IMECH-IR  > 国家微重力实验室
Influence of sedimentation on crystallization of charged colloidal particles
Du H(杜嬛); Xu SH(徐升华); Sun ZW(孙祉伟); Liu L(刘蕾); Sun, ZW; Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China.
Source PublicationCHINESE JOURNAL OF CHEMICAL PHYSICS
2012-06-27
Volume25Issue:3Pages:318-324
ISSN1674-0068
AbstractThe method of density matching between the solid and liquid phases is often adopted to effectively eliminate the effect of sedimentation of suspensions on dynamic behavior of a colloidal system. Experiments on crystallization of charged colloidal microspheres with diameter of 98 nm dispersed in density-matched and -unmatched media (mixtures of H2O and D2O in proper proportion) are compared to examine the influence of sedimentation. Reflection spectra of colloidal suspensions were used to monitor the crystallization process. Results showed that the crystal size of the density-unmatched (namely, in the presence of sedimentation) sample grew faster than that of the density-matched (in the absence of sedimentation) case at the initial stage of the crystallization, and then the latter overtook and outstripped the former. To explain these observations, we assume that in the settling of crystals sedimentation facilitates result in more particles getting into the crystal structures. However, as the crystals increase to varying sizes, the settling velocities become large and hydrodynamic friction strips off some particles from the delicate crystal structures. Overall, the sedimentation appears to accelerate the crystal size growth initially and then retard the growth. In addition, the crystal structures formed under microgravity were more closely packed than that in normal gravity.
KeywordColloidal Crystal Density Matching Sedimentation Reflection Spectrum Debye-screening Length Kossel Line Analysis Hard-sphere Binary-mixtures Kinetic Analyses Microscopic Observation Polystyrene Spheres Ordered Colloids Phase-transition Suspensions
Subject Area物理力学
URL查看原文
Indexed BySCI ; CSCD
Language英语
WOS IDWOS:000306535500011
Funding OrganizationThis work was supported by the National Natural Science Foundation of China (No.11172302, No.10972217 and No.11032011), the Knowledge Innovation Program of the Chinese Academy of Sciences (No.KJCX2-YW-L08) and the National Science Foundation for Post-doctoral Scientists of China (No.20100480482).
DepartmentNML复杂流体
ClassificationQ4
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46588
Collection国家微重力实验室
Corresponding AuthorSun, ZW; Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Du H,Xu SH,Sun ZW,et al. Influence of sedimentation on crystallization of charged colloidal particles[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2012,25(3):318-324.
APA Du H,Xu SH,Sun ZW,Liu L,Sun, ZW,&Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China..(2012).Influence of sedimentation on crystallization of charged colloidal particles.CHINESE JOURNAL OF CHEMICAL PHYSICS,25(3),318-324.
MLA Du H,et al."Influence of sedimentation on crystallization of charged colloidal particles".CHINESE JOURNAL OF CHEMICAL PHYSICS 25.3(2012):318-324.
Files in This Item: Download All
File Name/Size DocType Version Access License
SCI-J2012-096.pdf(253KB) 开放获取--View Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Du H(杜嬛)]'s Articles
[Xu SH(徐升华)]'s Articles
[Sun ZW(孙祉伟)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Du H(杜嬛)]'s Articles
[Xu SH(徐升华)]'s Articles
[Sun ZW(孙祉伟)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Du H(杜嬛)]'s Articles
[Xu SH(徐升华)]'s Articles
[Sun ZW(孙祉伟)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: SCI-J2012-096.pdf
Format: Adobe PDF
This file does not support browsing at this time
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.