Analysis of wavelength effect on birefringence creation on PAH/PAZO layer-by-layer films

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The influence of wavelength of writing laser beam in the photoinduced birefringence dynamics on layer-by-layer (LBL) films of poly(allylamine hydrochloride) (PAH) and poly{1-(4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido)-1,2-ethanediyl, sodium salt} (PAZO) was investigated. Results revealed that the increase of laser wavelength lead to a slower birefringence build up process, whereas the relaxation process stands approximately unchanged. The buildup celerity was shown to follow the film absorbance with wavelength. The imposition of excess energy density to the PAH/PAZO LBL film was also shown to induce morphological changes in the film surface,which are also wavelength dependent.

Original languageEnglish
Title of host publicationPHOTOPTICS 2019 - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology
EditorsPaulo Ribeiro, Maria Raposo, David Andrews
PublisherSciTePress
Pages325-328
Number of pages4
ISBN (Electronic)9789897583643
Publication statusPublished - 1 Jan 2019
Event7th International Conference on Photonics, Optics and Laser Technology, PHOTOPTICS 2019 - Prague, Czech Republic
Duration: 25 Feb 201927 Feb 2019

Conference

Conference7th International Conference on Photonics, Optics and Laser Technology, PHOTOPTICS 2019
CountryCzech Republic
CityPrague
Period25/02/1927/02/19

Fingerprint

polycyclic aromatic hydrocarbons
birefringence
wavelengths
hydrochlorides
flux density
sodium
laser beams
salts
lasers

Keywords

  • Birefringence
  • Layer-layer Films
  • PAZO
  • Wavelength

Cite this

Raposo, M., Timóteo, A. R. M., & Ribeiro, P. A. (2019). Analysis of wavelength effect on birefringence creation on PAH/PAZO layer-by-layer films. In P. Ribeiro, M. Raposo, & D. Andrews (Eds.), PHOTOPTICS 2019 - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology (pp. 325-328). SciTePress.
Raposo, Maria ; Timóteo, Ana Rita Monteiro ; Ribeiro, Paulo António. / Analysis of wavelength effect on birefringence creation on PAH/PAZO layer-by-layer films. PHOTOPTICS 2019 - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology. editor / Paulo Ribeiro ; Maria Raposo ; David Andrews. SciTePress, 2019. pp. 325-328
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abstract = "The influence of wavelength of writing laser beam in the photoinduced birefringence dynamics on layer-by-layer (LBL) films of poly(allylamine hydrochloride) (PAH) and poly{1-(4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido)-1,2-ethanediyl, sodium salt} (PAZO) was investigated. Results revealed that the increase of laser wavelength lead to a slower birefringence build up process, whereas the relaxation process stands approximately unchanged. The buildup celerity was shown to follow the film absorbance with wavelength. The imposition of excess energy density to the PAH/PAZO LBL film was also shown to induce morphological changes in the film surface,which are also wavelength dependent.",
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Raposo, M, Timóteo, ARM & Ribeiro, PA 2019, Analysis of wavelength effect on birefringence creation on PAH/PAZO layer-by-layer films. in P Ribeiro, M Raposo & D Andrews (eds), PHOTOPTICS 2019 - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology. SciTePress, pp. 325-328, 7th International Conference on Photonics, Optics and Laser Technology, PHOTOPTICS 2019, Prague, Czech Republic, 25/02/19.

Analysis of wavelength effect on birefringence creation on PAH/PAZO layer-by-layer films. / Raposo, Maria; Timóteo, Ana Rita Monteiro; Ribeiro, Paulo António.

PHOTOPTICS 2019 - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology. ed. / Paulo Ribeiro; Maria Raposo; David Andrews. SciTePress, 2019. p. 325-328.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Analysis of wavelength effect on birefringence creation on PAH/PAZO layer-by-layer films

AU - Raposo, Maria

AU - Timóteo, Ana Rita Monteiro

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AB - The influence of wavelength of writing laser beam in the photoinduced birefringence dynamics on layer-by-layer (LBL) films of poly(allylamine hydrochloride) (PAH) and poly{1-(4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido)-1,2-ethanediyl, sodium salt} (PAZO) was investigated. Results revealed that the increase of laser wavelength lead to a slower birefringence build up process, whereas the relaxation process stands approximately unchanged. The buildup celerity was shown to follow the film absorbance with wavelength. The imposition of excess energy density to the PAH/PAZO LBL film was also shown to induce morphological changes in the film surface,which are also wavelength dependent.

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Raposo M, Timóteo ARM, Ribeiro PA. Analysis of wavelength effect on birefringence creation on PAH/PAZO layer-by-layer films. In Ribeiro P, Raposo M, Andrews D, editors, PHOTOPTICS 2019 - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology. SciTePress. 2019. p. 325-328