Multiwalled carbon nanotube microspheres from layer-by-layer assembly   and calcination

doi:10.1021/jp711793c

CORC > 北京大学 > 化学与分子工程学院

	Multiwalled carbon nanotube microspheres from layer-by-layer assembly and calcination
	Shi, Jiahua ; Chen, Zhiyong ; Qin, Yujun ; Guo, Zhi-Xin
刊名	journal of physical chemistry c
	2008
关键词	MULTILAYER FILMS FABRICATION COMPOSITES POLYELECTROLYTES DEPOSITION MICROCAPSULES NANOPARTICLES CONSTRUCTION POLYSTYRENE ALIGNMENT
DOI	10.1021/jp711793c
英文摘要	Multiwalled carbon nanotube (MWNT) microspheres were fabricated by layer-by-layer (LBL) assembling of modified MWNTs and poly(diallyldimethylammonium chloride) (PDDA) via electrostatic interactions on poly(methacrylic acid) (PMAA) microspheres and subsequent calcination. The MWNT/PDDA film growth on planar substrates monitored by scanning electron microscopy (SEM) and UV-vis spectrophotometry demonstrated the success of uniform LBL assembly. SEM observations of the stepwise increase in MWNT thickness on PMAA microspheres with the increase of LBL cycle number indicated the efficiency of the spherical assembly. Upon calcination of the (MWNT/PDDA)/PMAA microspheres in air at 400 degrees C for 2 h to remove the PMAA templates, the resulting MWNTs exhibited microsphere morphology with diameters that are half those of their precursors. Transmission electron microscopic images revealed that the MWNT microspheres were not solid, but loose and porous. It is proposed that the MWNT layers shrink during the calcination and form such microsphere structure due to the van der Waals attractions between the nanotubes.; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; SCI(E); EI; 25; ARTICLE; 31; 11617-11622; 112
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/262596]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Shi, Jiahua,Chen, Zhiyong,Qin, Yujun,et al. Multiwalled carbon nanotube microspheres from layer-by-layer assembly and calcination[J]. journal of physical chemistry c,2008.
APA	Shi, Jiahua,Chen, Zhiyong,Qin, Yujun,&Guo, Zhi-Xin.(2008).Multiwalled carbon nanotube microspheres from layer-by-layer assembly and calcination.journal of physical chemistry c.
MLA	Shi, Jiahua,et al."Multiwalled carbon nanotube microspheres from layer-by-layer assembly and calcination".journal of physical chemistry c (2008).