Subject Number :S-18-JI-0060 S-17-JI-0036
Support Type : (select) Common use (including technical support necessary for the training),
Technical support (except the training), Technical surrogate,
Collaborative research, Technical consultation
Proposal Title (English) : Microstructure characterization of graphene-Al nanolaminated composites
Username (English) :Lei Zhao, Qiang Guo (underline applicant’s name)
Affiliation (English) : Shanghai Jiao Tong University.

1. Summary
（If the suppor type you used is technical consultation, you only have to describe 1.Summary.）
The microstructure of nanolaminated RGO-Al composites with Helium implanation was characterized by TEM. To determine the Helium element in the bubbles, the interfacial structure was analyzed by EELS combined with STEM.

2. Experimental
(Describe main facilities you used and your experimental method.)
The TEM samples of graphene-Al composites were prepared by focused-ion-beam (FIB) milling using the standard lift-out technique. JEOL-ARM 200F microscope equipped with a GATAN-EELS was used for EELS acquisition. In all STEM/EELS experiments, the ARM microscope was operated at 200 kV in the STEM mode.

3. Results and Discussion
(Give figures and tables if necessary.)
It was found that Helium bubbles preferentially segregated to the graphene/Al interfaces, which was similar to our observations before. However, the Helium peak was not detected by EELS.

It was likely due to the fact that it was difficult to detect Helium element by EELS due to its small inelastic scattering cross-section. In addition, it may be that bubbles contained very small amount of He element.

4. Others
We would like to acknowledge the technical support from professor Yoshifumi Oshima in the School of Materials Science in JAIST, assistant professor Xiaobin Zhang and technical staff Mayumi Itoh in the Center for Nano Materials and Technology in JAIST.

5. Publication/Presentation
N/A

6. Patent
N/A