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Showing 1 to 20 of 42 for “"quartz crystal microbalance (QCM)"”.
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Quartz Crystal Microbalance Studies of Dimethyl Methylphosphonate Sorption Into Trisilanolphenyl-Poss Films
… determinations [1]. In our study, the quartz crystal microbalance (QCM) is used to study the sorption phenomena of DMMP into highly ordered Langmuir-Blodgett (LB) films of TPP. In a saturated environment, DMMP sorbs into the TPP films, binding to TPP in a 1:1 molar ratio. Although …
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Development and characterization of a novel drug dissolution test method using a quartz crystal microbalance
… testing methodology developed using a commercial quartz crystal microbalance (QCM) system to measure dissolution rates of drugs while overcoming the limitations of current dissolution methods. The apparatus was characterized for a sample drug system of benzoic acid dissolved using a dissolution …
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The use of model compounds to investigate the influence of fuel composition on the thermo-oxidative stability of fame/diesel blends
… performed at 140° C. The systems used were a quartz crystal microbalance (QCM) in which oxygen was limited and open glass flasks under flowing air (unlimited oxygen). To simplify analysis, diesel model compound systems were used in which full boiling range diesel was replaced with single …
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Temperature-Enhanced Low-Energy Ion Sputtering of Liquid Tin: Measurements and Modeling
… using a well-characterized ion beam and a quartz-crystal microbalance (QCM) show that while the sputtering yield of Sn under 1000 eV He+ bombardment at 45° incidence increased from 0.33 +/- 0.14 to 0.80 +/- 0.24 atoms/ion due to increasing the sample temperature from 250°C to …
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Characterization of nano-scaled metal-hydrides confined in nano-porous carbon frameworks
… gas analyzer (RGA), the low temperature stage quartz crystal microbalance (QCM), the high temperature heating stage, and two vacuum chambers separated by a small flow hole which allows a direct line-of-site to the RGA"--Abstract, page iv.
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Diagnostics for ionized physical vapor deposition chambers
… a combined gridded energy analyzer (GEA) and a quartz crystal microbalance (QCM), with a high aspect ratio collimator in place of the normal electron repeller grid for angular measurement distribution measurements. The collimator is made of copper elements with 500μm nominal openings which …
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Use of a quartz crystal microbalance to investigate the mechanical stability of silica xerogel membranes for volatile iodine capture
… to a gas stream and used adhesive-coated quartz crystal, connected to a quartz crystal microbalance (QCM), to collect the particles lost by the adsorbents under flow. Collection of particles change the crystal's resonance, and the change is recorded on the QCM. The QCM data is analyzed to …
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Characterising room temperature ionic liquids with acoustic wave devices
… methods for processing smaller sample volumes. Quartz crystal impedance analysis has been used to assess whether room temperature ionic liquids behave in a Newtonian manner to determine the values of their square root viscosity-density product using small volumes. Values are compared to …
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Mechanisms of MS2 bacteriophage removal by ultrafiltration membrane with different foulants
… compared to that for the pristine membrane. Quartz crystal microbalance (QCM) results showed faster kinetics of MS2 adhesion to the pristine membrane compared to the SMP-fouled membrane. In agreement with QCM results, an attractive force between MS2 and the pristine membrane was detected …
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Semen quality detection using acoustic wave sensors
… of flight (ToF) technique which makes use of a quartz crystal microbalance (QCM), operating at 5 MHz, as the sensing element. Data is shown developing a device where a 50 μl sample of boar sperm is added to a liquid filled swim channel, which the sperm are allowed to self-propel down and attach …
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QCM Aptasensor for Rapid and Specific Detection of Avian Influenza Virus
… H5N1 using aptamers as biosensing material and a quartz crystal microbalance (QCM) for transducing method. Specific DNA aptamers against AIV H5N1 were immobilized, through biotin and streptavidin conjugation, onto the gold surface of QCM sensor to capture the target virus. Magnetic nanobeads (150 …
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Surface kinetics modeling of silicon oxide etching in fluorocarbon plasmas
… using measured etching yield data determined by quartz crystal microbalance (QCM) in conjunction with plasma neutral and ion concentrations/fluxes determined by mass spectrometry. The etching and deposition rates have been measured as functions of ion impinging angle, sample temperature, which …
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Potencialo poveikio vandeninio tirpalo sluoksnio prie polimerinio paviršiaus savybėms tyrimas kvarco rezonatoriaus admitanso metodu /
Quartz Resonator Admittance Study of Potential Effect on the Properties of Aqueous Solution Layer at Polymeric Surface By utilizing the methods of electrochemical impedance spectroscopy and quartz crystal microbalance (QCM) it was determined that the minima of density viscosity products of …
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Acoustic resonators with integrated microfluidic channels for ultra-high Q-factor: a new paradigm for in-liquid gravimetric detection
… acoustic damping due to the viscous layer. The quartz crystal microbalance (QCM) was selected as the model system for implementing the new paradigm due to its widespread usage in various applications, simplicity, cost-effectiveness, and relevance of its principles to other types of acoustic …
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Investigations of Asphaltene-Metal Interactions
… surfaces. A relatively novel technique called quartz crystal microbalance (QCM) was employed to study the kinetics of asphaltene adsorption and the data analyzed to estimate the adsorption isotherm. The X-ray photoelectron spectroscopy (XPS) technique was employed to determine the functional …
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Engineering Superparamagnetic Iron Oxide Nanoparticles for Environmental Applications
… vs. hydrophobic) are described using quartz crystal microbalance (QCM) based techniques, among others, highlighting critical aspects of interfacial dynamics for these systems. Finally, IONPs are demonstrated as a platform material for uranyl sorption and separation from water. …
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Polypyrrole modified with sulfated β-cyclodextrin: characterization and application in the sensing of viologens
… confirmed by means of cyclic voltammetry (CV), quartz crystal microbalance (QCM) and differential scanning calorimetry (DSC). The large dopant was found not to significantly alter certain properties of the polymer such as diffusion of a probe analyte to the surface and charge transfer rate …
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Antibacterial calcite created with a multilayer polyelectrolyte coating method
… bacteria and kill them. Thus, single calcite crystals and the mineral particles are coated with selected polyelectrolytes. A multilayer approach is employed to increase the coverage of the calcite surfaces and slow-down mineral dissolution. The polyelectrolyte multilayer significantly …
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Magnetic quartz crystal microbalance
In this thesis, a new technique for using quartz crystal microbalance (QCM) in magnetic field was explored. This technique would take advantage of the sensitive nature of QCM to vibration changes. The idea is to perturb the QCM vibrations with magnetic materials on it by applying magnetic field. A …
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INVESTIGATION OF BIOMOLECULAR INTERACTIONS FOR DEVELOPMENT OF SENSORS AND DIAGNOSTICS
… in the biophysical study of this system. A quartz crystal microbalance (QCM) was used to detect protein targets at the bulk level and the affinities and binding kinetics of these systems were analyzed. Along with AFM-based force spectroscopy, ensemble-averaging properties and molecular …
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