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Dynamics of Hydrogen Bonds in TGS Crystals Observed by Means of Measurements of Pyroelectric Currents Induced by Linear Changes of Temperature

100%
Trybus M., Paszkiewicz T., Woś B.
Acta Physica Polonica A
|
2017
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vol. 132
|
issue 1
161-163
EN
The study of pyroelectric response of monocrystalline TGS cubic specimens to changes of temperature induced by linear and pulse heating of three mutually perpendicular pairs of cube sides demonstrated a complicated structure of signals. We attribute their forms to the activation of various hydrogen bonds between glycine G1, G2, and G3 molecules. In the case of pulse heating the pyroelectric signal is observed also in the paraelectric phase.
2
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Measuring of Electric Parameters of Graphene in Presence of Temperature Gradient

100%
Inglot M., Trybus M., Woś B., Ciuk T.
Acta Physica Polonica A
|
2015
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vol. 128
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issue 2
166-169
EN
Graphene is one of the most promising materials for application in electronics. It has been recently discovered that on certain substrates graphene is characterized by a rather strong spin-orbit interaction, which is valuable to spintronics applications. In this paper we present an application of a system for measuring of graphene's electrical parameters. The idea of a measuring system originates from the measurements of the pyroelectric coefficient of ferroelectric samples. After a simple modification the system can be used for various experiments related to the determination of electric response of samples exposed to a temperature gradient. Test measurements of monolayer graphene samples and their thermoelectric response are presented.
3
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The Influence of Sonication and Silver Nanoparticles Doped on Viscoelastic Structure of Agarose Gel

52%
Żyła G., Stompor M., Kopańska M., Stagraczyński R., Fal J., Traciak J., Trybus M., Wolski S., Zawlik I., Cebulski J., Konefał-Janocha M., Cholewa M.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 1
152-154
EN
The paper presents result of experimental measurements of viscoelastic properties of agarose gel after sonication and with silver nanoparticles doped. Researches were conducted using a HAAKE MARS 2 rheometer (Thermo Electron Corporation, Karlsruhe, Germany), with serrated plate-plate measuring geometry. Viscoelastic properties of samples were measured with oscillation tests at constant deformation rate 0.1%, and frequency 1 Hz in the temperature range from 278 to 348 K. It was presented that using the sonication before solidification of gel results in increases of the storage modulus and complex viscosity of the solidified gel. It was also presented that when silver nanoparticles are doped into agarose gel, storage modulus and complex viscosity start to decrease at lower temperature.
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