Tailoring Surface Properties via Functionalized Hydrofluorinated Graphene Compounds

被引:27
|
作者
Son, Jangyup [1 ,2 ]
Buzov, Nikita [1 ,7 ]
Chen, Sihan [1 ]
Sung, Dongchul [3 ,4 ]
Ryu, Huije [2 ]
Kwon, Junyoung [5 ]
Kim, Sun Phil [1 ]
Namiki, Shunya [1 ]
Xu, Jingwei [1 ]
Hong, Suklyun [3 ,4 ]
Watanabe, Kenji [6 ]
Taniguchi, Takashi [6 ]
King, William P. [1 ]
Lee, Gwan-Hyoung [2 ]
van der Zande, Arend M. [1 ]
机构
[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA
[2] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea
[3] Sejong Univ, Dept Phys & Astron, Graphene Res Inst, Seoul 05006, South Korea
[4] Sejong Univ, GRI TPC IRC, Seoul 05006, South Korea
[5] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea
[6] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
[7] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
基金
新加坡国家研究基金会;
关键词
2D compounds; fluorination; graphene; hydrogenation; patterned chemical functionalization; HYDROGENATED FLUOROGRAPHENE; CONTACT;
D O I
10.1002/adma.201903424
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A new compound material of 2D hydrofluorinated graphene (HFG) is demonstrated whose relative hydrogen/fluorine concentrations can be tailored between the extremes of either hydrogenated graphene (HG) and fluorinated graphene (FG). The material is fabricated through subsequent exposures to indirect hydrogen plasma and xenon difluoride (XeF2). Controlling the relative concentration in the HFG compound enables tailoring of material properties between the extremes offered by the constituent materials and in-plane patterning produces micrometer-scale regions with different surface properties. The utility of the technique to tailor the surface wettability, surface friction, and electrical conductivity is demonstrated. HFG compounds display wettability between the extremes of pure FG with contact angle of 95 degrees +/- 5 degrees and pure HG with contact angle of 42 degrees +/- 2 degrees. Similarly, the HFG surface friction may be tailored between the two extremes. Finally, the HFG electrical conductivity tunes through five orders of magnitude when transitioning from FG to HG. When combined with simulation, the electrical measurements reveal the mechanism producing the compound to be a dynamic process of adatom desorption and replacement. This study opens a new class of 2D compound materials and innovative chemical patterning with applications for atomically thin 2D circuits consisting of chemically/electrically modulated regions.
引用
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页数:7
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