A quartz crystal microbalance (QCM) (also known as quartz microbalance (QMB), sometimes also as quartz crystal nanobalance (QCN)) measures a mass variation per unit area by measuring the change in frequency of a quartz crystal resonator.

What is Quartz Crystal Microbalance (QCM)? Molecular adsorption via the vacuum or gas phase typically results in rigid films that are fully coupled to the oscillation of the electrode surface.

The QCM200 Quartz Crystal Microbalance measures mass and viscosity in processes occurring at or near surfaces, or within thin films. This system includes a controller, crystal oscillator electronics, crystal holder, three quartz crystals, and Windows software.

Crystal Microbalance (QCM) technology and demonstrate the extremely sensitive nature of these piezoelectric devices towards mass changes at the surface of QCM electrodes. The results of his work are embodied in the Sauerbrey equation, which relates the …

2023年3月4日 · The QCM is an acoustic wave sensor [6, 7] that gained popularity due to its extreme sensitivity to mass changes in the nano-scale regime per unit area [6–9]. A typical QCM, as shown in Fig. 1, comprises an AT-cut quartz resonator disc sandwiched between key-hole-shaped metal electrodes and with a central sensor . The AT-cut quartz is a thin ...

The QCM-I unit is a high sensitivity mass sensor which measures the change in frequency of a quartz crystal resonator and as a label free biosensor it measures the “wet mass” of the adsorbed layer in processes occurring at or near the sensor surface. The measuring principle is based on impedance analysis of the quartz crystal.

Quartz Crystal Microbalance with Dissipation Monitoring (QCM-D) is a powerful sensing technique that allows researchers to investigate real time changes in nanoscale mass and viscoelastic properties of thin films at surfaces and interfaces.

2024年11月15日 · Knowing the nominal resonant frequency of a given resonator, an impedance or rather an admittance measurement is performed by the QCM at frequencies around the nominal resonant frequency. Plotting the real part of the admittance also known as the susceptance as a function of the frequency, we obtain the curve shown in Fig. 1 on the right.

What is Quartz Crystal Microbalance? The Quartz Crystal Microbalance (QCM), a recognized, sensitive technique, resulting in a mass variation per unit area by measuring changes in resonant frequency of a quartz crystal.

2018年3月14日 · The QCM200 System is a Quartz Crystal Microbalance (QCM) manufactured by Stanford Research Systems Inc. It measures the resonant frequency and series resistance of a 5 MHz, AT-cut quartz crystal. Resonant frequency changes as a linear function of the mass of material deposited on the crystal surface.