New sample cell configuration for wide-frequency dielectric spectroscopy: DC to radio frequencies

Nakanishi, Masato; Sasaki, Yasutaka; Nozaki, Ryusuke

doi:10.1063/1.3518940

Cited by 3 publications

(1 citation statement)

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“…In principle, methods for the dielectric spectroscopy of materials are available at frequencies up to the upper microwave region [374]. Currently, development is mainly directed to the refining of special sample cells or sensor designs [129,259,388,[396][397][398][399][400][401][402][403][404][405], often with a view to specific applications [259,388,397,401,[403][404][405], as well as to improvements of measurement methods and evaluation procedures [406][407][408][409][410][411][412]. Microwave 'laboratory-on-a-chip' devices [396,399], enabling the characterization of samples with volumes on a nanolitre scale, offer promising applications in biology, medicine and pharmaceutics.…”

Section: Topical Aspectsmentioning

confidence: 99%

Measuring the dielectric properties of materials. Ninety-year development from low-frequency techniques to broadband spectroscopy and high-frequency imaging

Kaatze

2012

Meas. Sci. Technol.

102

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The development of methods for measuring the dielectric properties of materials is reviewed with a special view to the background of the past 90 years. The close correlation between progress in measurement methods and scientific and technological advances is shown. The current state of techniques for the broadband dielectric spectroscopy of materials, covering the enormous range from about 10−5–1013 Hz, is reported. Also briefly presented are currently discussed methods for the scanning microwave microscopy as well as electrical tomography of objects. Reference to a wide spectrum of applications demonstrates the broad and diverse usability of dielectric measurement methods.

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Section: Topical Aspectsmentioning

confidence: 99%

Measuring the dielectric properties of materials. Ninety-year development from low-frequency techniques to broadband spectroscopy and high-frequency imaging

Kaatze

2012

Meas. Sci. Technol.

102

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Systematic study of the glass transition in polyhydric alcohols

Nakanishi

Nozaki

2011

Phys. Rev. E

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We have investigated the glass transitions of trihydric alcohols using broadband dielectric spectroscopy, and compare the results with those previously reported for sugar alcohols. Although a systematic glass transition feature related to molecular size has been reported for sugar alcohols, the essential factor governing this feature is still unclear because the number of carbon atoms (N C ) and the number of OH groups (N OH ) per molecule are identical in sugar alcohols. By examining trihydric alcohols (N C = N OH ), we conclude that N OH is dominant for the characteristics of the slow dynamics, such as fragility and glass transition temperature. This result suggests that the topological structure of the hydrogen-bonding network (coordination number) plays an important role in the glass transition of polyhydric alcohols. Furthermore, the orientational correlation factor evaluated using the Kirkwood-Fröhlich theory reveals a similarity in hydrogen bond formation among a variety of polyhydric alcohols. Based on these two experimental results, we discuss a possible physical picture of the glass transition of polyhydric alcohols.

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