Abstract
GaP nanoparticles have been prepared using white P and a mild aqueous synthesis at decreased temperature followed by ultrasonication and stored as the suspension in water–ethanol mixture. They were characterized by standard methods of X-ray diffraction, transmission electron microscopy, Raman light scattering, and photoluminescence. Properties of GaP nanoparticles were compared with industrial and specially grown perfect GaP single crystals. It was shown that the GaP nanoparticles in suspension are the most suitable for high quality GaP/polymers nanocomposites because only they are uniform with dimensions of about 10 nm which is optimal for appearance of the pronounced quantum confinement effect. Polyglycidyl methacrylate (PGMA), polyglycidyl methacrylate-co-polyoligoethyleneglycol methacrylate (PGMA-co-POEGMA), and biphenyl vinyl ether (BPVE) polymers were used to prepare GaP polymer nanocomposites. The thickness of the polymer nanocomposite film was about 250–300 nm defined from AFM scratch experiment. The resulting nanocomposites yielded a bright luminescence at room temperature in a broad band with the maximum ranging from 2.5 to 3.2 eV and showed pronounced quantum confinement effects and other interesting and important for application phenomena leading to dramatic 1 eV expansion of GaP luminescence to the UV spectral region.
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Acknowledgments
The authors are very grateful to the US Department of State, Institute of International Exchange, Washington, DC, the US Air Force Office of Scientific Research, Science & Technology Center in Ukraine (STCU), Clemson University, SC, Istituto di elettronica dello stato solido, CNR, Rome, Italy, Universita degli studi, Cagliari, Italy, Joffe Physico-Technical Institute, St. Petersburg State Technical University, Russia and Academy of Sciences of Moldova for support and attention to our extended (1963–2009) research efforts. Our special gratitude to Dr. E. Rusu and Dr. N. Tsyntsaru from Institute of Electronic Engineering and Industrial Technologies, Dr. A. Siminel, post graduate students S. Bilevschii. A. Gavriluta and A. Racu from Institute of Applied Physics, Moldova, Dr. D. Van DerVeer, Clemson University, for their contribution in elaboration of GaP nanotechnology, characterization of nanoparticles and nanocomposites.
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Pyshkin, S.L., Ballato, J., Luzinov, I. et al. Fabrication and characterization of GaP/polymer nanocomposites for advanced light emissive device structures. J Nanopart Res 13, 5565–5570 (2011). https://doi.org/10.1007/s11051-011-0547-0
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DOI: https://doi.org/10.1007/s11051-011-0547-0