Theoretical predictions for the mechanical response of a model quartz crystal microbalance to two viscoelastic media: A thin sample layer and surrounding bath medium

1999 ◽  
Vol 111 (24) ◽  
pp. 11192-11206 ◽  
Author(s):  
Christopher C. White ◽  
John L. Schrag
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Mechanical Response ◽  
Thin Sample ◽  
Viscoelastic Media ◽  
Theoretical Predictions ◽  
Bath Medium

Study of Frequency Response of Quartz Crystal Microbalance to Different Wetting States of Micropillar Surfaces

2017 ◽  
Author(s):  
Junwei Su ◽  
Hamed Esmaeilzadeh ◽  
Hongwei Sun
Keyword(s):  
Quartz Crystal Microbalance ◽  
Nanoimprint Lithography ◽  
Quartz Crystal ◽  
Beam Theory ◽  
Frequency Shifts ◽  
Highly Nonlinear ◽  
Wide Range ◽  
Theoretical Predictions ◽  
Potential Applications ◽  
Order Of Magnitude

Enhanced wettability, known as superhydrophobicity or superhydrophilicity has drawn extensive attention in the past for wide range potential applications such as superhydrophobic surfaces for self-cleaning, anti-icing, dropwise condensation, and drag reduction. This research focuses on the investigation of the frequency responses of quartz crystal microbalance (QCM) devices coated with micropillars to the different wetting states of drops. A theoretical model was developed to correlate the resonant frequency shifts of QCMs with the penetrated (Wenzel state) and suspended (Cassie state) states based on the Euler-Bernoulli beam theory. In the experimental validation of the theory, Poly(methyl methacrylate) (PMMA) micropillars were fabricated on the QCMs using nanoimprint lithography (NIL) method and the different wetting states were generated by plasma treatment and chemical coating. The frequency shifts of the QCM device were measured by a network analyzer. A good agreement between experimental measurements and theoretical predictions was obtained. It was found that the micropillars operating in the penetrated state results in one order of magnitude higher frequency shift of QCM than the micropillars in suspended state. There exists a highly nonlinear vibrating behavior of micropillars with different heights in both penetrated and suspended states. The QCM based technology is a valuable tool for studying the wettability of different superhydrophobic or superhydrophilic surfaces.

New Groove Structures for Miniature Quartz Crystal Microbalance with Low Crystal Impedance

2012 ◽  
Vol 538-541 ◽  
pp. 2461-2465
Author(s):  
Zong Han Liu ◽  
Chih Hsiung Shen
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Mechanical Response ◽  
Piezoelectric Effect ◽  
Effective Area ◽  
The Other ◽  
Q Value ◽  
Innovative Design ◽  
Groove Structure ◽  
Piezoelectric Performance

Throughout the world, there are numerous of studies on quartz crystal microbalance (QCM). Today, we come up with a new way to reduce both the size of QCM structure and the crystal impedance without lowering the sensitivity. Beyond the conventional design of QCM originally developed in recent years, a new disk shape with multi-groove structures is proposed and investigated thoroughly to realize the miniaturized QCM. Along the miniaturization stage, there are two main approaches to remain the efficiency of vibration. One is to improve the piezoelectric effect which can be further increased by reducing the distance of electric field and the other is to improve the effective area of electric potential flow between the electrodes. Several proposed design with grooves in the disk has been proposed to make effective area larger, crystal impedance lower ,and Q value higher. We will investigate between different groove structures on QCM under the same bias voltage. In this study, we propose and verify the innovative design of QCM and a thorough investigation of the electric and mechanical response were performed with evidence marvelous efficiency. Consequently, the three groove structure gives the best piezoelectric performance than the other.

Interaction of Clear Flavor Emulsions Containing Lemon Essential Oils with Lipid Bilayers via a Quartz Crystal Microbalance

2019 ◽  
Vol 25 (6) ◽  
pp. 879-884
Author(s):  
Takahiro Sakai ◽  
Hayato Seki ◽  
Shogo Yoshida ◽  
Hayato Hori ◽  
Hisashi Suzuki ◽  
...  
Keyword(s):  
Essential Oils ◽  
Lipid Bilayers ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal

Effect of Current Distribution on Quartz Crystal Microbalance Measurements

1998 ◽  
Vol 145 (2) ◽  
pp. 492-497 ◽  
Author(s):  
James J. Kelly ◽  
K. M. Anisur Rahman ◽  
Christopher J. Durning ◽  
Alan C. West
Keyword(s):  
Quartz Crystal Microbalance ◽  
Current Distribution ◽  
Quartz Crystal

scholarly journals Unraveling cardiolipin-induced conformational change of cytochrome c through H/D exchange mass spectrometry and quartz crystal microbalance

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sin-Cih Sun ◽  
Hung-Wei Huang ◽  
Yi-Ting Lo ◽  
Min-Chieh Chuang ◽  
Yuan-Hao Howard Hsu
Keyword(s):  
Mass Spectrometry ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Interaction Model ◽  
Moderate Increase ◽  
Exchange Mass Spectrometry ◽  
Mitochondrial Regulation ◽  
Crucial Component ◽  
Drastic Increase ◽  
Hydrogen Deuterium

AbstractCardiolipin (CL), a crucial component in inner mitochondrial membranes, interacts with cytochrome c (cyt c) to form a peroxidase complex for the catalysis of CL oxidation. Such interaction is pivotal to the mitochondrial regulation of apoptosis and is affected by the redox state of cyt c. In the present study, the redox-dependent interaction of cyt c with CL was investigated through amide hydrogen/deuterium exchange coupled with mass spectrometry (HDXMS) and quartz crystal microbalance with dissipation monitoring (QCM-D). Ferrous cyt c exhibited a more compact conformation compared with its ferric form, which was supported by the lower number of deuterons accumulated and the greater amplitude reduction on dissipation. Upon association with CL, ferrous cyt c resulted in a moderate increase in deuteration, whereas the ferric form caused a drastic increase of deuteration, which indicated that CL-bound ferric cyt c formed an extended conformation. These results were consistent with those of the frequency (f) − dissipation (D) experiments, which revealed that ferric cyt c yielded greater values of |ΔD/Δf| within the first minute. Further fragmentation analysis based on HDXMS indicated that the effect of CL binding was considerably different on ferric and ferrous cyt c in the C-helix and the Loop 9–24. In ferric cyt c, CL binding affected Met80 and destabilized His18 interaction with heme, which was not observed with ferrous cyt c. An interaction model was proposed to explain the aforementioned results.

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