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CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
3D investigation on polystyrene colloidal crystals by floatage self-assembly with mixed solvent via synchrotron radiation x-ray phase-contrast computed tomography
作者: Fu, YN; Xie, HL; Deng, B; Du, GH; Xiao, TQ
刊名: RADIATION PHYSICS AND CHEMISTRY
出版日期: 2017
卷号: 135, 页码:49-54
关键词: Colloidal crystal ; Floatage self-assembly ; Mixed solvent ; Synchrotron radiation ; Computed tomography ; Phase-contrast
DOI: 10.1016/j.radphyschem.2017.02.050
文章类型: 期刊论文
英文摘要: The floatage self-assembly method was introduced with mixed solvent as the medium of polystyrene sphere suspension to fabricate the colloidal crystal. The three dimensional (3D) void system of the colloidal crystal was noninvasively characterized by synchrotron radiation phase-contrast computed tomography, and the quantitative image analysis was implemented aiming to the polystyrene sphere colloidal crystal. Comparing with gravity sedimentation method, the three samples fabricated from floatage self-assembly with mixed solvents have the lowest porosity, and when ethylene glycol and water were mixed with ratio of 1:1, the lowest porosity of 27.49% could be achieved, that has been very close to the minimum porosity of ordered 3D monodisperse sphere array (26%). In single slices, the porosities and fractal dimension for the voids were calculated. The results showed that two factors would significantly influence the porosity of the whole colloidal crystal: the first deposited sphere layer's orderliness and the sedimentation speed of the spheres. The floatage self-assembly could induce a stable close-packing, process, resulted from the powerful nucleation force-lateral capillary force coupled with the mixed solvent to regulate the floating upward speed for purpose of matching the assembly rate.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000399846700009
ISSN号: 0969-806X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27239
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Fu, YN,Xie, HL,Deng, B,et al. 3D investigation on polystyrene colloidal crystals by floatage self-assembly with mixed solvent via synchrotron radiation x-ray phase-contrast computed tomography[J]. RADIATION PHYSICS AND CHEMISTRY,2017-01-01,135:49-54.
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