Synthetic Band Structure Engineering of Graphene Using Block Copolymer-Templated Dielectric Superlattices.

ABSTRACT: Engineering the electronic band structure of two-dimensional (2D) materials by imposing spatially periodic superlattice (SL) potentials opens a pathway to unconventional electronics. Nanopatterning the gate electrode or surface dielectric near 2D crystals provides a powerful strategy for realizing electrostatically tunable "remote" SLs with flexibility in lattice design. Here, we demonstrate the effectiveness of block copolymer (BCP)-templated dielectric nanopatterns for fabricating etch-free high-grade metal oxide SLs. Alumina (AlO_x) nanopatterns with hexagonal symmetry and a 38 nm SL wavelength are produced as a model material by directly converting a self-assembled BCP film via block-selective vapor phase infiltration. Despite micrometer-scale rotational disorder inher

SUBMITTER: Jamalzadeh M 

PROVIDER: S-EPMC11924326 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature