Q.85
Which of the following optical sensor works on the basis of mass change?
EXPLANATION
Rapid Detection & Biosensors in Dairy Microbiology: Optical, SPR, Piezoelectric & Impedance Sensors
- Mass-Sensitive Biosensors in Analytical Instrumentation:
- Piezoelectric Transducers (QCM):
- Work on the basis of mass changes; the fundamental resonant frequency of an anisotropic piezoelectric quartz crystal shifts in direct linear proportion to the minute mass ($\Delta m$) adsorbed onto its surface according to the Sauerbrey equation.
- Conclusion: Piezoelectric (Option 2).
Correct option: (2) Piezoelectric
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