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Single and multiple-step dip-coating of colloidal maghemite (γ-Fe2O3) nanoparticles onto Si, Si 3N4, and SiO2 substrates

Cited 43 time in Web of Science Cited 41 time in Scopus
Issue Date
2004-11
Citation
Advanced Functional Materials, Vol.14 No.11, pp.1062-1068
Abstract
The adsorption behavior of colloidal maghemite (gamma-Fe2O3) nanoparticles, passivated by oleic acid and dispersed in octane solution, onto three different substrates (Si, Si3N4, and SiO2) is investigated. The average nanoparticle size is 10 nm, with a size variation (sigma) less than 5%. The adsorption of particles is strongly dependent on both the type of substrate and the particle concentration in solution. By a single-dipping process, we have obtained a maximum coverage of 0.45 on a Si substrate but much less on other substrates (0.19 on Si3N4 and 0.14 on SiO2). The particle coverage was drastically increased by the multiple-adsorption process, where the process of dipping and drying was repeated multiple times. With this process, we can obtain a maximum particle coverage of about 0.75 on a Si substrate and 0.61 on a thermally grown SiO2 substrate.
ISSN
1616-301X
URI
https://hdl.handle.net/10371/166025
DOI
https://doi.org/10.1002/adfm.200305088
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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