Fig. 1
From: Planar and van der Waals heterostructures for vertical tunnelling single electron transistors

The fabrication steps of GQD-hBN in-plane heterostructure based on hBN to graphene conversion catalysed by Pt NPs. a The self-assembly of diblock copolymer micelles PS-P4VP with H2PtCl6 on Si/SiO2 substrate. b Transfer of hBN monolayer on SiO2 substrate covered by Pt NPs (blue spheres—boron atoms, yellow spheres—nitrogen). c Formation of the GQDs on top of an array of Pt NPs by catalytically assisted CVD (red spheres—carbon atoms). d The obtained in-plane GQD-hBN heterostructure after the removal of Pt NPs