Chaoticity analysis of the current through pure, hydrogenated and hydrophobically modified PEG-Si thin films under varying relative humidity

• Authors: Kaan Atak , Ozgur Aybar , Gokhan Şahin , Avadis Hacınlıyan , Yani Skarlatos
• Languages of publication: EN

Abstracts

EN

Polyethylene Glycol has an irregular current characteristic under constant voltage and slowly varying relative humidity. The current through a thin film of Gamma-isocyanatopropyltriethoxysilane added Polyethylene glycol (PEG-Si), its hydrogenated and hydrophobically modified forms, as a function of increasing relative humidity at equal time steps is analyzed for chaoticity. We suggest that the irregular behavior of current through PEG-Si thin films as a function of increasing relative humidity could best be analyzed for chaoticity using both time series analysis and detrended uctuation analysis; the relative humidity is kept as a slowly varying parameter. The presence of more then one regime is suggested by the calculation of the maximal Lyapunov exponents. Furthermore, the maximal Lyapunov exponent in each of the regimes was positive, thus confirming the presence of low dimensional chaos. DFA also confirms the presence of at least two different regimes, in agreement with the behavior of the maximal Lyapunov exponent in the time series analysis. We also suggest that the irregular behavior of the current through PEG-Si can be reduced by hydrogenating and hydrophobically modifying PEG-Si and the improvement in stability can be confirmed by our study.

Keywords

EN

chaos; nonlinear time series analysis; detrended fluctuation analysis; polyethylene glycol

Discipline

• 05.: Statistical physics, thermodynamics, and nonlinear dynamical systems(see also 02.50.-r Probability theory, stochastic processes, and statistics)
• 05.10.-a: Computational methods in statistical physics and nonlinear dynamics(see also 02.70.-c in mathematical methods in physics)
• 05.45.-a: Nonlinear dynamics and chaos(see also section 45 Classical mechanics of discrete systems; for chaos in fluid dynamics, see 47.52.+j; for chaos in superconductivity, see 74.40.De)
• 05.45.Tp: Time series analysis
• 61.25.hp: Polymer swelling, cross linking

• Journal: Open Physics
• Year: 2009
• Volume: 7
• Issue: 3
• Pages: 568-574

Dates

published

1 - 9 - 2009

online

25 - 6 - 2009

Contributors

author

Kaan Atak

• Department of Physics, Boğgaziçi University, İstanbul, Turkey,

author

Ozgur Aybar

author

Gokhan Şahin

• Department of Information Systems and Technologies, Yeditepe University, İstanbul, Turkey

author

Avadis Hacınlıyan

author

Yani Skarlatos

• Department of Physics, Boğgaziçi University, İstanbul, Turkey

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Identifiers

DOI

10.2478/s11534-009-0034-8