Droplet-Volume-Adjustable Microinjectors Using a Digital Combination of Multiple Current Paths Connected to Single Microheater

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dc.contributor.authorJe, Chang-Hanko
dc.contributor.authorKang, Tae-Gooko
dc.contributor.authorCho, Young-Hoko
dc.date.accessioned2013-03-11T18:36:47Z-
dc.date.available2013-03-11T18:36:47Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2009-08-
dc.identifier.citationJOURNAL OF MICROELECTROMECHANICAL SYSTEMS, v.18, pp.884 - 891-
dc.identifier.issn1057-7157-
dc.identifier.urihttp://hdl.handle.net/10203/99933-
dc.description.abstractIn this paper, we design, fabricate, and test a singleheater microinjector, whose ejected-droplet volume is adjusted by a digital combination of multiple current paths connected to a single microheater. The novel aspect of the present method includes using the single microheater having multiple current paths to achieve multilevel droplet volume adjustment. In the design process, we design four pairs of current I/O interconnection lines connected to the microheater. We numerically estimate the actually heated area whenever we vary the combination of 4-b current path through the single microheater. On the basis of the numerical and theoretical estimation results, we design the droplet-volume-adjustable microinjector having a rectangular (R)- and a circular (C)-shape single microheater. In the experimental study, we measure the sizes of the generated bubbles, as well as the volumes and velocities of the ejected droplets, according to the digital current-path combination. In the bubble generation test, we use the 1-kHz 15.0-V 3-mu s pulsewidth electrical signal and DI water at room temperature. The measured input power is varied from 8.7 to 24.9 mu W for the R type and from 8.1 to 43.8 mu W for the C type as the current path is changed. The projected area of the generated bubble is varied from 440 to 1,360 mu m(2) for the R type and from 800 to 3300 mu m(2) for the C type at six levels, respectively. Under the same experimental condition, we measure the ejected-droplet volumes and velocities. It is found that the ejected-droplet volumes are varied from 9.4 +/- 0.7 to 20.7 +/- 1.8 pL at three levels for the R type and from 7.4 +/- 0.8 to 27.4 +/- 2.0 pL at five levels for the C type, respectively, while the ejected-droplet velocities are varied from 0.8 +/- 0.01 to 1.7 +/- 0.01 m/s for the R type and from 0.5 +/- 0.02 to 2.8 +/- 0.03 m/s for the C type, respectively.-
dc.languageEnglish-
dc.publisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC-
dc.subjectSATELLITE DROPS-
dc.subjectBUBBLE-GROWTH-
dc.subjectARRAY-
dc.subjectMODEL-
dc.titleDroplet-Volume-Adjustable Microinjectors Using a Digital Combination of Multiple Current Paths Connected to Single Microheater-
dc.typeArticle-
dc.identifier.wosid000268641700014-
dc.identifier.scopusid2-s2.0-68849104012-
dc.type.rimsART-
dc.citation.volume18-
dc.citation.beginningpage884-
dc.citation.endingpage891-
dc.citation.publicationnameJOURNAL OF MICROELECTROMECHANICAL SYSTEMS-
dc.identifier.doi10.1109/JMEMS.2009.2020464-
dc.contributor.localauthorCho, Young-Ho-
dc.contributor.nonIdAuthorKang, Tae-Goo-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorDigital combination of multiple current paths-
dc.subject.keywordAuthordroplet-volume-adjustable microinjector-
dc.subject.keywordAuthorinkjet printer-
dc.subject.keywordAuthorsingle microheater-
dc.subject.keywordPlusSATELLITE DROPS-
dc.subject.keywordPlusBUBBLE-GROWTH-
dc.subject.keywordPlusARRAY-
dc.subject.keywordPlusMODEL-
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