DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Mahn-Won | - |
dc.contributor.advisor | 김만원 | - |
dc.contributor.author | Kim, Sang-Hyun | - |
dc.contributor.author | 김상현 | - |
dc.date.accessioned | 2011-12-14T07:25:27Z | - |
dc.date.available | 2011-12-14T07:25:27Z | - |
dc.date.issued | 2009 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=309017&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/47440 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 물리학과, 2009.2, [ x, 78 p. ] | - |
dc.description.abstract | Amphiphilic molecules spontaneously self-organize into various structures in the aqueous solution above a certain concentration with their hydrophobic ``tail`` parts pointed inward and their hydrophilic ``head`` parts pointed outward, by hydrophobic effect. While the hydrophobic interaction leads to the self-assembly of surfactants, the equilibrium geometry of an assembled structure is affected by the various factors such as a steric molecular shape, concentration and the electrostatic interaction. Among the self-assembled systems of surfactants, the cylindrical micellar system shows various interesting phenomena such as a micellar length growth, branch formation and the micelle-to-lamellar transition depending on the thermodynamic conditions. In this study, we observed the overall properties of the cylindrical micellar solutions and showed that these properties can be controlled by adding a small amount of other amphiphilic molecules. Also, we considered and discussed about a correlation between changes of these properties and the possibility for the curvature energy argument to describe the surfactant self assemble system with an aggregate level not a monomer molecular level. For these, we have measured the micellar size, the cloud temperature and the micelle-to-lamellar transition temperature when a small amount of other amphiphilic molecule was mixed to the neutral cylindrical micellar solution (penta-ethyleneglycol mono n-dodecyl ether; $C_{12}E_5$). The mixed surfactants were a cationic (Dodecyl trimethyl ammonium bromide; DTAB) and a neutral (1-Tridecanoyl-2-Hydroxy-sn-Glycero-3-Phosphocholine; LysoPC) spherical micelle-forming surfactant, and a bilayer-forming neutral lipid (DL- $\alpha$ -phosphatidylcholine dimyristol; DMPC). At first we observed an unusual length shortening of a nonionic/ionic mixed cylindrical micelle as the concentration($\sl{C}$) increases quantitatively by using SANS experiments. For this behavior occured in the nonionic surf... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Self assembly | - |
dc.subject | surfactant | - |
dc.subject | micelle | - |
dc.subject | SANS | - |
dc.subject | 자기조립 | - |
dc.subject | 계면활성제 | - |
dc.subject | 마이셀 | - |
dc.subject | 소각중성자산란 | - |
dc.title | Study on the property of cylindrical micellar solutions with observation of the additional amphiphilic molecules effects | - |
dc.title.alternative | 첨가된 양친성 분자의 영향 관찰을 통한 실린더형 마이셀 용액의 특성 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 309017/325007 | - |
dc.description.department | 한국과학기술원 : 물리학과, | - |
dc.identifier.uid | 020035040 | - |
dc.contributor.localauthor | Kim, Sang-Hyun | - |
dc.contributor.localauthor | 김상현 | - |
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