Study viscoelasticity of ultrathin poly(oligo(ethylene glycol)   methacrylate) brushes by a quartz crystal microbalance with dissipation

doi:10.1021/la703661z

CORC > 北京大学 > 工学院

	Study viscoelasticity of ultrathin poly(oligo(ethylene glycol) methacrylate) brushes by a quartz crystal microbalance with dissipation
	Fu, Long ; Chen, Xinan ; He, Jianan ; Xiong, Chunyang ; Ma, Hongwei
刊名	langmuir
	2008
关键词	TRANSFER RADICAL POLYMERIZATION SUPPORTED MEMBRANES THIN-FILMS SURFACE FREQUENCY ADSORPTION INTERFACES RESONATOR THICKNESS LUBRICATION
DOI	10.1021/la703661z
英文摘要	Ultrathin polymer brushes play important roles in natural and artificial systems. To better understand and utilize their unique behaviors, characterization is a fundamental, but not trivial, task. In this paper, we demonstrated that the quartz crystal microbalance with dissipation (QCM-D) could be applied to study ultrathin poly(oligo(ethylene glycol) methacrylate) brushes. First, we identified four linear relations between dissipation/frequency changes and thickness changes, which were measured by QCM-D and ellipsometry, respectively. Next, we derived a set of equations starting from the Voigt model to further extract viscoelasticity of poly(OEGMA) brushes (<= 30 nm) under high-frequency vibration in contact with water. The viscosity was similar to 10(-3) N s m(-2) and the elasticity was similar to 10(5) N m(-2). Both were frequency dependent. Also discussed were other quantities such as the density (both the dry and wet film) and the working range of linear relations. These equations and quantitative information are important in advancing our understanding of ultrathin polymer brushes, which consequently promote our ability in designing functional surface coatings (i.e., in biosensor applications) and studying related interfacial phenomena.; Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary; SCI(E); EI; PubMed; 32; ARTICLE; 12; 6100-6106; 24
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154057]
专题	工学院
推荐引用方式 GB/T 7714	Fu, Long,Chen, Xinan,He, Jianan,et al. Study viscoelasticity of ultrathin poly(oligo(ethylene glycol) methacrylate) brushes by a quartz crystal microbalance with dissipation[J]. langmuir,2008.
APA	Fu, Long,Chen, Xinan,He, Jianan,Xiong, Chunyang,&Ma, Hongwei.(2008).Study viscoelasticity of ultrathin poly(oligo(ethylene glycol) methacrylate) brushes by a quartz crystal microbalance with dissipation.langmuir.
MLA	Fu, Long,et al."Study viscoelasticity of ultrathin poly(oligo(ethylene glycol) methacrylate) brushes by a quartz crystal microbalance with dissipation".langmuir (2008).