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Poly(3,4-ethylenedioxythiophene)필름의 전기화학적 합성 및 특성연구
김아미,오응주 명지대학교 자연과학연구소 2001 자연과학논문집 Vol.20 No.-
Poly(3,4-ethylenedioxythiophene) [PEDOT] 필름을 여러 다른 전해질 [tetra-n-butylammonium hexa-fluorophosphate (TBAPF6), tetra-n-butylammonium tetrafluoroborate (TBABF4), lithium perchlorate (LiClO4)]를 사용하여 전기화학적 방법으로 합성하였다. 또한 전기화학적 합성에 미치는 중합전위, 중합온도, H2O의 영향 및 고분자사슬과 전해질용액간의 상호작용을 조사하기 위하여 donor number (DN)가 다른 propylene carbonate (DN : 15.1), acetonitrile (DN : 14.1), benzonitrile (DN : 11.9), nitrobezene (DN : 4.4), nitromethant (DN : 2.7)을 전해질용매로 사용하여 PEDOT 필름을 합성하였다. PF6-를 전해질 음이온으로 사용하였을 경우의 전기전도도(141 S/cm)가 BF4-, ClO4-를 사용한 경우(49.4, 50.8 S/cm)보다 전기전도도가 높게 나타났다. 또한 용매의 donor number가 커질수록 전기전도도가 높게 나타나 PEDOT필름의 전기화학적 합성시 전기전도도는 전해질음이온과 용매의 donor number에 영향을 받는 것을 확인하였다. PEDOT [poly(3,4-ethylenedioxythiophene)] films were electrochemically synthesized using PF6-, BF4-, ClO4- as electrolyte anions. To investigate the interaction between the polymer chain and electrolyte solution, electrolyte solutions with different donor number (DN) [propylene carbonate (DN : 15.1), acetonitrile (DN : 14.1), benzonitrile (DN : 1.9), nitrobezene (DN : 4.4), nitromethane (DN : 2.7)] were used to synthesize PEDOT films and the effects of applied potential, polymerization temperature, addition of H2O to electrolyte on the characteristics of PEDOT films were studied. PEDOT film doped with PF6- electrolyte anion showed higher electrical conductivity (141 S/cm) than those doped with BF4-, ClO4- electrolyte anions (DN : 49.4, 50.8 S/cm). As the donor number of electrolyte solvent increased, the electrical conductivity of PEDOT film increased. In electrochemical synthesis of PEDOT film, it was found that the conductivity of PEDOT films depends on the electrolyte anion and the donor number (DN) of electrolyte solvents.
김아미,정현선,Rebekah Willett,임주,윤미,김광희 경인교육대학교 교육연구원 2022 교육논총 Vol.42 No.3
This article reports on a study investigating the experiences of family media practices during the pandemic. The article is based on questionnaires and semi-structured interviews with 39 parents in South Korea and the United States who have children aged between 4 and 11. The article employs a framework developed by Livingstone and Blum-Ross to consider different “genres for ‘digital parenting’” (2020: 11). The article argues that although children’s screen time increased dramatically, parents continued to mediate it and make deliberate decisions about children’s media use. In particular, the analysis reveals parents’ decisions about different purposes for children’s media use, embracing many purposes they had previously resisted. These findings indicate that parents are making more nuanced decisions than previously employed when they followed indiscriminate screen time rules.
김아미,김태정 이화여자대학교 의학회 1972 梨花醫學會誌 Vol.- No.5
An immunohistochemical study has been carried out on the prolactin cells of rat pituitary gland during pregnancy and lactation. Numerous prolactin cells were observed in lactating rats while the pregnant rats and non-lactating post partum rats showed little change. Increase of prolactin cells seems to be occured evenly throughout the anterior lobe
김아미,김태정 이화여자대학교 의과대학 1972 梨花醫學誌 Vol.- No.5
An immunohistochemical study has been carried out on the prolactin cells of rat pituitary gland during pregnancy and lactation. Numerous prolactin cells were observed in lactating rats while the pregnant rats and non-lactating post partum rats showed little change. Increase of prolactin cells seems to be occured evenly throughout the anterior lobe.