1. Cyclododecane-based high-intactness and clean transfer method for fabricating suspended two-dimensional materials.
- Author
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Wang, Zhao, Liu, Wenlin, Shao, Jiaxin, Hao, He, Wang, Guorui, Zhao, Yixuan, Zhu, Yeshu, Jia, Kaicheng, Lu, Qi, Yang, Jiawei, Zhang, Yanfeng, Tong, Lianming, Song, Yuqing, Sun, Pengzhan, Mao, Boyang, Hu, Chenguo, Liu, Zhongfan, Lin, Li, and Peng, Hailin
- Subjects
THERMAL conductivity ,ELECTRON microscopy ,GRAPHENE ,MONOMOLECULAR films - Abstract
The high-intactness and ultraclean fabrication of suspended 2D materials has always been a challenge due to their atomically thin nature. Here, we present a universal polymer-free transfer approach for fabricating suspended 2D materials by using volatile micro-molecule cyclododecane as the transfer medium, thus ensuring the ultraclean and intact surface of suspended 2D materials. For the fabricated monolayer suspended graphene, the intactness reaches 99% for size below 10 µm and suspended size reaches 36 µm. Owing to the advantages of ultra-cleanness and large size, the thermal conductivity reaches 4914 W m − 1 K − 1 at 338 K. Moreover, this strategy can also realize efficient batch transfer of suspended graphene and is applicable for fabricating other 2D suspended materials such as MoS
2 . Our research not only establishes foundation for potential applications and investigations of intrinsic properties of large-area suspended 2D materials, but also accelerates the wide applications of suspended graphene grid in ultrahigh-resolution TEM characterization. Here, the authors report a polymer-free transfer method to fabricate suspended 2D materials with high intactness and thermal conductivity, facilitating the application of graphene grids for high-resolution electron microscopy. [ABSTRACT FROM AUTHOR]- Published
- 2024
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