Geometry induced sequence of nanoscale Frank-Kasper and quasicrystal   mesophases in giant surfactants

doi:10.1073/pnas.1609422113

CORC > 北京大学 > 化学与分子工程学院

	Geometry induced sequence of nanoscale Frank-Kasper and quasicrystal mesophases in giant surfactants
	Yue, Kan ; Huang, Mingjun ; Marson, Ryan L. ; He, Jinlin ; Huang, Jiahao ; Zhou, Zhe ; Wang, Jing ; Liu, Chang ; Yan, Xuesheng ; Wu, Kan ; Guo, Zaihong ; Liu, Hao ; Zhang, Wei ; Ni, Peihong ; Wesdemiotis, Chrys ; Zhang, Wen-Bin ; Glotzer, Sharon C. ; Cheng, Stephen Z. D.
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2016
关键词	self-assembly Frank-Kasper phases quasicrystal phases giant surfactants POSS MESOPOROUS SILICA SHAPE AMPHIPHILES PHASES SYMMETRY ASSEMBLIES
DOI	10.1073/pnas.1609422113
英文摘要	Frank-Kasper (F-K) and quasicrystal phases were originally identified in metal alloys and only sporadically reported in soft materials. These unconventional sphere-packing schemes open up possibilities to design materials with different properties. The challenge in soft materials is how to correlate complex phases built from spheres with the tunable parameters of chemical composition and molecular architecture. Here, we report a complete sequence of various highly ordered mesophases by the self-assembly of specifically designed and synthesized giant surfactants, which are conjugates of hydrophilic polyhedral oligomeric silsesquioxane cages tethered with hydrophobic polystyrene tails. We show that the occurrence of these mesophases results from nanophase separation between the heads and tails and thus is critically dependent on molecular geometry. Variations in molecular geometry achieved by changing the number of tails from one to four not only shift compositional phase boundaries but also stabilize F-K and quasicrystal phases in regions where simple phases of spheroidal micelles are typically observed. These complex self-assembled nanostructures have been identified by combining X-ray scattering techniques and real-space electron microscopy images. Brownian dynamics simulations based on a simplified molecular model confirm the architecture-induced sequence of phases. Our results demonstrate the critical role of molecular architecture in dictating the formation of supramolecular crystals with "soft" spheroidal motifs and provide guidelines to the design of unconventional self-assembled nanostructures.; National Science Foundation (NSF) [DMR-1408872]; US Army Research Office [W911NF-10-1-0518]; National Natural Science Foundation of China [21304061]; Natural Science Foundation of Jiangsu Province [BK20130286]; NSF [CHE-1308307]; US Department of Energy (DOE), Office of Science; DOE Office of Science User Facility [DE-AC05-00OR22725]; US Department of Energy (DOE), Office of Basic Energy Sciences; SCI(E); ARTICLE; wenbin@pku.edu.cn; sglotzer@umich.edu; scheng@uakron.edu; 50; 14195-14200; 113
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458071]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Yue, Kan,Huang, Mingjun,Marson, Ryan L.,et al. Geometry induced sequence of nanoscale Frank-Kasper and quasicrystal mesophases in giant surfactants[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2016.
APA	Yue, Kan.,Huang, Mingjun.,Marson, Ryan L..,He, Jinlin.,Huang, Jiahao.,...&Cheng, Stephen Z. D..(2016).Geometry induced sequence of nanoscale Frank-Kasper and quasicrystal mesophases in giant surfactants.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA.
MLA	Yue, Kan,et al."Geometry induced sequence of nanoscale Frank-Kasper and quasicrystal mesophases in giant surfactants".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2016).