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石墨烯在Al2O3(0001)表面生长的模拟研究

李锦锦 李多生 洪跃 邹伟 何俊杰

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石墨烯在Al2O3(0001)表面生长的模拟研究

李锦锦, 李多生, 洪跃, 邹伟, 何俊杰

Growth of graphene on Al2O3 (0001) surface

Li Jin-Jin, Li Duo-Sheng, Hong Yue, Zou Wei, He Jun-Jie
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  • 基于密度泛函理论的广义梯度近似法,对用化学气相沉积法在蓝宝石(-Al2O3)(0001)表面上生长石墨烯进行理论研究.研究结果表明:CH4在-Al2O3(0001)表面上的分解是吸热过程,由CH4完全分解出C需要较高能量及反应能垒,这些因素不利于C在衬底表面的存在.在-Al2O3(0001)表面,石墨烯形核的活跃因子并不是通常认为的C原子,而是CH基团.通过CH基团在-Al2O3(0001)表面上的迁移聚集首先形成能量较低的(CH)x结构.模拟研究(CH)x对揭示后续石墨烯的形核生长机理具有重要意义.
    At present, high quality graphene is synthesized mainly by chemical vapor deposition. It is crucial to decompose and adsorb methane (CH4) on the surface of substrate before CH4 grows into graphene. The graphene is grown mainly on metal substrate due to the catalytic effect of metal. It is difficult to grow graphene thin film on the surface of non-metallic substrate, especially on the surface of -Al2O3 (0001). In this paper, the density functional theory based generalized gradient approximation method is applied to simulating the nucleation of graphene on -Al2O3 (0001) surface, synthesized by chemical vapor deposition. First, we establish a scientific -Al2O3 (0001) surface model, then simulate the decomposition process of CH4 on -Al2O3 (0001) surface by calculating the adsorption sites and adsorption configurations of groups and atoms. Finally, we investigate the groups of CH4 decomposition and atom coupling process on -Al2O3 (0001) surface. The results show that the CH3 groups, C and H atoms are preferentially adsorbed at the top of the O atoms, and the adsorption energies are -2.428 eV,-4.903 eV, and -4.083 eV, respectively. The CH2 and CH groups are preferentially adsorbed on the bridge between O and Al atoms with the adsorption energies of -4.460 eV and -3.940 eV, respectively. The decomposition of CH4 on -Al2O3 (0001) surface is an endothermic process. It requires higher energy and cross reactive energy barrier for CH4 to be completely decomposed into C atom, which makes it difficult that the C atom stays on the substrate surface. The coupling process among CH groups on the surface of -Al2O3 (0001) is an exothermic process. When CH and CH groups are coupled, the energy of the system decreases by 4.283 eV. When (CH)2 and CH groups are coupled, the energy of the system decreases by 3.740 eV. The (CH)x can be obtained by continuous migration and coupling between the CH groups on the surface of the -Al2O3 (0001), and (CH)x group is a precursor of graphene growth. The energy of the system decreases in the process. The above results show that the activated atom or group of graphene nucleation is not C atom but CH group. The CH group migration and aggregation on the surface of -Al2O3 (0001) give priority to the formation of lower energy (CH)x structure. In order to better understand the microscopic growth process of graphene on sapphire, it is important to study the role of (CH)x in the surface of sapphire for revealing the nucleation mechanism of graphene.
      通信作者: 李多生, duosheng.li@nchu.edu.cn
    • 基金项目: 国家自然科学基金(批准号:51562027)和江苏省精密与微细制造技术重点实验室基金(批准号:JKL2015001)资助的课题.
      Corresponding author: Li Duo-Sheng, duosheng.li@nchu.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. 51562027) and the Jiangsu Key Laboratory of Precision and Micro Manufacturing Technology Foundation, China (Grant No. JKL2015001).
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    Niu T, Zhou M, Zhang J, Feng Y, Chen W 2013 J. Am. Chem. Soc. 135 8409

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    Ciobca I M, Frechard F, van Santen R A, Kleyn A W, Hafner J 2000 J. Phys. Chem. B 104 3364

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    Watwe R M, Bengaard H S, Rostrup-Nielsen J R, Dumesic J A, Nrskov J K 2000 J. Catal. 189 16

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  • [1]

    Tang S H, Cao X X, He L, Zhu W J 2016 Acta Phys. Sin. 65 146201 (in Chinese) [唐士惠, 操秀霞, 何林, 祝文军 2016 物理学报 65 146201]

    [2]

    Stojchevska L, Vaskivskyi I, Mertelj T, Kusar P, Svetin D, Brazovskii S 2014 Science 344 177

    [3]

