Blue phase liquid crystals affected by graphene oxide modified with   aminoazobenzol group

doi:10.1080/02678292.2015.1126862

CORC > 北京大学 > 工学院

	Blue phase liquid crystals affected by graphene oxide modified with aminoazobenzol group
	Zhang, Weikai ; Wang, Xiaomei ; Wang, Dong ; Yang, Zhou ; Gao, Hong ; Xing, Yan ; He, Wanli ; Cao, Hui ; Yang, Huai
刊名	LIQUID CRYSTALS
	2016
关键词	nanosheets graphene oxide stability Blue phase EXFOLIATED GRAPHITE OXIDE ELECTROOPTICAL PROPERTIES SHEETS NANOPARTICLES DISPERSIONS COMPOSITES REDUCTION
DOI	10.1080/02678292.2015.1126862
英文摘要	Liquid-crystalline blue phases (BPs) are stable only for very narrow temperature range between the isotropic and the chiral nematic phase that severely hinders their applicability. Herein, the aminoazobenzol group was chemically grafted onto epoxy group of graphene oxide (GO) via addition reaction. Successful grafting of aminoazobenzol group was confirmed using X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), UV-vis absorption spectra and thermogravimetric analysis (TGA). The resultant aminoazobenzol group-modified GO sheets, which is reduced (RGO-Az), were easily redispersable in common organic solvents or liquid crystals (LCs). By doping different contents of RGO-Az, nanosheets could stabilise BP and increase the BP range. When doped with 0.5wt% RGO-Az, the mixtures show the wider range with 5.9 degrees C than the range with 3.6 degrees C of BPLCs without RGO-Az. Meanwhile, the phase sequence and the range of the aforementioned phases are reproducible upon heating and cooling, which shows that the BPs doped with RGO-Az nanosheets are thermodynamically stable.; National Natural Science Foundation of China [51173017, 51373024, 51473020, 61370048]; National Key Basic Research Program of China [2014CB931804]; Fundamental Research Funds for the Central Universities [FRF-TP-14-001A2]; Major Project of International Cooperation of the Ministry of Science and Technology [2013DFB50340]; Beijing Higher Education Young Elite Teacher Project [YETP0356]; SCI(E); ARTICLE; wangdong@ustb.edu.cn; yangz@ustb.edu.cn; yanghuai@pku.edu.cn; 5; 573-580; 43
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/438308]
专题	工学院
推荐引用方式 GB/T 7714	Zhang, Weikai,Wang, Xiaomei,Wang, Dong,et al. Blue phase liquid crystals affected by graphene oxide modified with aminoazobenzol group[J]. LIQUID CRYSTALS,2016.
APA	Zhang, Weikai.,Wang, Xiaomei.,Wang, Dong.,Yang, Zhou.,Gao, Hong.,...&Yang, Huai.(2016).Blue phase liquid crystals affected by graphene oxide modified with aminoazobenzol group.LIQUID CRYSTALS.
MLA	Zhang, Weikai,et al."Blue phase liquid crystals affected by graphene oxide modified with aminoazobenzol group".LIQUID CRYSTALS (2016).