Cyclododecane-based high-intactness and clean transfer method for fabricating suspended two-dimensional materials

Zhao Wang, Wenlin Liu (), Jiaxin Shao, He Hao, Guorui Wang, Yixuan Zhao, Yeshu Zhu, Kaicheng Jia, Qi Lu, Jiawei Yang, Yanfeng Zhang, Lianming Tong, Yuqing Song, Pengzhan Sun, Boyang Mao, Chenguo Hu (), Zhongfan Liu (), Li Lin () and Hailin Peng ()
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Zhao Wang: Northwest Agriculture & Forest University
Wenlin Liu: Northwest Agriculture & Forest University
Jiaxin Shao: Peking University
He Hao: Peking University
Guorui Wang: University of Science and Technology of China
Yixuan Zhao: Peking University
Yeshu Zhu: Peking University
Kaicheng Jia: Beijing Graphene Institute
Qi Lu: Beijing
Jiawei Yang: Beijing University of Technology
Yanfeng Zhang: Peking University
Lianming Tong: Beijing Graphene Institute
Yuqing Song: Peking University
Pengzhan Sun: Avenida da Universidade
Boyang Mao: University of Cambridge
Chenguo Hu: Chongqing University
Zhongfan Liu: Beijing Graphene Institute
Li Lin: Peking University
Hailin Peng: Beijing Graphene Institute

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: 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 $${\rm{W}}\,{{\rm{m}}}^{-1}{{\rm{K}}}^{-1}$$ 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 MoS2. 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.

Date: 2024
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DOI: 10.1038/s41467-024-51331-8

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