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Chapter 27: Q9P (page 767)

Explain how the quartz crystal microbalance at the opening of Chapter 2 measures small masses

Short Answer

Expert verified

Quartz crystal microbalance measures the change in quartz crystal resonator frequency in order to measure the variation in mass per unit area.

Step by step solution

01

Define quartz crystal microbalance:

Quartz crystal microbalance measures the change in quartz crystal resonator frequency in order to measure the variation in mass per unit area. It consists of thin slice of quartz with two gold electrodes.

An exposure to oscillating electric field would cause the crystal to oscillate at different frequency. If we bind small masses to gold electrodes, it would increase the total mass and lower the frequency.

  • this change in frequency can tell us the mass of the bound compounds.

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