• 文献标题:   Clean Transfer of Large Graphene Single Crystals for High-Intactness Suspended Membranes and Liquid Cells
  • 文献类型:   Article
  • 作  者:   ZHANG JC, LIN L, SUN LZ, HUANG YC, KOH AL, DANG WH, YIN JB, WANG MZ, TAN CW, LI TR, TAN ZJ, LIU ZF, PENG HL
  • 作者关键词:   clean transfer, graphene liquid cell, graphene single crystal, interfacial force control, suspended graphene membrane
  • 出版物名称:   ADVANCED MATERIALS
  • ISSN:   0935-9648 EI 1521-4095
  • 通讯作者地址:   Peking Univ
  • 被引频次:   17
  • DOI:   10.1002/adma.201700639
  • 出版年:   2017

▎ 摘  要

The atomically thin 2D nature of suspended graphene membranes holds promising in numerous technological applications. In particular, the outstanding transparency to electron beam endows graphene membranes great potential as a candidate for specimen support of transmission electron microscopy (TEM). However, major hurdles remain to be addressed to acquire an ultraclean, high-intactness, and defect-free suspended graphene membrane. Here, a polymer-free clean transfer of sub-centimeter-sized graphene single crystals onto TEM grids to fabricate large-area and high-quality suspended graphene membranes has been achieved. Through the control of interfacial force during the transfer, the intactness of large-area graphene membranes can be as high as 95%, prominently larger than reported values in previous works. Graphene liquid cells are readily prepared by p-p stacking two clean single-crystal graphene TEM grids, in which atomic-scale resolution imaging and temporal evolution of colloid Au nanoparticles are recorded. This facile and scalable production of clean and high-quality suspended graphene membrane is promising toward their wide applications for electron and optical microscopy.