prof. UAM dr hab. Mikołaj Pochylski
Zainteresowania naukowe
- Dynamika i struktura materii miękkiej (ciecze przechłodzone i szkliwa, układy samo-organizujące)
- Płyny w zewnętrznych polach fizycznych (magnetycznie i elektrycznie indukowana orientacja, elektro-reologia)
- Optyczne metody eksperymentalne (rozpraszanie światła, polarymetria, mikroskopia)
Współpraca z zagranicznymi ośrodkami naukowymi
- Institute for Physico-Chemical Processes, National Council of Science (CNR), Messina, Italy
- Institute for Nanostuctured Materials, National Council of Science (CNR), Rome, Italy
Wykształcenie
- 1996: Zespół Szkół Elektrycznych nr2, ul. Świt 25 (Elektromechanik urządzeń przemysłowych)
- 2001: Magister Fizyki, Wydział Fizyki UAM
- 2006: Doktor Fizyki, Wydział Fizyki UAM
- 2017: Doktor habilitowany, Wydział Fizyki UAM
Inne informacje
- Skarbnik Oddziału poznańskiego Polskiego Towarzystwa Fizycznego
- Certyfikowany programista LabVIEW, Certified LabVIEW Associate Developer (CLAD), 2010
2007
Pochylski, Mikołaj; Aliotta, F; Błaszczak, Z; Gapiński, J
High-Frequency Dynamical Behavior of Poly(ethylene glycol)+H2O Mixtures by Brillouin Spectroscopy Journal Article
In: Macromolecular Symposia, vol. 251, no. 1, pp. 47-53, 2007, ISSN: 1521-3900.
Abstract | Links | BibTeX | Tagi: Brillouin scattering, mechanical properties, Polyethylene glycol, relaxation
@article{MASY:MASY200750507,
title = {High-Frequency Dynamical Behavior of Poly(ethylene glycol)+H2O Mixtures by Brillouin Spectroscopy},
author = {Mikołaj Pochylski and F Aliotta and Z Błaszczak and J Gapiński},
url = {http://dx.doi.org/10.1002/masy.200750507},
doi = {10.1002/masy.200750507},
issn = {1521-3900},
year = {2007},
date = {2007-01-01},
journal = {Macromolecular Symposia},
volume = {251},
number = {1},
pages = {47-53},
publisher = {WILEY-VCH Verlag},
abstract = {Brillouin spectroscopy has been used to examine high-frequency dynamical behavior of aqueous solutions of poly(ethylene glycol) (Mw ≈ 400g/mol) at 298K in the entire concentration region. It was found that a relaxation process takes place in the experimental frequency window that significantly affects the shape of experimentally recorded spectrum of the density fluctuations (dynamical structure factor). The process detected was attributed to segmental motion of the flexible polymeric chain. The full spectrum analysis of Brillouin spectra has been performed taking advantage of the relaxation function previously used in describing a single relaxation process in dielectric examination of water solutions of PEG 400. The proposed data processing procedure permits a qualitative reproduction of concentration dependencies of the hypersonic wave velocity and absorption measured. The shapes of the concentration dependencies of the relaxation times obtained from the Brillouin and the dielectric spectroscopies are in good agreement over a very broad concentration range, although their absolute values are scaled by the factor of 3. This result indicate that the two processes revealed independently by dielectric and Brillouin spectroscopies, apparently separated in time-scale, are just the same relaxation process.},
keywords = {Brillouin scattering, mechanical properties, Polyethylene glycol, relaxation},
pubstate = {published},
tppubtype = {article}
}
Brillouin spectroscopy has been used to examine high-frequency dynamical behavior of aqueous solutions of poly(ethylene glycol) (Mw ≈ 400g/mol) at 298K in the entire concentration region. It was found that a relaxation process takes place in the experimental frequency window that significantly affects the shape of experimentally recorded spectrum of the density fluctuations (dynamical structure factor). The process detected was attributed to segmental motion of the flexible polymeric chain. The full spectrum analysis of Brillouin spectra has been performed taking advantage of the relaxation function previously used in describing a single relaxation process in dielectric examination of water solutions of PEG 400. The proposed data processing procedure permits a qualitative reproduction of concentration dependencies of the hypersonic wave velocity and absorption measured. The shapes of the concentration dependencies of the relaxation times obtained from the Brillouin and the dielectric spectroscopies are in good agreement over a very broad concentration range, although their absolute values are scaled by the factor of 3. This result indicate that the two processes revealed independently by dielectric and Brillouin spectroscopies, apparently separated in time-scale, are just the same relaxation process.