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Ko SB, Sun Y, Park G, Choi HJ, Kim JG, Kim JB, Jung HJ, Lee GS, Hong S, Padmajan Sasikala S, Kim SO. Scalable Solution Phase Synthesis of 2D Siloxene via a Two-Step Interlayer Expansion Process. ACS Appl Mater Interfaces 2023. [PMID: 37377389 DOI: 10.1021/acsami.3c05289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Two-dimensional (2D) siloxene is attracting considerable research interest recently principally owing to its inherent compatibility with silicon-based semiconductor technology. -The synthesis of siloxene has been mostly limited to multilayered structures using traditional topochemical reaction procedures. Herein, we report high-yield synthesis of single to few-layer siloxene nanosheets by developing a two-step interlayer expansion and subsequent liquid phase exfoliation procedure. Our protocol enables high-yield production of few-layer siloxene nanosheets with a lateral dimension of up to 4 μm and thickness ranging from 0.8 to 4.8 nm, corresponding to single to a few layers, well stabilized in water. The atomically flat nature of exfoliated siloxene can be exploited for the construction of 2D/2D heterostructure membranes via typical solution processing. We demonstrate highly ordered graphene/siloxene heterostructure films with synergistic mechanical and electrical properties, which deliver noticeably high device capacitance when assembled into a coin cell symmetric supercapacitor device structures. Additionally, we demonstrate that the mechanically flexible exfoliated siloxene-graphene heterostructure enables its direct use in flexible and wearable supercapacitor applications.
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Affiliation(s)
- Seung-Bo Ko
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Yan Sun
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Gun Park
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Hee Jae Choi
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Jin Goo Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - June Beom Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Hong Ju Jung
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Gang San Lee
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Seungbum Hong
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Suchithra Padmajan Sasikala
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Sang Ouk Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
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