    You F, Ji L, Xie Q L, Wang Z, Yue H W, Zhao X J, Fang L, Yan S L 2010 Acta Phys. Sin. 59 5035 (in Chinese) [游峰, 季鲁, 谢清连, 王争, 岳宏卫, 赵新杰, 方兰, 阎少林 2010 物理学报 59 5035]

    [4]

    Wang X, Zhi L G, Mullen K 2008 Nano Lett. 8 323

    [5]

    Simon P, Gogotsi Y 2008 Nat. Mater. 7 845

    [6]

    Kim K S, Zhao Y, Jang H, Lee S Y, Kim J M, Kim K S, Ahn J, Kim P, Choi J Y, Hong B H 2009 Nature 457 706

    [7]

    Zheng H W 2006 Ph. D. Dissertation (Hefei: University of Science and Technology of China) (in Chinese) [郑海务 2006 博士毕业论文 (合肥: 中国科学技术大学)]

    [8]

    Zhang Y B, Tan Y W, Stormer H L, Kim P 2005 Nature 438 201

    [9]

    Li X S, Cai W W, An J H, Kim S, Nah J, Yang D X, Piner R, Velamakanni A, Jung I, Tutuc E, Banerjee S K, Colombo L, Ruoff R S 2009 Science 324 1312

    [10]

    Obraztsov A N 2009 Nat. Nanotech. 4 212

    [11]

    Hofmann S, Csanyi G, Ferrari A C, Payne M C, Robertson J 2005 Phys. Rev. Lett. 95 036101

    [12]

    Bhaviripudi S, Jia X T, Dresselhaus M S, Kong J 2010 Nano Lett. 10 4128

    [13]

    Riikonen S, Krasheninnikov A V, Halonen L, Nieminen R M 2012 J. Phys. Chem. C. 116 5802

    [14]

    Smith J R, Hong T, Smith J R, Srolovitz D J 1995 Acta Metall. Mater. 43 2721

    [15]

    Jiang Z, Pan Q, Li M, Yan T, Fang T 2014 Appl. Surf. Sci. 292 494

    [16]

    Blochl P E 1994 Phys. Rev. B 50 17953

    [17]

    Kresse G, Joubert D 1999 Phys. Rev. B 59 1758

    [18]

    Perdew J P, Burke K, Ernzerhof M 1996 Phys. Rev. Lett. 77 3865

    [19]

    Fischer T H, Almlof J 1992 J. Phys. Chem. B 96 9768

    [20]

    Halgren T A, Lipscomb W N 1977 Chem. Phys. Lett. 49 225

    [21]

    Finger L W, Hazen R M 1978 Appl. Phys. 49 5823

    [22]

    Baxter R, Reinhardt P, Lpez N, Illas F 2000 Surf. Sci. 445 448

    [23]

    Wander A, Searle B, Harrison N M 2000 Surf. Sci. 458 25

    [24]

    Carrasco J, Gomes J R B, Illas F 2004 Phys. Rev. B 69 064116

    [25]

    Rohmann C, Metson J B, Idriss H 2011 Surf. Sci. 605 1694

    [26]

    Chiang H N, Nachimuthu S, Cheng Y C, Damayanti N P, Jiang N P 2016 Surf. Sci. 363 636

    [27]

    Guenard P, Renaud G, Barbier A, Gautiersoyer M 1998 Surf. Rev. Lett. 5 321

    [28]

    Hass K C, Schneider W F, Curioni A, Andreoni W 1998 Science 282 265

    [29]

    Li X, Cai W, Colombo L, Ruoff R S 2009 Nano Lett. 9 4268

    [30]

    Wu P, Zhang W, Li Z, Yang J, Hou J G 2010 J. Chem. Phys. 133 071101

    [31]

    Chen H, Zhu W, Zhang Z 2010 Phys. Rev. Lett. 104 186101

    [32]

    Niu T, Zhou M, Zhang J, Feng Y, Chen W 2013 J. Am. Chem. Soc. 135 8409

    [33]

    Zhang C J, Hu P 2002 J. Phys. Chem. 116 322

    [34]

    Ciobca I M, Frechard F, van Santen R A, Kleyn A W, Hafner J 2000 J. Phys. Chem. B 104 3364

    [35]

    Watwe R M, Bengaard H S, Rostrup-Nielsen J R, Dumesic J A, Nrskov J K 2000 J. Catal. 189 16

    [36]

    Xu J, Saeys M 2008 J. Phys. Chem. C 112 9679

    [37]

    Gao M, Zhang Y F, Huang L, Pan Y, Wang Y, Ding F, Lin Y, Du S X, Gao H J 2016 Appl. Phys. Lett. 109 131604

    [38]

    Treier M, Pignedoli C A, Laino T, Rieger R, Mullen K, Passerone D 2010 Nat. Chem. 3 61

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出版历程
  • 收稿日期:  2017-04-23
  • 修回日期:  2017-07-25
  • 刊出日期:  2017-11-05

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