Photoluminescence in polyamide/mica and polyethylene/ MgO nanocomposites induced by ultraviolet photons

• Published in: IEEE transactions on dielectrics and electrical insulation Vol. 15; no. 5; pp. 1215 - 1223
• Main Authors: Fuse, N., Okada, M., Ohki, Y., Murata, Y., Sekiguchi, Y., Tanaka, T.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.10.2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Automotive materials; Bands; Electromagnetic wave absorption; electronic localized states; Energy states; Fuses; low-density polyethylene; Luminescence; Nanocomposites; Nanomaterials; Nanostructure; Optical polymers; Optical sensors; Photoluminescence; Photons; polyamide; Polyamide resins; Polyethylene; Polyethylenes; Polymer nanocomposites; Spectrum analysis
• ISSN: 1070-9878; 1558-4135
• DOI: 10.1109/TDEI.2008.4656228

Nature of electronic states in the energy band is investigated by means of optical absorption and photoluminescence induced by vacuum ultraviolet photons for polyamide-6/mica and low-density polyethylene/MgO nanocomposites. The nanofiller loading does not affect the absorption spectra of polyamide samples. Contrary to this, two absorption bands are induced at around 5.0 and 6.2 eV by the nanofiller loading in polyethylene samples, but they are due to absorption by the fillers. A luminescence band is observed at around 3.0 eV in polyamide samples, whereas three luminescence bands are observed at around 4.3, 3.7, and 2.9 eV in polyethylene samples. However, for all the luminescence bands, neither emission nor excitation energies change by the addition of nanofillers. Decay profiles of all the luminescence bands are essentially unchanged by the nanofiller loading. Moreover, no new PL bands are induced in the observed wavelength range. These results indicate that localized states, at least as far as the ones that can emit luminescence photons with intensities more than the sensitivity of the present research, are not induced by the nanofiller loading.