High sensitivity microwave characterization of organic molecule solutions of nanoliter volume
- 16 March 2009
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 94 (11), 112901
- https://doi.org/10.1063/1.3097015
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.This publication has 12 references indexed in Scilit:
- Nanoliter liquid characterization by open whispering-gallery mode dielectric resonators at millimeter wave frequenciesJournal of Applied Physics, 2008
- Microwave dielectric resonator biosensor for aqueous glucose solutionReview of Scientific Instruments, 2008
- Noninvasive blood glucose measurement system based on three wavelengths in near-infrared regionProceedings of SPIE, 2007
- Room temperature measurement of the anisotropic loss tangent of sapphire using the whispering gallery mode techniqueIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2006
- The complex dielectric spectrum of heart tissue during ischemiaBioelectrochemistry, 2002
- Molecular Dynamics of Carbohydrate Aqueous Solutions. Dielectric Relaxation as a Function of Glucose and Fructose ConcentrationThe Journal of Physical Chemistry B, 2001
- Water−Ethanol Mixtures at Different Compositions and Temperatures. A Dieletric Relaxation StudyThe Journal of Physical Chemistry A, 2000
- The dielectric relaxation of water between 0°C and 35°CChemical Physics Letters, 1999
- Dielectric properties of single crystals of Al/sub 2/O/sub 3/, LaAlO/sub 3/, NdGaO/sub 3/, SrTiO/sub 3/, and MgO at cryogenic temperaturesIEEE Transactions on Microwave Theory and Techniques, 1994
- Equations for Calculating the Dielectric Constant of Saline Water (Correspondence)IEEE Transactions on Microwave Theory and Techniques, 1971