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Chemical Imaging Analysis of the Micropatterns of Proteins and Cells Using Cluster Ion Beam-based Time-of-Flight Secondary Ion Mass Spectrometry and Principal Component Analysis
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  • Chemical Imaging Analysis of the Micropatterns of Proteins and Cells Using Cluster Ion Beam-based Time-of-Flight Secondary Ion Mass Spectrometry and Principal Component Analysis
  • Chemical Imaging Analysis of the Micropatterns of Proteins and Cells Using Cluster Ion Beam-based Time-of-Flight Secondary Ion Mass Spectrometry and Principal Component Analysis
저자명
Shon. Hyun Kyong,Son. Jin Gyeong,Lee. Kyung-Bok,Kim. Jinmo,Kim. Myung Soo,Choi. Insung S.,Lee. Tae Geol
간행물명
Bulletin of the Korean Chemical Society
권/호정보
2013년|34권 3호|pp.815-819 (5 pages)
발행정보
대한화학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Micropatterns of streptavidin and human epidermal carcinoma A431 cells were successfully imaged, as received and without any labeling, using cluster $Au_3{^+}$ ion beam-based time-of-flight secondary ion mass spectrometry (TOF-SIMS) together with a principal component analysis (PCA). Three different analysis ion beams ($Ga^+$, $Au^+$ and $Au_3{^+}$) were compared to obtain label-free TOF-SIMS chemical images of micropatterns of streptavidin, which were subsequently used for generating cell patterns. The image of the total positive ions obtained by the $Au_3{^+}$ primary ion beam corresponded to the actual image of micropatterns of streptavidin, whereas the total positive-ion images by $Ga^+$ or $Au^+$ primary ion beams did not. A PCA of the TOF-SIMS spectra was initially performed to identify characteristic secondary ions of streptavidin. Chemical images of each characteristic ion were reconstructed from the raw data and used in the second PCA run, which resulted in a contrasted - and corrected - image of the micropatterns of streptavidin by the $Ga^+$ and $Au^+$ ion beams. The findings herein suggest that using cluster-ion analysis beams and multivariate data analysis for TOF-SIMS chemical imaging would be an effectual method for producing label-free chemical images of micropatterns of biomolecules, including proteins and cells.