Polarization behavior of polystyrene particles under direct current and low-frequency (<1 kHz) electric fields in dielectrophoretic systems
Electrophoresis 2016, 37, 635–644. DOI: 10.1002/elps.201500338 The relative polarization behavior of micron and sub‐micron polystyrene particles was investigated under direct current (DC) and low frequency ( 500 nm) exhibit negative DEP at lower frequencies (20–200 Hz) as illustrated by particle dep...
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| Veröffentlicht in: | Electrophoresis 2016-02, Vol.37 (4), p.NA |
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| creator | Saucedo-Espinosa, Mario A. Rauch, Mallory M. LaLonde, Alexandra Lapizco-Encinas, Blanca H. |
| description | Electrophoresis 2016, 37, 635–644. DOI: 10.1002/elps.201500338
The relative polarization behavior of micron and sub‐micron polystyrene particles was investigated under direct current (DC) and low frequency ( 500 nm) exhibit negative DEP at lower frequencies (20–200 Hz) as illustrated by particle depletion at the constrictions between the posts (right image). These differences in relative polarization responses can be exploited for the design of iDEP‐based separations and analysis of particle mixtures. |
| doi_str_mv | 10.1002/elps.201670041 |
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The relative polarization behavior of micron and sub‐micron polystyrene particles was investigated under direct current (DC) and low frequency (<1 kHz) alternating current (AC) electric fields. Relative polarization of particles with respect to the suspending medium is expressed in terms of the Clausius‐Mossotti factor, a parameter of crucial importance in dielectrophoretic‐based operations. Experiments and mathematical modeling were performed with insulator‐based dielectrophoresis (iDEP) devices with cylindrical posts made from polydimethylsiloxane. The results illustrated that particle polarizability and dielectrophoretic response depend greatly on particle size. Small particles (diameter < 500 nm) tend to exhibit positive DEP at the higher frequencies (200–1000 Hz) as illustrated by particles clustering at the constriction between the insulating posts (left image). Large particles (diameter > 500 nm) exhibit negative DEP at lower frequencies (20–200 Hz) as illustrated by particle depletion at the constrictions between the posts (right image). These differences in relative polarization responses can be exploited for the design of iDEP‐based separations and analysis of particle mixtures.</description><identifier>ISSN: 0173-0835</identifier><identifier>EISSN: 1522-2683</identifier><identifier>DOI: 10.1002/elps.201670041</identifier><language>eng</language><publisher>Blackwell Publishing Ltd</publisher><subject>Constrictions ; Direct current ; Electric fields ; Electrophoresis ; Mathematical models ; Polarization ; Polystyrene resins</subject><ispartof>Electrophoresis, 2016-02, Vol.37 (4), p.NA</ispartof><rights>2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Felps.201670041$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Felps.201670041$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27903,27904,45553,45554</link.rule.ids></links><search><creatorcontrib>Saucedo-Espinosa, Mario A.</creatorcontrib><creatorcontrib>Rauch, Mallory M.</creatorcontrib><creatorcontrib>LaLonde, Alexandra</creatorcontrib><creatorcontrib>Lapizco-Encinas, Blanca H.</creatorcontrib><title>Polarization behavior of polystyrene particles under direct current and low-frequency (<1 kHz) electric fields in dielectrophoretic systems</title><title>Electrophoresis</title><addtitle>ELECTROPHORESIS</addtitle><description>Electrophoresis 2016, 37, 635–644. DOI: 10.1002/elps.201500338
The relative polarization behavior of micron and sub‐micron polystyrene particles was investigated under direct current (DC) and low frequency (<1 kHz) alternating current (AC) electric fields. Relative polarization of particles with respect to the suspending medium is expressed in terms of the Clausius‐Mossotti factor, a parameter of crucial importance in dielectrophoretic‐based operations. Experiments and mathematical modeling were performed with insulator‐based dielectrophoresis (iDEP) devices with cylindrical posts made from polydimethylsiloxane. The results illustrated that particle polarizability and dielectrophoretic response depend greatly on particle size. Small particles (diameter < 500 nm) tend to exhibit positive DEP at the higher frequencies (200–1000 Hz) as illustrated by particles clustering at the constriction between the insulating posts (left image). Large particles (diameter > 500 nm) exhibit negative DEP at lower frequencies (20–200 Hz) as illustrated by particle depletion at the constrictions between the posts (right image). These differences in relative polarization responses can be exploited for the design of iDEP‐based separations and analysis of particle mixtures.