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Synthesis of ZnO/SiO2 nanocomposites emitting specific luminescence colors
Abdullah M.a,c, Shibamoto S.b, Okuyama K.a
a Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Japan
b Hiroshima Joint Research Center, Nanotechnology Particle Project, Japan Chemical Innovation Institute, Japan
c Department of Physics, Bandung Institute of Technology, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]Composites of zinc oxide (ZnO) nanoparticles in silica matrix can be produced by initially synthesizing a ZnO colloid (containing ZnO nanoparticles in ethanol solution), mixed with tetraethoxysilane (TEOS), followed by spray drying, to produce powder comprised of submicrometer sized particles. The initial size of ZnO nanoparticles in the colloid is about 3 nm when the precursors are first mixed, but the size increases with aging, following an approximate equation D∝tα, α=constant [J. Phys. Chem. B 102 (1998) 2854]. By using ZnO colloids that have been aged for different times, composites containing a specific size of ZnO can be produced. Since the excitation and emission luminescence spectral positions of ZnO are dependent on particle size (shift to blue region with reducing particle size), composites that emit a specific color can be produced using this method. We have been able to produce composites that emit colors from blue (460 nm) up to yellow-green (550 nm). © 2004 Elsevier B.V. All rights reserved.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Band gaps,Droplet size,Emission spectra,Spray drying method[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowship for M.A. is gratefully acknowledged. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO)’s Nanotechnology Materials Program––Nanotechnology Particle Project based on fund provided by the Ministry of Economy, Trade, and Industry (METI), Japan. We thank Keisuke Kondo and Takanori Nakayu for assistantship and Dr. I. Wuled Lenggoro (Hiroshima University) for valuable discussions.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.optmat.2004.01.006[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]