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Chapter 20: Q8P (page 525)

Deuterated triglycine sulfate (abbreviated DTGS) is a common ferroelectric infrared detector material. Explain how it works.

Short Answer

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Deuterated triglycine sulfate (DTGS) has a permanent electric polarization as a result of alignment of the molecules in the crystal. One part of the crystal is positively charged, while the opposite side is negative. The polarization is temperature dependent, so when the crystal absorbs infrared radiation, its temperature and polarization (voltage difference) change. The change in voltage is the detector pyroelectric signal.

Step by step solution

01

Step: 1 Definition of the deuterated triglycine sulfate (DTGS):

A deuterated triglycine sulfate (DTGS) mid-infrared spectrometer showing large and automatic signals of electrical polarization when the infrared beam incident affects its separation.

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