. liangfuxin@iccas.ac.cn.
³ State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. yangzz@iccas.ac.cn.

PMID: 27124877
DOI: 10.1002/asia.201600435

Abstract

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.

Keywords: Janus structures; composites; magnetic properties; nanotubes; surface chemistry.