Coating zinc oxide submicron crystals on poly(methyl methacrylate) chips and spheres via ultrasound irradiation

Kotlyar Anna, Perkas Nina, Koltypin Yuri, Meyer Meinhard, Zimmermann Werner, Gedanken Aharon

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Ultrasound irradiation is used for anchoring zinc oxide submicron crystals with a main diameter and length of ∼280 nm and 470 nm, respectively, onto the surface of poly(methyl methacrylate) PMMA chips (2 mm diameter), and zinc oxide crystals with a mean diameter and length of ∼150 nm and 230 nm, respectively, onto the surface of the PMMA spheres (1-10 μm). The zinc oxide crystals were obtained by sonochemical irradiation of a mixture containing the PMMA, zinc (II) acetate dihydrate, ethanol, water, and 24 wt.% aqueous ammonia for 2 h, yielding a PMMA-zinc oxide composite. By controlling the atmosphere and reaction conditions, we could achieve well-adhered zinc oxide crystals on the surface of poly(methyl methacrylate). The resulting zinc oxide-PMMA composite was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray analysis (EDX), high-resolution scanning electron microscopy (HRSEM), and photoluminescence (PL) spectroscopy. The zinc oxide-deposited PMMA chips (loaded with 0.03-1.0 wt.% ZnO) were successfully homogenized in melt by extrusion and then injection molded into small, disc-shaped samples. These samples were analyzed with respect to their directional spectral optical properties in UV, Vis and IR spectroscopy.

Original languageEnglish
Pages (from-to)839-845
Number of pages7
JournalUltrasonics Sonochemistry
Volume15
Issue number5
DOIs
StatePublished - Jul 2008

Bibliographical note

Funding Information:
The authors thank Dr. Y. Grinblat and Dr. T. Tamari for helping with the characterization measurements. Thanks to Professor Giesa, University of Bayreuth, for homogenizing and preparing injection molded PMMA discs. The work in this paper was conducted within the framework of the Integrated Project NAPOLYDE, funded by the EUROPEAN Commission, Contract No.: NMP2-CT-2005-515846.

Keywords

  • Homogeneous deposition
  • Nanocrystals
  • Ultrasound irradiation
  • Zinc oxide

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