Wafer-scale graphene on 2 inch SiC with uniform structural and electrical characteristics

来源 :Chinese Science Bulletin | 被引量 : 0次 | 上传用户:ladiylove
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Wafer-scale graphene on SiC with uniform structural and electrical features is needed to realize graphene-based radio frequency devices and integrated circuits.Here,a continuous bi/trilayer of graphene with uniform structural and electrical features was grown on 2 inch 6H-SiC (0001) by etching before and after graphene growth.Optical and atomic force microscopy images indicate the surface morphology of graphene is uniform over the 2 inch wafer.Raman and transmittance spectra confirmed that its layer number was also uniform.Contactless resistance measurements indicated the average graphene sheet resistance was 720 /with a non-uniformity of 7.2%.Large area contactless mobility measurements gave a carrier mobility of about 450 cm2 /(V s) with an electron concentration of about 1.5×10 13 cm2.To our knowledge,such homogeneous morphology and resistance on wafer scale are among the best results reported for wafer-scale graphene on SiC. Wafer-scale graphene on SiC with uniform structural and electrical features is needed to realize graphene-based radio frequency devices and integrated circuits. Here, a continuous bi / trilayer of graphene with uniform structural and electrical features was grown on 2 inch 6H-SiC ( 0001) by etching before and after graphene growth. Optical and atomic force microscopy images indicate the surface morphology of graphene is uniform over the 2 inch wafer. Raman and transmittance spectra confirmed that its layer number was also uniform. Contactless resistance measurements indicated the average graphene sheet resistance was 720 / with a non-uniformity of 7.2%. Larger area contactless mobility measurements gave a carrier mobility of about 450 cm2 / (Vs) with an electron concentration of about 1.5 × 10 13 cm2.To our knowledge, morphology and resistance on wafer scale are among the best results reported for wafer-scale graphene on SiC.
其他文献
“Top executives take care of themselves and they take care of each other when they serve on one another’s boards.Too often managers will act to protect their
魔灯(MOODLE)(Modular Object Oriented DynamicLearning Environment)是“面向对象的模块化动态学习环境”的首字母缩写,是由澳大利亚Martin Dougiamas博士主持开发的课程管
The most significant changes of landscape in a certain period are landscape area changes and spatial changes of landscape patches.Based on transfer matrix and t
巢娭毑月饼是长沙本土的知名品牌。近两年来,许多长沙人每逢中秋节前都要到巢娭毑月饼店去排队拿号买月饼。巢娭毑月饼创始人巢金云做月饼已有多年。2013年12月,她将自己的头
2月12日,农历正月初八,人们还沉浸在节日的喜庆之中,可谁料到,灾难已悄悄降临──丽水市丽东村紫金山变成了“火焰山”。 16时55分许,徐丽民等一伙人,围着麻将桌正玩得起劲,突然,二楼传来“
可以肯定地说,退伍消防兵是我们消防战线上的骨干力量,他们的作用发挥得好,我们的防火灭火工作就将做得更好。 当消防兵是光荣的。我们简直不敢想象,这个社会要是少了消防兵会是
目次一、引言二、设立宗旨三、法律主体地位(一)公法人(二)行政相对人(三)市场主体(四)盈利性目标四、国家信用的法律表现形式和制度安排五、与商业银行的关系(一)互补性问题
“实质一致”的认定在20世纪90年代的音乐界,对知名艺人的侵权诉讼颇有愈演愈烈之势。侵权诉讼的风潮发端于20世纪70年代,这些诉讼改变了音乐界本应有的自由氛围,把它变成了
通过日常生活事例或实验了解摩擦力是新课标对本节的要求,对于摩擦力,学生有丰富的感知,影响摩擦力的因素及增大和减小摩擦的方法,学生接受起来都不因难.但从物理学角度分析
编辑同志:3年前,72岁的母亲因病住院治疗。母亲出院后,我们6个子女就对母亲的赡养及财产处置问题达成如下协议:由我将母亲接入家中一起生活,并负全责照顾母亲的起居生活。母