期刊
APPLIED PHYSICS LETTERS
卷 101, 期 11, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4752717
关键词
-
资金
- Swiss National Science Foundation
We investigated the utility of free-standing graphene as a transparent sample carrier for imaging nanometer-sized objects by means of low-energy electron holography. The sample preparation for obtaining contamination-free graphene as well as the experimental set-up and findings are discussed. For incoming electrons with 66 eV kinetic energy, graphene exhibits 27% opacity per layer. Hence, electron holograms of nanometer-sized objects adsorbed on free-standing graphene can be recorded and numerically reconstructed to reveal the object's shapes and distribution. Furthermore, a Moire effect has been observed with free-standing graphene multi-layers. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752717]
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