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Abstract:

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.

Registro:

Documento: Artículo
Título:Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses
Autor:Von Bilderling, C.; Tagliazucchi, M.; Calvo, E.J.; Bragas, A.V.
Filiación:Laboratorio de Electrónica Cuántica, Departamento de Física, FCEN, UBA, Argentina
INQUIMAE, Departamento de Química Inorgánica Analítica y Química Física, FCEN, UBA, Argentina
CONICET, Argentina
Palabras clave: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
Año:2009
Volumen:17
Número:13
Página de inicio:10642
Página de fin:10647
DOI: http://dx.doi.org/10.1364/OE.17.010642
Título revista:Optics Express
Título revista abreviado:Opt. Express
ISSN:10944087
CAS:titanium, 7440-32-6; Electrolytes; Ions; Membranes, Artificial; Polyamines; Polymers; Titanium, 7440-32-6; polyallylamine, 30551-89-4
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10944087_v17_n13_p10642_VonBilderling

Referencias:

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Citas:

---------- APA ----------
Von Bilderling, C., Tagliazucchi, M., Calvo, E.J. & Bragas, A.V. (2009) . Molecular orientation in self-assembled multilayers measured by Second Harmonic generation using femtosecond pulses. Optics Express, 17(13), 10642-10647.
http://dx.doi.org/10.1364/OE.17.010642
---------- CHICAGO ----------
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" . Optics Express 17, no. 13 (2009) : 10642-10647.
http://dx.doi.org/10.1364/OE.17.010642
---------- MLA ----------
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" . Optics Express, vol. 17, no. 13, 2009, pp. 10642-10647.
http://dx.doi.org/10.1364/OE.17.010642
---------- VANCOUVER ----------
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. Opt. Express. 2009;17(13):10642-10647.
http://dx.doi.org/10.1364/OE.17.010642