DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kwak, Ju-Hyoun | - |
dc.contributor.advisor | 곽주현 | - |
dc.contributor.author | Yang, Hae-Sik | - |
dc.contributor.author | 양해식 | - |
dc.date.accessioned | 2011-12-13T04:27:30Z | - |
dc.date.available | 2011-12-13T04:27:30Z | - |
dc.date.issued | 1997 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=128465&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/31466 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 화학과, 1997.8, [ vi, 151 p. ] | - |
dc.description.abstract | Water transport during cation and anion transport in polypyrrole(PPy) and poly(N-methylpyrrole) (PMPy) films has been investigated by employing the electrochemical quartz crystal microbalance (EQCM) technique, the electrochemical impedance technique, and the electrogravimetric impedance technique. The number of accompanying waters per cation in poly(pyrrole/ copper phthalocyaninetetrasulfonate) (PPy/CuPTS) films, where cation transport prevails, increases with the hydration number of cation in an electrolyte solution ; it increases with the sequence of $Cs^+<K^+<Na^+<Li^+<Mg^{2+}$. The number of accompanying waters per cation exhibits hysteresis behavior during the redox cycle; it increases during the insertion of a cation whereas it is uniform during the exclusion of a cation. The number of accompanying waters per $Cl^-$ or $SO_4^{2-}$ in poly(N-methylpyrrole/chloride) (PMPy/Cl) and poly(N-methylpyrrole/sulfate) (PMPy/$SO_4$) films, where ion transport is anion-specific, is considerable, whereas the number per $NO_3^-$ in poly(N-methylpyrrole/nitrate) (PMPy/$NO_3$) films is not large. The ionic conductivity of a divalent cation and anion is much smaller than that of a monovalent cation and anion, respectively, because of the strong ion-ion interaction in a film. The contribution of cation and anion to ion transport in polypyrrole/poly(styrenesulfonate) (PPy/PSS) and polypyrrole/nitrate (PPy/$NO_3$) films has also been obtained to investigate frequency- dependent ion transport mode. In the PPy/PSS film, cation transport is dominant during the fast faradaic process whereas anion transport is dominant during the slow one. On the contrary, in the PPy/$NO_3$ film, anion transport is dominant during the fast faradaic process whereas cation transport is considerable during the slow one. Finally, the electromechanical impedance technique has been employed to verify the relation between mass and resonant frequency. The morphology change of a PPy film does not affect ... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | electrogravimetric impedance technique | - |
dc.subject | electrochemical impedance technique | - |
dc.subject | EQCM | - |
dc.subject | polypyrrole | - |
dc.subject | ion transport | - |
dc.subject | 이온 이동 | - |
dc.subject | 전자무게 임피던스법 | - |
dc.subject | 전기화학적 임피던스법 | - |
dc.subject | 전기화학적 수정 미세 저울 | - |
dc.subject | 폴리피롤 | - |
dc.title | Study on Ion and solvent transport mechanism for polypyrrole films using the impedance techniques | - |
dc.title.alternative | 임피던스법을 이용한 폴리피롤에 대한 이온과 용매의 이동 메커니즘에 관한 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 128465/325007 | - |
dc.description.department | 한국과학기술원 : 화학과, | - |
dc.identifier.uid | 000945239 | - |
dc.contributor.localauthor | Kwak, Ju-Hyoun | - |
dc.contributor.localauthor | 곽주현 | - |
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