Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses

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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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Autores principales:	von Bilderling, Catalina, Tagliazucchi, Mario Eugenio, Calvo, Ernesto Julio, Bragas, Andrea Verónica
Publicado:	2009
Materias:	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
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10944087_v17_n13_p10642_VonBilderling http://hdl.handle.net/20.500.12110/paper_10944087_v17_n13_p10642_VonBilderling
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10944087_v17_n13_p10642_VonBilderling
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spelling	paper:paper_10944087_v17_n13_p10642_VonBilderling2023-06-08T16:06:51Z Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses von Bilderling, Catalina Tagliazucchi, Mario Eugenio Calvo, Ernesto Julio Bragas, Andrea Verónica 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. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10944087_v17_n13_p10642_VonBilderling 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, Catalina Tagliazucchi, Mario Eugenio Calvo, Ernesto Julio Bragas, Andrea Verónica 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.
author	von Bilderling, Catalina Tagliazucchi, Mario Eugenio Calvo, Ernesto Julio Bragas, Andrea Verónica
author_facet	von Bilderling, Catalina Tagliazucchi, Mario Eugenio Calvo, Ernesto Julio Bragas, Andrea Verónica
author_sort	von Bilderling, Catalina
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
publishDate	2009
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10944087_v17_n13_p10642_VonBilderling http://hdl.handle.net/20.500.12110/paper_10944087_v17_n13_p10642_VonBilderling
work_keys_str_mv	AT vonbilderlingcatalina molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses AT tagliazucchimarioeugenio molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses AT calvoernestojulio molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses AT bragasandreaveronica molecularorientationinselfassembledmultilayersmeasuredbysecondharmonicgenerationusingfemtosecondpulses
_version_	1768543047562297344

Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses

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