Journal
NANOTECHNOLOGY
Volume 28, Issue 24, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aa7044
Keywords
graphene nanomesh; oxidizing reaction; purified Ar; preheating
Funding
- National Natural Science Foundation of China [61675175, 11604282, 51602276, 51502257, 51472113]
- Open Project of the National Laboratory of Solid State Microstructures of Nanjing University [M29018]
- Science and Technology Project of Henan Province [172102210458]
- Key Research Project of the Henan Provincial Department of Education [17A140011]
- Nanhu Scholars Program for Young Scholars of XYNU
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Graphene nanomeshes (GNMs), new graphene nanostructures with tunable bandgaps, are potential building blocks for future electronic or photonic devices, and energy storage and conversion materials. In previous works, GNMs have been successfully prepared on Cu foils by the H-2 etching effect. In this paper, we investigated the effect of Ar on the preparation of GNMs, and how the mean density and shape of them vary with growth time. In addition, scanning electron microscopy (SEM) and high resolution transmission electron microscopy (TEM) revealed the typical hexagonal structure of GNM. Atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS) indicated that large copper oxide nanoparticles produced by oxidization in purified Ar can play an essential catalytic role in preparing GNMs. Then, we exhibited the key reaction details for each growth process and proposed a growth mechanism of GNMs in purified Ar.
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