Effect of wetting states on frequency response of a micropillar-based quartz crystal microbalance

Su, Jun-Wei; Esmaeilzadeh, Hamed; Wang, Pengtao; Ji, Siqi; İnalpolat, Murat; Charmchi, Majid; Sun, Hongwei

doi:10.1016/j.sna.2018.12.012

Cited by 19 publications

(15 citation statements)

References 44 publications

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“…Quartz Crystal Microbalance (QCM) is an acoustic-wave device with high sensitivity to changes in mass, and therefore, enables the detection of minute mass gain or losses associated with interfacial processes like adsorption/desorption. 101,122 The device consists of a vibrating quartz crystal resonator, with a gold electrode laying above it (Fig. 13a).…”

Section: Acoustic Methodsmentioning

confidence: 99%

“…101 Owning to its high sensitivity and accuracy, the technique has been applied in detecting wetting transitions. 105,[122][123][124] Wave propagation into the liquid forces an amplitude decay, therefore, higher liquid penetrations lead to lower frequency shifts. 101 This mechanism allows detection of Cassie, Wenzel and intermediate states with high differentiation ability, albeit as a bulk measurement across the entire material.…”

Section: Acoustic Methodsmentioning

confidence: 99%

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The challenges, achievements and applications of submersible superhydrophobic materials

et al. 2021

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Section: Acoustic Methodsmentioning

confidence: 99%

Section: Acoustic Methodsmentioning

confidence: 99%

The challenges, achievements and applications of submersible superhydrophobic materials

et al. 2021

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“…In brief, QCM drives a quartz crystal to its resonant frequency. As mass is added to the crystal surface, or the density, viscosity, or surface tension, or interfacial wetting of the surrounding medium changes, the resonant behavior of the quartz crystal changes [ 17 , 18 , 19 , 20 ]. Originally designed to measure the adsorption of gases to the crystal surface, the Sauerbrey equation relates the decrease in resonant frequency to the adsorbed mass [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Water Content of Polyelectrolyte Multilayer Films Measured by Quartz Crystal Microbalance and Deuterium Oxide Exchange

Kittle

Levin

2021

Sensors

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Water content of natural and synthetic, thin, polymer films is of considerable interest to a variety of fields because it governs properties such as ion conductivity, rigidity, porosity, and mechanical strength. Measuring thin film water content typically requires either complicated and expensive instrumentation or use of multiple instrumental techniques. However, because a quartz crystal microbalance (QCM) is sensitive to changes in mass and viscosity, deuterated solvent exchange has emerged as a simple, single-instrument, in situ method to quantify thin film water content. Relatively few studies, though, have employed this technique to measure water content of polyelectrolyte multilayers formed by layer-by-layer (LbL) assembly. In this work, poly (allyl amine) (PAH) and poly (styrene sulfonate) (PSS) films of up to nine layers were formed and the water content for each layer was measured via QCM with deuterium oxide exchange. The well-characterized nature of PAH/PSS films facilitated comparisons of the technique used in this work to other instrumental methods. Water content results showed good agreement with the literature and good precision for hydrated films thicker than 20 nm. Collectively, this work highlights the utility, repeatability, and limitations of this deuterated exchange technique in measuring the solvent content of thin films.

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“…Undoubtedly, the quartz crystal microbalance (QCM) is one of the appropriate piezoresonance sensors that can track any water freezing events in a highly sensitive and reproducible manner, since it reacts instantly to negligible changes in the mass added to its surface (absolute sensitivity of ng/cm 2 ) [ 22 ] and to viscosity–density alterations in the liquids [ 23 , 24 , 25 ] or surface tension and wettability variations [ 26 , 27 , 28 ]. Furthermore, the QCM is provenly efficient in sensing the water’s phase transitions [ 29 , 30 , 31 ] and defining the anti-icing characteristics of superhydrophobic surfaces [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Studying the Bulk and Contour Ice Nucleation of Water Droplets via Quartz Crystal Microbalances

Esmeryan

Stoimenov

2021

Micromachines

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Due to the stochastic and time-dependent character of the ice embryo formation and growth (i.e., a process that can be analyzed statistically, but cannot be predicted precisely), the heterogeneous ice nucleation on atmospheric aerosols or macroscopic solid surfaces is still shrouded in mystery, regardless of the extremely active research and exponential progress within this scientific field. For instance, whether the icing appears from outside-in or inside-out is a subject of intense controversy, with practicability in designing passive icephobic coatings or improving the effectiveness of the cryopreservation technologies. Here, we propose an artful technique for quantitative analysis of the different modes of water freezing using super-nonwettable soot-coated quartz crystal microbalances (QCMs). To achieve this goal, a set of 5 MHz QCMs are loaded one at a time with a 50 μL droplet, whose bulk or contour solidification is detected in real-time. The obtained experimental results show that our sensor devices recognize explicitly if the ice nuclei form predominantly at the liquid–solid interface or spread along the droplet’s entire outer shell by triggering individual reproducible responses in terms of the direction of signal evolution in time. Our results may serve as a foundation for the future incorporation of QCM devices in different freezing assays, where gaining information about the ice adhesion forces and ice layer’s thickness is mandatory.

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Effect of wetting states on frequency response of a micropillar-based quartz crystal microbalance

Cited by 19 publications

References 44 publications

The challenges, achievements and applications of submersible superhydrophobic materials

The challenges, achievements and applications of submersible superhydrophobic materials

Water Content of Polyelectrolyte Multilayer Films Measured by Quartz Crystal Microbalance and Deuterium Oxide Exchange

Studying the Bulk and Contour Ice Nucleation of Water Droplets via Quartz Crystal Microbalances

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