Growth of High-Quality Graphene from Solid Polycyclic Aromatic Hydrocarbons Using a Sealed Crucible Method

IF 6.4 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Hyo Chan Hong, Si Yeon Park, Heewon Jin, Jeong In Ryu, Seung Jun Baek, Dalsu Choi, Hyo Chan Lee
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Abstract

The chemical vapor deposition (CVD) of graphene using solid polycyclic aromatic hydrocarbons (PAHs) as carbon sources has emerged as a promising technique for synthesizing high-quality graphene. However, the use of solid PAHs often results in defective graphene, and the underlying growth mechanism remains poorly understood. In this study, the formation of graphene from pyrene, the simplest solid PAH, on Cu foil inside a sealed crucible, is investigated. Initially, pyrene films are converted into amorphous carbon (a-C). This is followed by the gradual crystallization of a-C near the Cu surface into graphene. The sealed crucible confines the carbon sources, preventing the complete etching of graphene and enabling an extended crystallization period. Furthermore, it is demonstrated that reducing the crucible volume extends the crystallization time, resulting in the formation of highly crystalline graphene. Thus, high-quality graphene from pyrene with electron mobility comparable to that produced using CH₄-based CVD is successfully synthesized. These findings demonstrate the potential of solid carbon sources as viable alternatives to CH₄ in graphene synthesis.

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用密封坩埚法从固体多环芳烃中生长高质量石墨烯
以固体多环芳烃(PAHs)为碳源的石墨烯化学气相沉积(CVD)技术是一种很有前途的制备高质量石墨烯的技术。然而,固体多环芳烃的使用往往会导致石墨烯的缺陷,其潜在的生长机制尚不清楚。在这项研究中,研究了在密封坩埚内的铜箔上,最简单的固体多环芳烃芘形成石墨烯。最初,芘薄膜被转化为无定形碳(a-C)。随后,铜表面附近的a-C逐渐结晶成石墨烯。密封坩埚限制了碳源,防止了石墨烯的完全蚀刻,延长了结晶周期。此外,减小坩埚体积延长了结晶时间,导致高结晶石墨烯的形成。因此,我们成功地从芘中合成了高质量的石墨烯,其电子迁移率可与用CH₄基CVD制备的石墨烯相媲美。这些发现证明了固体碳源在石墨烯合成中作为硫酸ch可行替代品的潜力。
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来源期刊
Advanced Materials Technologies
Advanced Materials Technologies Materials Science-General Materials Science
CiteScore
10.20
自引率
4.40%
发文量
566
期刊介绍: Advanced Materials Technologies Advanced Materials Technologies is the new home for all technology-related materials applications research, with particular focus on advanced device design, fabrication and integration, as well as new technologies based on novel materials. It bridges the gap between fundamental laboratory research and industry.
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