What is quartz a measurement of?

Quartz Crystal Microbalance (QCM) is an extremely sensitive mass balance that measures nanogram to microgram level changes in mass per unit area. The heart of the technology is a quartz disc.

What is contact type thermometer?

A contact thermometer is a temperature measurement device that operates via direct contact between the magnetic end of the thermometer and the steel material surface of an unknown temperature to be determined.

How does a quartz balance work?

Therefore when an alternating electric field is applied over the electrodes in QCM, the quartz crystal starts to oscillate. The vibration motion of the quartz crystal establishes a transverse acoustic wave that propagates across the crystal and reflects back into the crystal at the surface.

How does a quartz sensor work?

To conclude, the QCM, which is a real-time, surface sensitive technique, monitors the change in mass or thickness of layers adhering to the surface of a quartz crystal. This is achieved by measuring the change in resonance frequency of the quartz crystal upon excitation by a driving voltage.

What is the difference between contact thermometers and non contact thermometers?

In general, there are two types of thermometers. Touch, or contact, thermometers must touch the body in order to measure temperature. Remote, or no contact, thermometers can measure body temperature without touching the skin.

What is a quartz crystal microbalance how is it useful during thin film deposition?

The quartz-crystal microbalance (QCM) is traditionally used as a thin-film deposition monitor. The most commonly used monitor crystal is AT-cut quartz vibrating in its thickness shear mode. This technique takes into account the mismatch of acoustic impedance between the quartz crystal and the deposited thin film.

Which type of biosensor quartz crystals are used?

A piezoelectric biosensor is based on the sensitivity of a quartz crystal microbalance, which is capable of detecting changes in the vibration frequency caused by a change in mass due to the binding of a target on its surface.

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