Linked Life Data

17306286

Source:http://linkedlifedata.com/resource/pubmed/id/17306286

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-4-17
pubmed:abstractText
The effect of the presence of a charged boundary on the electrophoretic behavior of a particle is investigated by considering a sphere at an arbitrary position in a spherical cavity under conditions of low surface potential and weak applied electric field. Previous analyses are modified by using a more realistic electrostatic force formula and several interesting results, which are not reported in the literature, are observed. We show that the qualitative behavior of a particle depends largely on its position, its size relative to that of a cavity, and the thickness of the electric double layer. In general, the presence of a cavity has the effect of increasing the conventional hydrodynamic drag on a particle through a nonslip condition on the former. Also, a decrease in the thickness of the double layer surrounding a sphere has the effect of increasing the electrostatic force acting on its surface so that its mobility increases. However, this may not be the case when an uncharged particle in placed in a positively charged cavity, where the electroosmotic flow plays a role; for example, the mobility can exhibit a local maximum and the direction of electrophoresis can change.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jun
pubmed:issn
0021-9797
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
310
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
281-91
pubmed:dateRevised
2009-11-11
pubmed:year
2007
pubmed:articleTitle
Effect of a charged boundary on electrophoresis: a sphere at an arbitrary position in a spherical cavity.
pubmed:affiliation
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan. jphsu@ntu.edu.tw
pubmed:publicationType
Journal Article