DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Yuk, Jong Min | - |
dc.contributor.advisor | 육종민 | - |
dc.contributor.author | Kim, Jaesung | - |
dc.date.accessioned | 2022-04-21T19:32:08Z | - |
dc.date.available | 2022-04-21T19:32:08Z | - |
dc.date.issued | 2021 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=963499&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/295456 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 신소재공학과, 2021.8,[iv, 42 p. :] | - |
dc.description.abstract | Calcium Carbonate (CaCO$_3$) has been studied for industrial and medical usage. For increasing efficiency, the enlargement of the surface area has been challenged. In previous studies, concentration, pressure, temperature, and additive addition have all been considered as the main parameter to manipulate the shape of CaCO$_3$. For direct observation of the effect of these parameters, liquid phase Transmission Electron Microscopy (LP-TEM) has been efficiently utilized. However, the initial phase of CaCO$_3$, Amorphous Calcium Carbonate (ACC) has not yet discovered all the mysteries like the hollowing mechanism of ACC. Here, by utilizing LP-TEM, the crystallization process of CaCO$_3$ in high pH (9.75) conditions is observed. Furthermore, based on the analysis of the Selected Area Electron Diffraction (SAED) pattern and Electron Energy Loss Spectroscopy (EELS) data, the initial phase is determined to ACC-H2O and ACC. In conclusion, dehydration and solid-state phase transformation at the surface of ACC-H2O construct the ACC shell around the particle. And then, sequential process of dissolution / (re)precipitation of ACC-H2O fabricate hollow shape of ACC. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | In-situ transmission electron microscopy▼aCrystallization of calcium carbonate▼aAmorphous calcium carbonate▼aSelected area electron diffraction pattern▼aElectron energy loss spectroscopy | - |
dc.subject | 실시간 투과 전자현미경▼a탄산 칼슘의 결정화▼a비정질 탄산 칼슘▼a선택 영역 전자 회절 패턴▼a전자 에너지 손실 스펙트럼 | - |
dc.title | In-situ transmission electron microscopy of calcium carbonate formation | - |
dc.title.alternative | 탄산 칼슘 형성에 대한 실시간 투과전자현미경 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :신소재공학과, | - |
dc.contributor.alternativeauthor | 김재성 | - |
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