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Highly ordered porous monolayer generation by dual-speed spin-coating with colloidal templates
Nandiyanto A.B.D.a, Ogi T.a, Iskandar F.b, Okuyama K.a
a Department of Chemical Engineering, Hiroshima University, Japan
b Department of Physics, Institut Teknologi Bandung, 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]An ordered porous monolayer was successfully prepared using a dual-speed spin-coating with colloidal templates. The facile and rapid production was effective when a combination of 5-nm silica (as a model of an inorganic nanoparticle) and 410-nm polystyrene (PS) spheres (as a model of the template) were spin-coated to produce a composite silica/PS film. Heat treatment was then used to remove the PS, producing the porous film. The porous monolayer with a highly ordered porous structure could be obtained, which would not be realized using the current spin-coating methods that utilize single-spinning speed technique. The pore size and shape (spherical) were identical to the initial template, giving a potential way for further developments (e.g. control of pore size). The theoretical explanation and mechanism of porous formation were also added, which would be important for the scaling-up prediction and estimation. Sufficient numbers of pores made it possible to produce a material with a high porosity, an ultralow density, and an ultralow refractive index because the pores allocated free space, which was confirmed by calculation. © 2010 Elsevier B.V.[/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]Low refractive index,Low-density materials,Porous structures,Silica particle,Spin-coating 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]Low-density material,Polystyrene,Porous structure film,Silica particle,Spin-coating method,Ultra-low refractive index[/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]We acknowledged the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan for providing a research grant (No. A-22246099 ) and a scholarship for A.B.D.N. Authors also thank to Tuswadi of Faculty of IDEC of Hiroshima University for the English consultation.[/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.cej.2010.11.077[/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]