To fabricate free-standing Janus superlattices a PMMA coated Si wafer instead of the Si wafer was used as a substrate A free-standing Janus superlattice was prepared by dissolving 5the sacrificial PMM
为制备自立立体的Janus超晶格,使用了一块涂有PMMA的硅晶圆(而不是硅晶圆)作为基板。通过在丙酮中溶解牺牲性PMMA层,制备了自立立体的Janus超晶格。为了转移Janus超晶格,使用镊子将其拖到基底(如铜网格)上,并小心地将其从丙酮浴中取出晾干。对于NC侧样品,将Janus超晶格面朝下放在基底上并释放,然后从丙酮中取出。
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