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아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다


아 래


제목: 나노구조 산화물 재료의 기능성-용매화전자에서 전자화합물까지...


연사: 김   성   웅  교수님 (성균관대학교 에너지과학과)


일시: 2012년 5월 23(수) 오후4:30


장소: 제1과학관 31214  e+첨단강의실



  This talk will cover the functionalities of nanostructured oxide materials composed of ubiquitous elements, specially the electro-active functionalities of both natural and artificial nanostructured oxide. It is well-known in the college textbook that the abundant light-metal oxides such as SiO2, Al2O3 and CaO are typical insulators exhibiting no electro-active functionalities. However, this common sense should be revised to that “Nanostructured light-metal oxides show the electrical conduction from semiconducting to metallic and finally to superconductivity.” This phenomenon is based on the interstitial electrons in a structural space with the size of nanoscale, which have a long history over 2 century, from the birth of solvated electrons discovered in 1806 to the recent discovery of electride materials.

Electrides, ionic compounds with electrons working as anions, are regarded as new elecro-active materials in condensed matter physics and material science. Electrides have been studied extensively owing to exotic electronic structures, relevant unique chemical and physical properties based on interstitial electrons. A discovery of new electride in light-metal oxide, 12CaO×7Al2O3 (C12A7) with a high stability under ambient condition, facilitates and widens the electride researches for scientific and practical applications, and changes the above-mentioned common sense in science. In this talk, a history from the birth solvated electrons discovered in 1806 to a recent achievement of our C12A7 will be introduced. Further, as a promising candidate of energy-related materials, the physical and chemical properties of electrides, being utilized as a new electron source material, will be discussed. Additionally, the artificial nanostructure between insulating oxides having a high potential as a new electronics and an energy material will be introduced.


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