ICCAS OpenIR
Surface defects in polyelectrolyte multilayers: Effects of drying and deposition cycle
Wang, Liming1; Wang, Li2; Su, Zhaohui1
2011
Source PublicationSOFT MATTER
ISSN1744-683X
Volume7Issue:10Pages:4851-4855
AbstractLayer-by-layer deposition has been used extensively to fabricate ultrathin films, yet some fundamental aspects of this seemingly simple methodology remain unclear, such as defects and factors controlling their formation. In this work we use charged gold nanoparticles as a probe to assess charge distribution on polyelectrolyte multilayer surfaces. This straightforward approach revealed that while excess charges are present rather uniformly throughout most of the surface, there are isolated domains free of excess charges, i.e. surface defects. Analysis of defect size distribution indicated that the defects are formed via desorption of individual polyelectrolyte chains from the surface. It was further revealed that intermediate drying in between polyelectrolyte depositions can reduce surface defect by >90%, resulting in more coherent films. Area fraction of defects was found to decrease with the number of layers deposited. These surface defects result in significant contact angle hysteresis.
DOI10.1039/c1sm05158j
Indexed BySCI
Language英语
WOS IDWOS:000290227400037
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/73324
Collection中国科学院化学研究所
Corresponding AuthorSu, Zhaohui
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Wang, Liming,Wang, Li,Su, Zhaohui. Surface defects in polyelectrolyte multilayers: Effects of drying and deposition cycle[J]. SOFT MATTER,2011,7(10):4851-4855.
APA Wang, Liming,Wang, Li,&Su, Zhaohui.(2011).Surface defects in polyelectrolyte multilayers: Effects of drying and deposition cycle.SOFT MATTER,7(10),4851-4855.
MLA Wang, Liming,et al."Surface defects in polyelectrolyte multilayers: Effects of drying and deposition cycle".SOFT MATTER 7.10(2011):4851-4855.
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