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Superhydrophobic graphene nanowalls for electromagnetic interference shielding and infrared photodetection via a two-step transfer method
Yang, Qi1,2; Yang, Jun2; Tang, Linlong2; Zhang, Heng2; Wei, Dapeng2; Shi, Haofei2; Wei, Xingzhan2; Zhang, Yupeng1; Su, Bin3
2023-02-15
摘要The growing need for flexible electronic devices has triggered substantial research efforts toward multifunctional surfaces. Herein, flexible and superhydrophobic surfaces based on micro-nanoscale two-tier structures were prepared by combining graphene nanowalls (GNWs) with UV-curable adhesive polymer using a two-step transfer method. These GNWs/UVA surfaces show excellent superhydrophobic properties with a water contact angle (CA) above 170 degrees and a rolling angle (RA) below 5 degrees. The superhydrophobic properties are retained with extreme liquid repellency even after thousand times of bending. The surfaces are highly conductive (conductivity > 3000 S/m) and provide excellent electromagnetic interference (EMI) shielding effect over the range of 8.2-12.4 GHz (Xband). Moreover, the surfaces exhibit high average infrared (IR) absorption up to 85 % in the range of 2-20 mu m, indicating good performance in IR shielding. Furthermore, a long-wave IR photodetector with flexible hydrophobic GNWs/UVA was prepared, which has a responsivity of 28 mu A/W at room temperature. The IR photodetector also has good water resistance stability. The methodology reported here provides a new route to fabricate micro-nano structures for multifunctional superhydrophobic surfaces. It has great potential for myriad applications in commercially viable flexible electronics, EMI protection, and IR photodetection.
关键词Graphene nanowalls Superhydrophobic Flexible Electromagnetic interference Infrared photodetection
DOI10.1016/j.cej.2022.140159
发表期刊CHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
卷号454页码:10
通讯作者Yang, Jun(jyang@cigit.ac.cn) ; Zhang, Yupeng(ypzhang@szu.edu.cn) ; Su, Bin(subin@hust.edu.cn)
收录类别SCI
WOS记录号WOS:000896066400002
语种英语