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나노 구조 물리 연구단
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Graphene-templated synthesis of C -axis oriented Sb2Te3 nanoplates by the microwave-assisted solvothermal method

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Title
Graphene-templated synthesis of C -axis oriented Sb2Te3 nanoplates by the microwave-assisted solvothermal method
Author(s)
Singh S.; Hong S.; Jeon W.; Lee D.; Jae-Yeol Hwang; Lim S.; Kwon G.D.; Pribat D.; Shin H.; Sung Wng Kim; Seunghyun Baik
Publication Date
2015-04
Journal
CHEMISTRY OF MATERIALS, v.27, no.7, pp.2315 - 2321
Publisher
AMER CHEMICAL SOC
Abstract
The successful mechanical exfoliation and chemical synthesis of graphene has attracted considerable attention for the synthesis of other twodimensional materials on graphene template. Chalcogenide materials such as Sb2Te3 are of interest due to the rhombohedral lattice structure with twodimensional hexagonally closed-packed atomic layers along the c-axis. Here we synthesized c-axis-oriented Sb2Te3 nanoplates (NPs) on graphene substrates by the microwave-assisted solvothermal method. The microwave irradiation resulted in a higher temperature of graphene, compared with the synthesis solution, which was revealed by the single-mode microwave experiments and an analytical model based on energy balance and convective heat transfer. Besides, the lattice mismatch between c-axis-oriented Sb2Te3 and bridge sites of graphene was only 4%, which is also favorable for the graphene-templated Sb2Te3 synthesis. c-Axis-oriented single-crystalline Sb2Te3 NPs as large as 7 μm could be successfully synthesized on graphene with negligible damage of the graphene template. Larger surface coverage could be obtained by merging Sb2Te3 NPs. The merged Sb2Te3 NPs were polycrystalline with rotated grain boundaries. This work provides a facile, rapid, and low-cost synthesis route of c-axis-oriented Sb2Te3 NPs on graphene templates, which may be extended for the synthesis of various two-dimensional materials with hexagonally closed-packed atomic layers along the c-axis.
URI
https://pr.ibs.re.kr/handle/8788114/1768
ISSN
0897-4756
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
Graphene-Templated Synthesis of c_Axis Oriented Sb2Te3 Nanoplates(백승현).pdfDownload

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