Microscale Marangoni actuation: All-optical and all-electrical methods
2006 (English)In: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 106, no 8-9, 815-821 p.Article in journal (Refereed) Published
We present experimental results from an all-optical microfluidic platform that may be complimented by a thin film all-electrical network. Using these configurations we have studied the microfluidic convective flow systems of silicone oil, glycerol, and 1,3,5-trinitrotoluene on open surfaces through the production of surface tension gradients derived from thermal gradients. We show that sufficient localized thermal variation can be created utilizing surface plasmons and/or engaging individually addressable resistive thermal elements. Both studies manipulate fluids via Marangoni forces, each having their unique exploitable advantages. Surface plasmon excitation in metal foils are the driving engine of many physical-, chemical-, and bio-sensing applications. Incorporating, for the first time, the plasmon concept in microfluidics, our results thus demonstrate great potential for simultaneous fluid actuation and sensing. (c) 2006 Elsevier B.V. All rights reserved.
Place, publisher, year, edition, pages
2006. Vol. 106, no 8-9, 815-821 p.
surface plasmons, Marangoni forces, microfluidic
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-41580DOI: 10.1016/j.ultramic.2005.12.018ISI: 000239230600026ScopusID: 2-s2.0-33745739595OAI: oai:DiVA.org:kth-41580DiVA: diva2:445534
QC 20111004. Conference: 7th International Conferene on Scanning Probe Microscopy, Sensors and Nanostructures. Cancun, MEXICO. JUN 05-08, 20052011-10-042011-09-292011-10-04Bibliographically approved