Dichroism of Poly(Methyl Methacrylate) Thin Films Doped with Disperse Orange 11 Molecules

• Authors: B. Abbas , M. Alshikh Khalil
• Languages of publication: EN

Abstracts

EN

We investigate the absorption spectra of poly (methyl methacrylate) (PMMA) thin films doped with Disperse Orange 11 (DO11) dye molecules which change under illumination with visible light. Dichroism measurements of the kinetics of the transmission changes at 472 nm at room and low temperatures (-60° C ± 2 °C) have been investigated. Our data show that the photoisomerisation reaction and the light-induced polar orientation depend on the molecular structure of the polymer. Simultaneous UV-visible spectroscopy at low temperature confirms the existence of two forms of DO11 molecules (keto and enol forms), which are responsible for the interaction with irradiating laser light and forming an anisotropic structure inside the PMMA/DO11 thin film.

Keywords

EN

33.55.+b; 78.20.-e; 78.66.Qn

Discipline

• 78.66.Qn: Polymers; organic compounds
• 78.20.-e: Optical properties of bulk materials and thin films(for optical properties related to materials treatment, see 81.40.Tv; for optical materials, see 42.70-a; for optical properties of superconductors, see 74.25.Gz; for optical properties of rocks and minerals, see 91.60.Mk; for optical properties of specific thin films, see 78.66.-w)
• 33.55.+b: Optical activity and dichroism

• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 5
• Pages: 857-863

Dates

published

2009-05

received

2008-11-18

(unknown)

2009-04-21

Contributors

author

B. Abbas

• Atomic Energy Commission, P.O. Box 6091, Damascus, Syria

author

M. Alshikh Khalil

• Atomic Energy Commission, P.O. Box 6091, Damascus, Syria

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Identifiers

DOI

10.12693/APhysPolA.115.857