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These porous membranes were fabricated within the channels of glass microfluidic devices exploiting laminar flow to bring an alcoholic sol\u2013gel precursor (titanium isopropoxide in 2\u2010propanol) into contact with an alcohol\u2013water solution at a channel cross intersection. These two streams reacted at the fluidic interface to form a porous titania membrane. The thickness of the membrane could be altered by changing the [H<jats:sub>2<\/jats:sub>O]. Analyte concentration was accomplished by applying a voltage across the titania membrane. The level of analyte enrichment was monitored, and enrichment factors of above 4000 in 400\u2009s were obtained for 2,7\u2010dichlorofluorescein.<\/jats:p>","DOI":"10.1002\/elps.200900027","type":"journal-article","created":{"date-parts":[[2009,8,31]],"date-time":"2009-08-31T10:55:39Z","timestamp":1251716139000},"page":"3160-3167","source":"Crossref","is-referenced-by-count":28,"title":["Electrokinetic trapping using titania nanoporous membranes fabricated using sol\u2013gel chemistry on microfluidic devices"],"prefix":"10.1002","volume":"30","author":[{"given":"Kurt W.","family":"Hoeman","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeffrey J.","family":"Lange","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gregory T.","family":"Roman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel A.","family":"Higgins","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher T.","family":"Culbertson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,9,17]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac025503x"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac0346813"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac034427a"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1039\/b400663a"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0517421"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.1850610"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac0301550"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.282.5388.484"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac0510033"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9673(01)00856-1"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac0701177"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9673(02)01246-3"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac991236s"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9673(00)01080-3"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1002\/elps.200700704"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac0106288"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/1522-2683(200109)22:16<3509::AID-ELPS3509>3.0.CO;2-Z"},{"key":"e_1_2_6_19_2","doi-asserted-by":"publisher","DOI":"10.1039\/b416414h"},{"key":"e_1_2_6_20_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac0497151"},{"key":"e_1_2_6_21_2","doi-asserted-by":"publisher","DOI":"10.1002\/elps.200600252"},{"key":"e_1_2_6_22_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac020629f"},{"key":"e_1_2_6_23_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0374776"},{"key":"e_1_2_6_24_2","doi-asserted-by":"publisher","DOI":"10.1039\/b300102d"},{"key":"e_1_2_6_25_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja802692x"},{"key":"e_1_2_6_26_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac701759f"},{"key":"e_1_2_6_27_2","doi-asserted-by":"publisher","DOI":"10.1039\/b509063f"},{"key":"e_1_2_6_28_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac035290r"},{"key":"e_1_2_6_29_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac060031y"},{"key":"e_1_2_6_30_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac071162h"},{"key":"e_1_2_6_31_2","doi-asserted-by":"publisher","DOI":"10.1021\/nl0494811"},{"key":"e_1_2_6_32_2","doi-asserted-by":"publisher","DOI":"10.1039\/b717220f"},{"key":"e_1_2_6_33_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11051-005-5133-x"},{"key":"e_1_2_6_34_2","doi-asserted-by":"publisher","DOI":"10.1021\/la702326v"},{"key":"e_1_2_6_35_2","doi-asserted-by":"publisher","DOI":"10.1021\/la010429j"},{"key":"e_1_2_6_36_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac050835y"},{"key":"e_1_2_6_37_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac050321z"},{"key":"e_1_2_6_38_2","doi-asserted-by":"publisher","DOI":"10.1039\/B809370A"},{"key":"e_1_2_6_39_2","doi-asserted-by":"publisher","DOI":"10.1039\/b509957a"},{"key":"e_1_2_6_40_2","doi-asserted-by":"publisher","DOI":"10.1021\/la070051a"},{"key":"e_1_2_6_41_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.285.5424.83"},{"key":"e_1_2_6_42_2","doi-asserted-by":"publisher","DOI":"10.1039\/b603275c"},{"key":"e_1_2_6_43_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja025835j"},{"key":"e_1_2_6_44_2","volume-title":"Sol\u2010Gel Materials: Chemistry and Applications","author":"Wright J. 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