Morphology and photophysical properties of polymer thin films dispersed with dye nanoparticle

• Published in: Thin solid films 2008-03, Vol.516 (9), p.2615-2619
• Main Authors: Machida, Shinjiro, Wakamatsu, Takeshi, Masuo, Sadahiro, Jinnai, Hiroshi, Itaya, Akira
• Format: Article
• Language: English
• Subjects: Applied sciences; Composite materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Dye nanoparticle; Exact sciences and technology; Forms of application and semi-finished materials; Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids); Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Miscellaneous; Morphology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of specific thin films; Photophysical properties; Physics; Polymer industry, paints, wood; Polymer thin film; Polymers; organic compounds; Technology of polymers
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2007.04.133

We prepared nanoparticles of an organic dye, acridine orange (AO), dispersed in poly(methacrylic acid) (PMA) films by spin-coating the solution of the two components. The surface of the AO/PMA films became bumpier with increasing AO concentration ( c AO). The absorption and fluorescence spectra of AO/PMA films exhibited a marked dependence on c AO at low c AO ( c AO < 2.1 × 10 − 1  mol kg − 1 ), and were independent of c AO at high c AO ( c AO > 2.1 × 10 − 1  mol kg − 1 ). The peak shift of fluorescence spectra with changing c AO was as large as ∼ 100 nm.