Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Application of Electron Energy Loss Spectroscopy - Spectrum Imaging (EELS-SI) for Microbe-mineral Interaction

생지구화학적 광물변이작용 연구에서 전자에너지 손실 분광 분석 - 스펙트럼 영상법의 활용

  • Yang, Kiho (Department of Earth System Sciences, Yonsei University) ;
  • Park, Hanbeom (Department of Earth System Sciences, Yonsei University) ;
  • Kim, Jinwook (Department of Earth System Sciences, Yonsei University)
  • 양기호 (연세대학교 지구시스템과학과) ;
  • 박한범 (연세대학교 지구시스템과학과) ;
  • 김진욱 (연세대학교 지구시스템과학과)
  • Received : 2019.01.16
  • Accepted : 2019.03.07
  • Published : 2019.03.31
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Abstract

The oxidation states of structural Fe in minerals reflect the paleo-depositional redox conditions for the biologically or abiotically induced mineral formation. Particularly, nano-scale analysis using high-resolution transmission electron microscopy (HRTEM) and electron energy loss spectroscopy (EELS) is necessary to identify evidence for the microbial role in the biomineralization. HRTEM-EELS analysis of oxidation states of structural Fe and carbon bonding structure differentiate biological factors in mineralization by mapping the distribution of Fe(II)/Fe(III) and source of organic C. HRTEM-EELS technique provides geomicrobiologists with the direct nano-scale evidence of microbe-mineral interaction.

광물 구조에 분포하는 철의 산화수 정보는 유 무기적 퇴적광물형성 시 산화환원 조건 등 과거 퇴적 환경에 대한 정보를 제공한다. 특히, 생광물화작용에서 미생물의 역할을 규명하기 위해서는 고분해능 투과 전자현미경(HRTEM) 및 전자에너지 손실 분광기(EELS)를 활용한 나노스케일 분석이 필요하다. HRTEM-EELS를 이용한 광물구조 내 철의 산화수 및 탄소 결합 구조 분석, Fe(II)/Fe(III) 및 탄소 기원 분포영상으로부터 광물생성의 생물학적 요소를 판별할 수 있다. 이와 같은 나노스케일 분석을 통하여 지질미생물학자들은 미생물-광물작용의 증거를 직접적으로 얻을 수 있다.

Keywords

References

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