</description><subject>Constrictions</subject><subject>Direct current</subject><subject>Electric fields</subject><subject>Electrophoresis</subject><subject>Mathematical models</subject><subject>Polarization</subject><subject>Polystyrene resins</subject><issn>0173-0835</issn><issn>1522-2683</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkE1v1DAQQC0EEkvhytnHcsgytjdxInFBVbsFraCifEhcrIkzUU29cWpnKelf4E_jKqjixsmS_d549Bh7KWAtAORr8mNaSxCVBtiIR2wlSikLWdXqMVuB0KqAWpVP2bOUfkBGms1mxX5fBI_R3eHkwsBbusKfLkQeej4GP6dpjjQQHzFOznpK_DB0FHnnItmJ20PMzxPHoeM-3BZ9pJsDDXbmx28Evz6_e8XJZzA6y3tHvkvcDVleLsN4FSLluTzlj2ifnrMnPfpEL_6eR-zL2ennk_Ni93H77uTtrrASQBQt1o0SpUKsmq7Wqq0RtYAWQaK2rcKqV0KRanvVllVHAgQ2ba1U21SwkVodseNl7hhD3jdNZu-SJe9xoHBIRtS5jtZKVhldL6iNIaVIvRmj22OcjQBzX93cVzcP1bPQLMKt8zT_hzanu4vLf91icV3O8evBxXhtKq10ab592JrvXz-dvd9eggH1B60imO0</recordid><startdate>201602</startdate><enddate>201602</enddate><creator>Saucedo-Espinosa, Mario A.</creator><creator>Rauch, Mallory M.</creator><creator>LaLonde, Alexandra</creator><creator>Lapizco-Encinas, Blanca H.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>201602</creationdate><title>Polarization behavior of polystyrene particles under direct current and low-frequency (<1 kHz) electric fields in dielectrophoretic systems</title><author>Saucedo-Espinosa, Mario A. ; Rauch, Mallory M. ; LaLonde, Alexandra ; Lapizco-Encinas, Blanca H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2001-ba893153aa69d873b8aa710ba02a7cb3a6f313e3bf3b56de101a9b833b9604273</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Constrictions</topic><topic>Direct current</topic><topic>Electric fields</topic><topic>Electrophoresis</topic><topic>Mathematical models</topic><topic>Polarization</topic><topic>Polystyrene resins</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Saucedo-Espinosa, Mario A.</creatorcontrib><creatorcontrib>Rauch, Mallory M.</creatorcontrib><creatorcontrib>LaLonde, Alexandra</creatorcontrib><creatorcontrib>Lapizco-Encinas, Blanca H.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Electrophoresis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Saucedo-Espinosa, Mario A.</au><au>Rauch, Mallory M.</au><au>LaLonde, Alexandra</au><au>Lapizco-Encinas, Blanca H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Polarization behavior of polystyrene particles under direct current and low-frequency (<1 kHz) electric fields in dielectrophoretic systems</atitle><jtitle>Electrophoresis</jtitle><addtitle>ELECTROPHORESIS</addtitle><date>2016-02</date><risdate>2016</risdate><volume>37</volume><issue>4</issue><epage>NA</epage><issn>0173-0835</issn><eissn>1522-2683</eissn><abstract>Electrophoresis 2016, 37, 635–644. DOI: 10.1002/elps.201500338
The relative polarization behavior of micron and sub‐micron polystyrene particles was investigated under direct current (DC) and low frequency (<1 kHz) alternating current (AC) electric fields. Relative polarization of particles with respect to the suspending medium is expressed in terms of the Clausius‐Mossotti factor, a parameter of crucial importance in dielectrophoretic‐based operations. Experiments and mathematical modeling were performed with insulator‐based dielectrophoresis (iDEP) devices with cylindrical posts made from polydimethylsiloxane. The results illustrated that particle polarizability and dielectrophoretic response depend greatly on particle size. Small particles (diameter < 500 nm) tend to exhibit positive DEP at the higher frequencies (200–1000 Hz) as illustrated by particles clustering at the constriction between the insulating posts (left image). Large particles (diameter > 500 nm) exhibit negative DEP at lower frequencies (20–200 Hz) as illustrated by particle depletion at the constrictions between the posts (right image). These differences in relative polarization responses can be exploited for the design of iDEP‐based separations and analysis of particle mixtures.</abstract><pub>Blackwell Publishing Ltd</pub><doi>10.1002/elps.201670041</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Constrictions Direct current Electric fields Electrophoresis Mathematical models Polarization Polystyrene resins |
| title | Polarization behavior of polystyrene particles under direct current and low-frequency (<1 kHz) electric fields in dielectrophoretic systems |
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