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Materials 2014, 7(1), 471-483; doi:10.3390/ma7010471
Article

Luminescent Properties of Surface Functionalized BaTiO3 Embedded in Poly(methyl methacrylate)

* ,
 and
Department of Physics and Astronomy, Texas Christian University, TCU Box 298840, Fort Worth, TX 76129, USA
* Author to whom correspondence should be addressed.
Received: 1 December 2013 / Revised: 19 December 2013 / Accepted: 8 January 2014 / Published: 16 January 2014
(This article belongs to the Special Issue Nanocomposites of Polymers and Inorganic Particles 2013)
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Abstract

As-received BaTiO3 nanopowders of average grain sizes 50 nm and 100 nm were functionalized by (3-aminopropyl)triethoxysilane (APTES) and mixed with poly(methyl methacrylate)/toluene solution. The nanocomposite solution was spin coated on Si substrates to form thin films. The photoluminescence spectrum of the pure powder was composed of a bandgap emission at 3.0 eV and multiple bands centered about 2.5 eV. Surface functionalization of the BaTiO3 powder via APTES increases overall luminescence at room temperature while only enhancing bandgap emission at low-temperature. Polymer coating of the functionalized nanoparticles significantly enhances bandgap emissions while decreasing emissions associated with near-surface lattice distortions at 2.5 eV.
Keywords: BaTiO3; BTO; polymethyl methacrylate; PMMA; photoluminescence; inorganic-organic nanocomposite BaTiO3; BTO; polymethyl methacrylate; PMMA; photoluminescence; inorganic-organic nanocomposite
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Requena, S.; Lacoul, S.; Strzhemechny, Y.M. Luminescent Properties of Surface Functionalized BaTiO3 Embedded in Poly(methyl methacrylate). Materials 2014, 7, 471-483.

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