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김관표

Kim, Kwanpyo
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In-situ Observations of Pt Nanoparticle Growth at Atomic Resolution Using Graphene Liquid Cells and Cc Correction

Author(s)
Ercius, PeterYuk, Jong MinPark, JungwonKim, KwanpyoLee, J. Y.Zettl, AlexAlivisatos, A. Paul
Issued Date
2012-07-29
DOI
10.1017/S1431927612007337
URI
https://scholarworks.unist.ac.kr/handle/201301/44870
Citation
Microscopy & Microanalysis 2012, v.18, pp.1096 - 1097
Abstract
TEM aberration correctors now allow for structures to be investigated at atomic resolution with high contrast, which could greatly benefit in-situ observations of physical, chemical and biological phenomena. Recently, in-situ TEM observations of the growth of nanoparticles in liquids revealed new phenomena during the formation of colloidal inorganic particles, but the relatively thick SiN
windows and even the liquid material trapped inside degrades TEM resolution and SNR [1]. To date, no liquid cell observations of nanostructures have been achieved at atomic resolution although the growth mechanisms of such materials could greatly benefit from high-resolution characterization. Graphene sheets have been successfully used as a single-atom thick substrate for high-contrast HRTEM imaging, and its high flexibility, mechanical strength and impermeability allows the encapsulation of liquid under TEM vacuum conditions [2-3]. We introduce a new type of liquid cell using graphene sheets to entrap a colloidal growth solution for in-situ HR-TEM imaging.
Publisher
Microscopy Society of America
ISSN
1431-9276

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