A microreactor using surface acoustic wave as energy source

Zha, Yan; Zhang, An-Liang

doi:10.1109/spawda.2012.6464074

Cited by 1 publication

(2 citation statements)

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“…Finally, we highlight that the deviation from this inverse proportionality of the relaxation time for 100% glycerol (η = 612 cP) is due to the elastic wave heating effects (Figure 7) that have been observed for highly viscous liquids (i.e., pure glycerol). 47,48 For low viscous liquids (i.e., for η ≤ 109 cP) the proposed device does not require temperature monitoring. Nonetheless, we anticipate that future versions of the device will include temperature control capability.…”

Section: Resultsmentioning

confidence: 99%

“…When subjected to SAWs, highly viscous liquids (e.g., 100% glycerol) undergo rapid heating. Figure S3 shows the changes in viscosity induced by the heat generated after 5 s SAW actuation, consistent with results reported by Zha et al 47 and Shilton et al 48 Figure S4 also provides an example of infrared images used to evaluate the temperature of the films.…”

Section: Resultsmentioning

confidence: 99%

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Computational Image Analysis of Guided Acoustic Waves Enables Rheological Assessment of Sub-nanoliter Volumes

et al. 2019

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We present a method for the computational image analysis of high frequency guided sound waves based upon the measurement of optical interference fringes, produced at the air interface of a thin film of liquid. These acoustic actuations induce an affine deformation of the liquid, creating a lensing effect that can be readily observed using a simple imaging system. We exploit this effect to measure and analyze the spatiotemporal behavior of the thin liquid film as the acoustic wave interacts with it. We also show that, by investigating the dynamics of the relaxation processes of these deformations when actuation ceases, we are able to determine the liquid’s viscosity using just a lens-free imaging system and a simple disposable biochip. Contrary to all other acoustic-based techniques in rheology, our measurements do not require monitoring of the wave parameters to obtain quantitative values for fluid viscosities, for sample volumes as low as 200 pL. We envisage that the proposed methods could enable high throughput, chip-based, reagent-free rheological studies within very small samples.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%