Detection of phase transition in polyethylene glycol using a multimodal micromechanical acoustic resonator
Accepted version
Peer-reviewed
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Authors
Prasad, A
Seshia, AA
Abstract
© 2017 Author(s). A piezoelectrically transduced micromechanical beam acoustic resonator is utilized to detect solid to liquid phase transitions in sub-nanoliter volume of Polyethylene Glycol (PEG) 1000. A lower frequency flexural mode and a higher frequency length-extensional mode are simultaneously monitored for changes in the device response. The phase transition of the PEG drop perturbs the acoustic loading of the resonator, bringing about characteristic and repeatable changes in the frequency response. The phase transitions in the drop are verified optically, and the resonant parameters are compared with the control case when the resonator is pristine without the presence of any PEG drop.
Description
Keywords
51 Physical Sciences, 5103 Classical Physics
Journal Title
Applied Physics Letters
Conference Name
Journal ISSN
0003-6951
1077-3118
1077-3118
Volume Title
110
Publisher
AIP Publishing