Study on synthesis of monodisperse colloidal particles and fabrication of their inverse opals for templating block copolymer균일한 콜로이드입자의 합성과 블록공중합체의 템플레이트 형성을 위한 역오팔 제조에 관한 연구

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Monodispersed colloids are one of the cornerstones of nanoscience and nanotechnology due to their well-defined dimensions and functional properties. Among colloidal materials, polymeric particles and silica particles are the most versatile ones given its ease of preparation, precursor availability and low point of zero charge (pzc) in water. The factor that makes these colloidal materials having various potential applications such as: photonic crystals, inverse opals, soft lithographic techniques, etc. is their monodispersity. Thus, so many researchers have dedicated for improving the technique to control the size and size distribution of colloidal particles. Even though various methods to synthesize monodispersed colloidal particles in a wide range of from nano-scale to micro-scale have been reported, a number of apparent drawbacks of being multistage synthesis, difficult in controlling size and monodispersity of particles or using complicated equipments for reactors are still remained. In this study, we researched on the two most common colloids in nanoscience - Polystyrene and silica colloidal particles. A simple modified dispersion polymerization of styrene which can be used to synthesize highly monodispersed polystyrene particles and to control precisely the size from 500nm up to 2000nm will be presented. The dispersion polymerization thanks to the dual function of Ammonium persulfate in initiating the polymeric radical and stabilizing PS particles. We also introduced a convenient method using anionic surfactants (Sodium p-Toluene Sulfonate (SpTS), Sodium Styrene Sulfonate (SSS), and Sodium Methacrylate (SMA)) to control the size of silica particles from 150nm up to 1000nm with high monodispersity. We also presented the fabrication of colloidal crystals and their inverse opals using polystyrene colloidal particles. A new facile fabrication of 2-D inverse opals from their 3-D colloidal crystals will be reported. The method employed the thermal expan...
Advisors
Park, O-Okresearcher박오옥researcher
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2009
Identifier
327282/325007  / 020074091
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2009. 8., [ xiv, 131 p. ]

Keywords

colloidal crystal; inverse opal; nanopattern; block copolymer; monodisperse; 콜로이드; colloidal crystal; inverse opal; nanopattern; block copolymer; monodisperse; 콜로이드

URI
http://hdl.handle.net/10203/29481
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=327282&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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