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利用化学气相沉积法生长在金属衬底上的石墨烯薄膜，由于其尺寸的可控性和转移的便利性，被广泛用作各种透明电极.石墨烯薄膜的方块电阻是衡量其品质的重要指标之一，而石墨烯覆盖完全是保证薄膜拥有优良导电性能的基本前提.本文通过研究评估不确定度的分量，提出利用扫描电子显微镜像素计算微区和宏观覆盖度的方法.考虑到石墨烯薄膜覆盖区域与未覆盖区域边界的确定，以及晶畴数目的选取这两个因素对覆盖度测定造成的误差.通过微区有效扫描电子显微镜图像的确定、宏观石墨烯薄膜有效扫描电子显微镜图像的测量数目以及宏观石墨烯薄膜覆盖均匀性的表达，系统研究了化学气相沉积法生长在金属衬底上的石墨烯薄膜的微区覆盖度、宏观覆盖度和覆盖均匀性.该方法通过获得有限次微区扫描电子显微镜图像，不仅可以计算宏观石墨烯薄膜的覆盖度，还可以给出覆盖均匀性，既节省了测量时间，同时也能保证测量有效性.
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[22] Li X S, Zhu Y W, Cai W W, Borysiak M, Han B, Chen D, Piner R D, Colombo L, Ruoff R S 2009 Nano Lett. 9 4359
[23] Zhao Z J, Shan Z F, Zhang C K, Li Q Y, Tian B, Huang Z Y, Lin W Y, Chen X P, Ji H X, Zhang W F, Cai W W 2015 Small 11 1418
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[1] Geim A K, Novoselov K S 2007 Nat. Mater. 6 183
[2] Geim A K 2009 Science 324 1530
[3] Novoselov K S, Geim A K, Morozov S V, Jiang D, Zhang Y, Dubonos S V, Grigorieva I V, Firsov A A 2004 Science 306 666
[4] Hernandez Y, Nicolosi V, Lotya M, Blighe F M, Sun Z Y, De S, McGovern I T, Holland B, Byrne M, Gun’ko Y K, Boland J J, Niraj P, Duesberg G, Krishnamurthy S, Goodhue R, Hutchison J, Scardaci V, Ferrari A C, Coleman J N 2008 Nat. Nanotechnol. 3 563
[5] Park S, Ruoff R S 2009 Nat. Nanotechnol. 4 217
[6] Berger C, Song Z M, Li X B, Wu X S, Brown N, Naud C, Mayou D, Li T B, Hass J, Marchenkov A N, Conrad E H, First P N, de Heer W A 2006 Science 312 1191
[7] Emtsev K V, Bostwick A, Horn K, Jobst J, Kellogg G L, Ley L, McChesney J L, Ohta T, Reshanov S A, Rohrl J, Rotenberg E, Schmid A K, Waldmann D, Weber H B, Seyller T 2009 Nat. Mater. 8 203
[8] Yu Q, Lian J, Siriponglert S, Li H, Chen Y P, Pei S S 2008 Appl. Phys. Lett. 93 113103
[9] Reina A, Jia X T, Ho J, Nezich D, Son H, Bulovic V, Dresselhaus M S, Kong J 2009 Nano Lett. 9 3087
[10] Sutter P W, Flege J I, Sutter E A 2008 Nat. Mater. 7 406
[11] Kim K S, Zhao Y, Jang H, Lee S Y, Kim J M, Kim K S, Ahn J H, Kim P, Choi J Y, Hong B H 2009 Nature 457 706
[12] Li X S, Cai W W, An J, 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
[13] Levendorf M P, Ruiz-Vargas C S, Garg S, Park J 2009 Nano Lett. 9 4479
[14] Lee Y, Bae S, Jang H, Jang S, Zhu S E, Sim S H, Song Y I, Hong B H, Ahn J H 2010 Nano Lett. 10 490
[15] Nair R R, Blake P, Grigorenko A N, Novoselov K S, Booth T J, Stauber T, Peres N M R, Geim A K 2008 Science 320 1308
[16] Wang X, Zhi L, Mllen K 2008 Nano Lett. 8 323
[17] Blake P, Brimicombe P D, Nair R R, Booth T J, Jiang D, Schedin F, Ponomarenko L A, Morozov S V, Gleeson H F, Hill E W, Geim A K, Novoselov K S 2008 Nano Lett. 8 1704
[18] Li X, Zhang G, Bai X, Sun X, Wang X, Wang E, Dai H 2008 Nature Nanotechnol. 3 538
[19] Becerril H A, Mao J, Liu Z, Stoltenberg R M, Bao Z, Chen Y 2008 ACS Nano 2 463
[20] Huang P Y, Ruiz-Vargas C S, Zande A M, Whitney W S, Levendorf M P, Kevek J W, Garg S, Alden J S, Hustedt C J, Zhu Y, Park J, McEuen P L, Muller D A 2011 Nature 469 389
[21] Tsen A W, Brown L, Levendorf M P, Ghahari F, Huang P Y, Havener R W, Ruiz-Vargas C S, Muller D A, Kim P, Park J 2012 Science 336 1143
[22] Li X S, Zhu Y W, Cai W W, Borysiak M, Han B, Chen D, Piner R D, Colombo L, Ruoff R S 2009 Nano Lett. 9 4359
[23] Zhao Z J, Shan Z F, Zhang C K, Li Q Y, Tian B, Huang Z Y, Lin W Y, Chen X P, Ji H X, Zhang W F, Cai W W 2015 Small 11 1418
[24] Hao Y F, Bharathi M S, Wang L, Liu Y Y, Chen H, Nie S, Wang X H, Chou H, Tan C, Fallahazad B, Ramanarayan H, Magnuson C W, Tutuc E, Yakobson B I, McCarty K F, Zhang Y W, Kim P, Hone J, Colombo L, Ruoff R S 2013 Science 342 720
[25] Wang H, Wang G Z, Bao P F, Yang S L, Zhu W, Xie X, Zhang W J 2012 J. Am. Chem. Soc. 134 3627
[26] Dong G C, Frenken J W M 2013 ACS Nano 7 7028
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