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Microstructures and mechanical performance of polyelectrolyte/nanocrystalline TiO2 nanolayered composites
B. Zhang; H. F. Tan; J. W. Yan; M. D. Zhang; X. D. Sun; G. P. Zhang
2013
Source PublicationNanoscale Research Letters
ISSN1931-7573
Volume8Pages:1-5
AbstractBiological materials with hierarchically laminated structures usually exhibit a good synergy between strength and fracture toughness. Here, we show that a bio-inspired (polyelectrolyte (PE)/TiO2)(4) nanolayered composite with a thickness ratio of TiO2 and amorphous PE layers of about 1.1 has been prepared successfully on Si substrates by layer-by-layer self-assembly and chemical bath deposition methods. Microstructures of the nanolayered composite were investigated by scanning electron microscopy, secondary ion mass spectroscopy, and high-resolution transmission microscopy. Mechanical performance of the composite was characterized by instrumented indentation. The composite consisting of 17.9-nm-thick nanocrystalline TiO2 and 16.4-nm-thick amorphous PE layers has a strength of about 245 MPa, which is close to that of shells, while the fracture toughness of the composite, K (IC) = 1.62 +/- 0.30 MPa center dot m(1/2), is evidently higher than that of the bulk TiO2. A possible strategy to build the composite at nanoscale for high mechanical performance was addressed.
description.department[zhang, bin ; tan, hai-feng ; zhang, ming-dong ; sun, xu-dong] northeastern univ, minist educ, key lab anisotropy & texture mat, shenyang 110819, peoples r china. [tan, hai-feng ; yan, jia-wei ; zhang, guang-ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhang, b (reprint author), northeastern univ, minist educ, key lab anisotropy & texture mat, 3-11 wenhua rd, shenyang 110819, peoples r china. ; zhangb@atm.neu.edu.cn ; gpzhang@imr.ac.cn
KeywordBio-inspired Nanolayered Composite Layer-by-layer Self-assembly Chemical Bath Deposition Mechanical Property Nacre Design Fracture Films
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71668
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
B. Zhang,H. F. Tan,J. W. Yan,et al. Microstructures and mechanical performance of polyelectrolyte/nanocrystalline TiO2 nanolayered composites[J]. Nanoscale Research Letters,2013,8:1-5.
APA B. Zhang,H. F. Tan,J. W. Yan,M. D. Zhang,X. D. Sun,&G. P. Zhang.(2013).Microstructures and mechanical performance of polyelectrolyte/nanocrystalline TiO2 nanolayered composites.Nanoscale Research Letters,8,1-5.
MLA B. Zhang,et al."Microstructures and mechanical performance of polyelectrolyte/nanocrystalline TiO2 nanolayered composites".Nanoscale Research Letters 8(2013):1-5.
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