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http://dx.doi.org/10.5757/JKVS.2013.22.6.298

Ultrasound-Aided Monolayer Assembly of Spherical Silica Nanobeads  

Yoon, Sang-Hee (Department of Chemistry, Sookmyung Women's University)
Yoon, Seo Young (Department of Chemistry, Sookmyung Women's University)
Lee, Jin Seok (Department of Chemistry, Sookmyung Women's University)
Publication Information
Journal of the Korean Vacuum Society / v.22, no.6, 2013 , pp. 298-305 More about this Journal
Abstract
Uniform silica nanobeads were synthesized by St$\ddot{o}$ber method and assembled in the form of monolayer on glass substrate using sonication method. Before the assembly of silica nanobeads, glass substrates were treated with molecular linkers, such as CP-TMS and PEI, and nanobeads were dispersed in toluene. In attachment test, SO (sonication without stacking) method and SS (sonnication with stacking) method was used and sonication time was controled. After the experiment, microbalance was use to measure deviation between before and after the attachment experiment then calculate percent of coverage. Minutely observe with SEM (Scanning Electron Microscopy) then select the most close-packed and monolayer assembled cover glass and calculate DOC (Degree of Coverage). In SO method, DOC increased very sharply and reach over 140 percent point, also got lots of multi-layer region. On the other hand, in SS method DOC increased slower than SO method but more close-packed and monolayer assembled.
Keywords
Ultrasound; Silica nanobead; Monolayer assembly; Degree of coverage;
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