Home / Standards / GB/T 40071-2021 GB/T 40071-2021 Active Nanotechnologies—Measurement of the number of layers of graphene-related two-dimensional (2D) materials—Optical contrast method 纳米技术 石墨烯相关二维材料的层数测量 光学对比度法 Standard Type GBT ICS 17.180.30 CCS A50 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 中国科学院 Drafting Unit N/A