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High sensitivity microwave characterization of organic molecule solutions of nanoliter volume
- Source :
- Applied physics letters 94, 112901 (2009). doi:10.1063/1.3097015
- Publication Year :
- 2009
- Publisher :
- AIP Publishing, 2009.
-
Abstract
- A microwave resonator composed of a sapphire cylinder and a quartz plate with a 400 nl cavity was developed for the determination of the complex permittivity of liquids at 10 GHz. This sensor was calibrated over a wide range of values for real and imaginary parts of permittivity. The measured resonator losses induced by the liquid were found to be proportional to the dipole relaxation time of the liquid molecules, as predicted by perturbation theory. Our analysis of weight concentration and temperature dependence of the measured inverse quality factor revealed a sensitivity of about 0.1% for aqueous solutions of glucose.
- Subjects :
- Permittivity
Physics and Astronomy (miscellaneous)
Chemistry
sapphire
Analytical chemistry
Q-factor
dielectric relaxation
permittivity
quartz
Resonator
Dipole
dielectric resonators
Volume (thermodynamics)
Q factor
Sapphire
Cylinder
ddc:530
chemical variables measurement
organic compounds
solutions
Microwave
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 94
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi.dedup.....a63aa73d63a85aab00208eb15551175a