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dc.contributor.authorKhaw, Mei-Kum
dc.contributor.authorMohd-Yasin, Faisal
dc.contributor.authorNam-Trung, Nguyen
dc.date.accessioned2019-06-19T13:01:21Z
dc.date.available2019-06-19T13:01:21Z
dc.date.issued2018
dc.identifier.issn1424-8220
dc.identifier.doi10.3390/s18061767
dc.identifier.urihttp://hdl.handle.net/10072/380480
dc.description.abstractWe present the mixing and merging of two reactive droplets on top of an open surface. A mobile droplet (1.0 M HCl solution + iron oxide particles) is magnetically-actuated to merge with a sessile droplet (1.0 M NaOH + phenolphthalein). The heat from the exothermic reaction is detected by a thermocouple. We vary the droplet volume (1, 5 and 10 μL), the magnet speed (1.86, 2.79, 3.72 and 4.65 mm/s) and the iron oxide concentration (0.010, 0.020 and 0.040 g/mL) to study their influences on the mixing time, peak temperature and cooling time. The sampled recording of these processes are provided as supplementary files. We observe the following trends. First, the lower volume of droplet and higher speed of magnet lead to shorter mixing time. Second, the peak temperature increases and cooling time decreases at the increasing speed of magnet. Third, the peak temperature is similar for bigger droplets, and they take longer to cool down. Finally, we also discuss the limitations of this preliminary study and propose improvements. These observations could be used to improve the sensitivity of the open chamber system in measuring the exothermic reaction of biological samples.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherMDPI
dc.publisher.placeSwitzerland
dc.relation.ispartofchapter1767
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto13
dc.relation.ispartofissue6
dc.relation.ispartofjournalSensors
dc.relation.ispartofvolume18
dc.subject.fieldofresearchBiological physics
dc.subject.fieldofresearchAnalytical chemistry
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchElectrical engineering
dc.subject.fieldofresearchElectronics, sensors and digital hardware
dc.subject.fieldofresearchEnvironmental management
dc.subject.fieldofresearchDistributed computing and systems software
dc.subject.fieldofresearchcode510501
dc.subject.fieldofresearchcode3401
dc.subject.fieldofresearchcode3103
dc.subject.fieldofresearchcode4008
dc.subject.fieldofresearchcode4009
dc.subject.fieldofresearchcode4104
dc.subject.fieldofresearchcode4606
dc.titleMagnetically-actuated mixing and merging of acid-base micro-droplets on open surfaces: Preliminary study
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by/4.0/
dc.description.versionVersion of Record (VoR)
gro.facultyGriffith Sciences, School of Engineering and Built Environment
gro.rights.copyright© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorMohd-Yasin, Faisal
gro.griffith.authorNguyen, Nam-Trung


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