Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses
We present measurements of the optical second-harmonic generation in self assembled multilayer films of PAZO/PAH polymers with the aim to investigate molecular order in the layer-by-layer architecture. The experiments are performed in transmission, using a femtosecond Ti:Sa pulsed laser, which allow...
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todo:paper_10944087_v17_n13_p10642_VonBilderling2023-10-03T16:05:08Z Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses Von Bilderling, C. Tagliazucchi, M. Calvo, E.J. Bragas, A.V. Electromagnetic pulse Harmonic analysis Harmonic generation Molecular orientation Molecules Multilayer films Nonlinear optics Optical multilayers Signal analysis Interference fringe Molecular ordering Number of layers Optical second harmonic generation Second harmonic signals Self assembled multilayers Self-assembled multilayer films Surface normals Multilayers electrolyte ion polyallylamine polyamine polymer titanium article artificial membrane chemical structure chemistry optics reproducibility surface property time Electrolytes Ions Membranes, Artificial Molecular Structure Optics and Photonics Polyamines Polymers Reproducibility of Results Surface Properties Time Factors Titanium We present measurements of the optical second-harmonic generation in self assembled multilayer films of PAZO/PAH polymers with the aim to investigate molecular order in the layer-by-layer architecture. The experiments are performed in transmission, using a femtosecond Ti:Sa pulsed laser, which allows a more accurate determination of the amplitude of the second harmonic signal, without interference fringes usually present in nanosecond experiments. We found that the first bilayer, in contact with the substrate, presents a broad distribution of the orientation of the molecules, while the addition of successive bilayers (up to 12) produces ordering of the molecules with a small tilt angle respect to the surface normal. This result, together with the monotonic increment of the second harmonic signal with the number of layers indicates that the molecules grow orderly assembled in these films. © 2009 Optical Society of America. Fil:Von Bilderling, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tagliazucchi, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calvo, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bragas, A.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10944087_v17_n13_p10642_VonBilderling |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Electromagnetic pulse Harmonic analysis Harmonic generation Molecular orientation Molecules Multilayer films Nonlinear optics Optical multilayers Signal analysis Interference fringe Molecular ordering Number of layers Optical second harmonic generation Second harmonic signals Self assembled multilayers Self-assembled multilayer films Surface normals Multilayers electrolyte ion polyallylamine polyamine polymer titanium article artificial membrane chemical structure chemistry optics reproducibility surface property time Electrolytes Ions Membranes, Artificial Molecular Structure Optics and Photonics Polyamines Polymers Reproducibility of Results Surface Properties Time Factors Titanium |
spellingShingle |
Electromagnetic pulse Harmonic analysis Harmonic generation Molecular orientation Molecules Multilayer films Nonlinear optics Optical multilayers Signal analysis Interference fringe Molecular ordering Number of layers Optical second harmonic generation Second harmonic signals Self assembled multilayers Self-assembled multilayer films Surface normals Multilayers electrolyte ion polyallylamine polyamine polymer titanium article artificial membrane chemical structure chemistry optics reproducibility surface property time Electrolytes Ions Membranes, Artificial Molecular Structure Optics and Photonics Polyamines Polymers Reproducibility of Results Surface Properties Time Factors Titanium Von Bilderling, C. Tagliazucchi, M. Calvo, E.J. Bragas, A.V. Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses |
topic_facet |
Electromagnetic pulse Harmonic analysis Harmonic generation Molecular orientation Molecules Multilayer films Nonlinear optics Optical multilayers Signal analysis Interference fringe Molecular ordering Number of layers Optical second harmonic generation Second harmonic signals Self assembled multilayers Self-assembled multilayer films Surface normals Multilayers electrolyte ion polyallylamine polyamine polymer titanium article artificial membrane chemical structure chemistry optics reproducibility surface property time Electrolytes Ions Membranes, Artificial Molecular Structure Optics and Photonics Polyamines Polymers Reproducibility of Results Surface Properties Time Factors Titanium |
description |
We present measurements of the optical second-harmonic generation in self assembled multilayer films of PAZO/PAH polymers with the aim to investigate molecular order in the layer-by-layer architecture. The experiments are performed in transmission, using a femtosecond Ti:Sa pulsed laser, which allows a more accurate determination of the amplitude of the second harmonic signal, without interference fringes usually present in nanosecond experiments. We found that the first bilayer, in contact with the substrate, presents a broad distribution of the orientation of the molecules, while the addition of successive bilayers (up to 12) produces ordering of the molecules with a small tilt angle respect to the surface normal. This result, together with the monotonic increment of the second harmonic signal with the number of layers indicates that the molecules grow orderly assembled in these films. © 2009 Optical Society of America. |
format |
JOUR |
author |
Von Bilderling, C. Tagliazucchi, M. Calvo, E.J. Bragas, A.V. |
author_facet |
Von Bilderling, C. Tagliazucchi, M. Calvo, E.J. Bragas, A.V. |
author_sort |
Von Bilderling, C. |
title |
Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses |
title_short |
Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses |
title_full |
Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses |
title_fullStr |
Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses |
title_full_unstemmed |
Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses |
title_sort |
molecular orientation in self-assembled multilayers measured by second harmonic generation using femtosecond pulses |
url |
http://hdl.handle.net/20.500.12110/paper_10944087_v17_n13_p10642_VonBilderling |
work_keys_str_mv |
AT vonbilderlingc molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses AT tagliazucchim molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses AT calvoej molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses AT bragasav molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses |
_version_ |
1782030994746900480 |