Mercury diffusion in gold and silver thin film electrodes on quartz crystal microbalance sensors.

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dc.contributor.authorSabri, YMen_AU
dc.contributor.authorIppolito, SJen_AU
dc.contributor.authorTardio, Jen_AU
dc.contributor.authorAtanacio, AJen_AU
dc.contributor.authorSood, DKen_AU
dc.contributor.authorBhargava, SKen_AU
dc.date.accessioned2009-11-08T23:46:07Zen_AU
dc.date.accessioned2010-04-30T05:04:36Zen_AU
dc.date.available2009-11-08T23:46:07Zen_AU
dc.date.available2010-04-30T05:04:36Zen_AU
dc.date.issued2009-03-28en_AU
dc.date.statistics2009-03-28en_AU
dc.description.abstractDiffusion behavior of mercury into both gold and silver electrodes of polished and roughened quartz crystal microbalances (QCMs) is presented. Several QCM devices were exposed to mercury vapor for 8 h and allowed to desorb for 5 h under controlled nitrogen atmosphere. The process was repeated for different Hg concentrations of 1.02, 1.87 and 3.65mg/m3 at an elevated temperature of 40 °C. The chemical composition and surface morphology of each QCM surface was characterized by Inductively Coupled Plasma Mass Spectroscopy (ICP-MS), Secondary Ion Mass Spectroscopy (SIMS), Atomic Force Microscope (AFM) and Field Emission Secondary Electron Microscope (FE-SEM). The Ag electrodeswere found to contain up to 16% more adsorbed/amalgamated Hg by mass than the Au samples. It was found that the ratio of amalgamated to adsorbed Hg is less for Au than Ag. SIMS analysis confirmed high Hg diffusion through rough substrates, 40 days after Hg exposure. In situ sticking probability of the tested mercury vapor concentrations to Au and Ag surfaces at 40 °C was found to drop at quicker rates than the reported Hg–Au and Hg–Ag room temperature values. Overall, in the context of Hg vapor phase gas sensing applications, the rougher gold substrate was found to outperform the other samples due to its superior adsorption/desorption properties. © 2008, Elsevier Ltd.en_AU
dc.identifier.citationSabri, Y. M., Ippolito, S. J., Tardio, J., Atanacio, A. J., Sood, D. K., & Bhargava, S. K. (2009). Mercury diffusion in gold and silver thin film electrodes on quartz crystal microbalance sensors. Sensors and Actuators B: Chemical, 137(1), 246-252. doi:10.1016/j.snb.2008.11.032en_AU
dc.identifier.govdoc1299en_AU
dc.identifier.issn0925-4005en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleSensors and Actuators B: Chemicalen_AU
dc.identifier.pagination246-252en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.snb.2008.11.032en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2232en_AU
dc.identifier.volume137en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectGolden_AU
dc.subjectSilveren_AU
dc.subjectMercuryen_AU
dc.subjectDiffusionen_AU
dc.subjectElectrodesen_AU
dc.subjectMicrobalancesen_AU
dc.titleMercury diffusion in gold and silver thin film electrodes on quartz crystal microbalance sensors.en_AU
dc.typeJournal Articleen_AU
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