Crystal Growth Transition from Flat-On to Edge-On Induced by Solvent Evaporation in Ultrathin Films of Polystyrene-b-Poly(ethylene oxide)

doi:10.1021/la901108p

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	Crystal Growth Transition from Flat-On to Edge-On Induced by Solvent Evaporation in Ultrathin Films of Polystyrene-b-Poly(ethylene oxide)
	Yang, Ping; Han, Yanchun
刊名	LANGMUIR
	2009-09-01
卷号	25 期号:17 页码:9960-9968
ISSN号	0743-7463
DOI	10.1021/la901108p
英文摘要	The transition of lamellar crystal orientation from flat-on to edge-on in ultrathin films of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) via solvent vapor (toluene) treatment Was investigated. When the as-prepared film was treated in saturated solvent vapor, breakout crystals could form quickly, and then they transformed from square single crystals (flat-on lamellae) to dendrites and finally to nanowire crystals (edge-on lamellae). Initially, heterogeneous nucleation tit the polymer/substrate interface dominated the structure evolution, leading to flat-on lamellar crystals orientation. And the transition from faceted habits to dendrites indicated a transition of underlying mechanism from nucleation-controlled to diffusion-limited growth. As the solvent molecules gradually diffused into the polymer/substrate interface, it will subsequently weaken the polymer-substrate interaction. In this case, lower free energy lamellae of an edge-on orientation could be obtained by the gain of free volume of the soluble PS block.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000269197500048
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/67961]
专题	中国科学院化学研究所
通讯作者	Han, Yanchun
作者单位	Chinese Acad Sci, Changchun Inst Appl Chem, Grad Univ, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Yang, Ping,Han, Yanchun. Crystal Growth Transition from Flat-On to Edge-On Induced by Solvent Evaporation in Ultrathin Films of Polystyrene-b-Poly(ethylene oxide)[J]. LANGMUIR,2009,25(17):9960-9968.
APA	Yang, Ping,&Han, Yanchun.(2009).Crystal Growth Transition from Flat-On to Edge-On Induced by Solvent Evaporation in Ultrathin Films of Polystyrene-b-Poly(ethylene oxide).LANGMUIR,25(17),9960-9968.
MLA	Yang, Ping,et al."Crystal Growth Transition from Flat-On to Edge-On Induced by Solvent Evaporation in Ultrathin Films of Polystyrene-b-Poly(ethylene oxide)".LANGMUIR 25.17(2009):9960-9968.