IMECH-IR  > 力学所知识产出(1956-2008)
A Microscopic Approach to Studying Colloidal Stability
Sun ZW(孙祉伟); Xu SH(徐升华); Dai GL(戴国亮); Li YM; Lou LR; Liu QS(刘秋生); Zhu RC(朱如曾); Sun, Z (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China.
Source PublicationJournal of Chemical Physics
AbstractA novel approach to the investigation of colloidal aggregation in experiments performed at microscopic particle levels by means of artificially induced particle collisions with the aid of optical tweezers is proposed. A physical model describing the artificially induced collisions was suggested. The stability ratios for different electrolyte concentrations (NaCI) are estimated by dividing the total number of particle collisions by the number of collisions leading to permanent doublets. The experimental results under different electrolyte concentrations are compared with zeta potentials and turbidity measurements. In regards to fully dispersed or rapid-coagulated systems, this approach can conveniently provide an accurate judgment of the system's stability. For general slow-coagulated systems, when the stability ratio is greater than 1.8, our data are in agreement with those obtained from the turbidity measurements. When the stability ratio is less than 1.8, the accuracy of the approach is limited due to the possibility of the imprecise control of the short duration during which the particle pair is held in the optical trap for the induced collisions.
Subject Area力学
Indexed BySCI ; EI
WOS IDWOS:000184103000063
WOS Research AreaPhysics
WOS SubjectPhysics, Atomic, Molecular & Chemical
Citation statistics
Cited Times:37[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorSun, Z (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Sun ZW,Xu SH,Dai GL,et al. A Microscopic Approach to Studying Colloidal Stability[J]. Journal of Chemical Physics,2003,119(4):2399-2405.
APA 孙祉伟.,徐升华.,戴国亮.,Li YM.,Lou LR.,...&Sun, Z .(2003).A Microscopic Approach to Studying Colloidal Stability.Journal of Chemical Physics,119(4),2399-2405.
MLA 孙祉伟,et al."A Microscopic Approach to Studying Colloidal Stability".Journal of Chemical Physics 119.4(2003):2399-2405.
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