ACTA

Controlling the Network Properties of Polymer Matrices for Improvement of Amperometric Enzyme Biosensors: Contribution of Positron Annihilation

T. Kavetskyy^{a, b}, Y. Kukhazh^b, K. Zubrytska^b, O. Smutok^c, O. Demkiv^c, M. Gonchar^c, O. Šauša^d, H. Švajdlenková^e, S. Kasetaite^f, J. Ostrauskaite^f, V. Boev^g, V. Ilcheva^g, T. Petkova^g
^aThe John Paul II Catholic University of Lublin, Al. Racławickie 14, 20-950 Lublin, Poland
^bDrohobych Ivan Franko State Pedagogical University, I. Franko Str. 24, 82100 Drohobych, Ukraine
^cInstitute of Cell Biology, National Academy of Sciences of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine
^dInstitute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovak Republic
^ePolymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovak Republic
^fKaunas University of Technology, Radvilenu rd. 19, 50254 Kaunas, Lithuania
^gInstitute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl. 10, 1113 Sofia, Bulgaria

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Recent results obtained by studies on the network properties using positron annihilation lifetime spectroscopy and swelling measurements in the ureasil-based and photocross-linked polymer matrices are compared. Common features observed are the larger difference (α_F2-α_F1) of the coefficients for the thermal expansion of free-volume holes α_F1, α_F2 below and above T_g, respectively, in the polymer matrices, the highest sensitivity of the amperometric enzyme biosensors constructed based on the polymer matrices. It is suggested that the correlation found may be more general. It seems, therefore, that controlling the network properties of polymer matrices suitable for construction of amperometric enzyme biosensors by examining (α_F2-α_F1) magnitude in temperature dependent positron annihilation lifetime spectroscopy experiment may be used for improvement of operational parameters of such sensors.

DOI:10.12693/APhysPolA.137.246
topics: ureasil-based polymers, photocross-linked polymers, positron annihilation, biosensors