关键词: 云母片, 单层石墨烯, 拉曼光谱, 生物探针分子

Abstract: Raman characterization technique was used to study the properties of a single layer of graphene laid on mica sheet.Single crystal white mica was exposed to heavy ions with irradiation amount of 1×10⁶/cm² for irradiation. HF solution was used to etch the irradiated mica sheet.Hung(holes)and the impending area of graphene was characterized by SEM, and Raman. The experimental results show that after irradiation the mica sheet in HF(40%)with 30 ℃ water bath ultrasonic etching after 20 minutes produces with diamond holes aperture size of about 3 micron.Tile on mica assumes a complete monolayer graphene, graphene partly on the impending area of has cracks, and crack increased with the increase of the aperture and the area. Through Raman microscope detection of monolayer graphene dangling without crack,Raman signals ofthe single layer graphene were obtained. Raman characterization of the biological- DOI:10.3969/j.issn.1000-1565.2019.01.005云母片上单层石墨烯的制备及拉曼光谱研究孙宏丽¹,王腾蛟¹,许军²,李帅¹,王颖¹,李晓莉¹,袁小先(1.河北大学 物理科学与技术学院,河北 保定 071002;2.惠州城市职业学院,广东 惠州 516025)摘 要:采用拉曼表征技术研究了平铺到云母片上单层石墨烯的性质.首先,将单晶白云母暴露在辐照量为1×10⁶个/cm²的重离子中进行辐照,用HF溶液对辐照后的云母片进行蚀刻.之后将CVD(化学气相沉积)法制得的单层石墨烯转移平铺到云母片上,利用SEM、Raman技术对悬空(孔洞之上)及非悬空区域的石墨烯进行分析表征.实验结果表明,辐照后的云母片在HF(体积分数40%)中置于30℃水浴超声蚀刻20 min后产生孔径约为3 μm的菱形孔洞.而平铺在云母上的单层石墨烯样貌完整,部分悬空区域处的石墨烯有所破裂,且破裂面积随孔径增大而增多.利用拉曼电镜对悬空区域进行探测,可以得到仅有单层石墨烯的拉曼信号.采用石墨烯/云母基底对生物探针分子进行拉曼表征,结果显示该基底对探针分子的拉曼信号有增强作用.关键词:云母片;单层石墨烯;拉曼光谱;生物探针分子中图分类号:O433 文献标志码:A 文章编号:1000-1565(2019)01-0023-06Preparation and Raman spectroscopy of single layer graphene on mica sheetSUN Hongli¹, WANG Tengjiao¹,XU Jun²,LI Shuai¹,WANG Ying¹, LI Xiaoli¹,YUAN Xiaoxian¹(1.College of Physics Science and Technology, Hebei University, Baoding 071002, China; 2.City College of Huizhou, Huizhou 516025, China)Abstract:Raman characterization technique was used to study the properties of a single layer of graphene laid on mica sheet.Single crystal white mica was exposed to heavy ions with irradiation amount of 1×10⁶/cm² for irradiation. HF solution was used to etch the irradiated mica sheet.Hung(holes)and the impending area of graphene was characterized by SEM, and Raman. The experimental results show that after irradiation the mica sheet in HF(40%)with 30 ℃ water bath ultrasonic etching after 20 minutes produces with diamond holes aperture size of about 3 micron.Tile on mica assumes a complete monolayer graphene, graphene partly on the impending area of has cracks, and crack increased with the increase of the aperture and the area. Through Raman microscope detection of monolayer graphene dangling without crack,Raman signals ofthe single layer graphene were obtained. Raman characterization of the biological- 收稿日期:2018-06-11 基金项目:国家自然科学基金青年科学基金资助项目(11504077);河北省自然科学基金青年科学基金资助项目(A2017201012);河北省教育厅自然科学重点项目(ZD2017007);河北大学实验室开放项目(SY201637) 第一作者:孙宏丽(1960—),女,蒙古族,内蒙古赤峰人,河北大学正高级工程师,主要从事化学工程方向研究. E-mail:435046657@qq.com 通信作者:袁小先(1985—),女,河北保定人,河北大学实验师,主要从事纳米材料制备及光谱特性研究. E-mail:yuanxiaoxian115@163.com第1期孙宏丽等:云母片上单层石墨烯的制备及拉曼光谱研究probe molecules by using graphene/mica substrate showed that the substrate enhanced Raman signals of the probe molecules.

Key words: mica sheet, single layer graphene, Raman spectroscopy, bioprobe molecule